Transistors, the building blocks of modern electronics, are typically made of silicon. Because it’s a semiconductor, this material can control the flow of electricity in a circuit. But silicon has fundamental physical limits that restrict how compact and energy-efficient a transistor can be.

MIT researchers have now replaced silicon with a magnetic semiconductor, creating a magnetic transistor that could enable smaller, faster, and more energy-efficient circuits. The material’s magnetism strongly influences its electronic behavior, leading to more efficient control of the flow of electricity. 

The team used a novel magnetic material and an optimization process that reduces the material’s defects, which boosts the transistor’s performance.

The material’s unique magnetic properties also allow for transistors with built-in memory, which would simplify circuit design and unlock new applications for high-performance electronics.

“People have known about magnets for thousands of years, but there are very limited ways to incorporate magnetism into electronics. We have shown a new way to efficiently utilize magnetism that opens up a lot of possibilities for future applications and research,” says Chung-Tao Chou, an MIT graduate student in the departments of Electrical Engineering and Computer Science (EECS) and Physics, and co-lead author of a paper on this advance.

Chou is joined on the paper by co-lead author Eugene Park, a graduate student in the Department of Materials Science and Engineering (DMSE); Julian Klein, a DMSE research scientist; Josep Ingla-Aynes, a postdoc in the MIT Plasma Science and Fusion Center; Jagadeesh S. Moodera, a senior research scientist in the Department of Physics; and senior authors Frances Ross, TDK Professor in DMSE; and Luqiao Liu, an associate professor in EECS, and a member of the Research Laboratory of Electronics; as well as others at the University of Chemistry and Technology in Prague. The paper appears today in Physical Review Letters.

Overcoming the limits

In an electronic device, silicon semiconductor transistors act like tiny light switches that turn a circuit on and off, or amplify weak signals in a communication system. They do this using a small input voltage.

But a fundamental physical limit of silicon semiconductors prevents a transistor from operating below a certain voltage, which hinders its energy efficiency.

To make more efficient electronics, researchers have spent decades working toward magnetic transistors that utilize electron spin to control the flow of electricity. Electron spin is a fundamental property that enables electrons to behave like tiny magnets.

So far, scientists have mostly been limited to using certain magnetic materials. These lack the favorable electronic properties of semiconductors, constraining device performance.

“In this work, we combine magnetism and semiconductor physics to realize useful spintronic devices,” Liu says.

The researchers replace the silicon in the surface layer of a transistor with chromium sulfur bromide, a two-dimensional material that acts as a magnetic semiconductor.

Due to the material’s structure, researchers can switch between two magnetic states very cleanly. This makes it ideal for use in a transistor that smoothly switches between “on” and “off.”

“One of the biggest challenges we faced was finding the right material. We tried many other materials that didn’t work,” Chou says.

They discovered that changing these magnetic states modifies the material’s electronic properties, enabling low-energy operation. And unlike many other 2D materials, chromium sulfur bromide remains stable in air.

To make a transistor, the researchers pattern electrodes onto a silicon substrate, then carefully align and transfer the 2D material on top. They use tape to pick up a tiny piece of material, only a few tens of nanometers thick, and place it onto the substrate.

“A lot of researchers will use solvents or glue to do the transfer, but transistors require a very clean surface. We eliminate all those risks by simplifying this step,” Chou says.

Leveraging magnetism

This lack of contamination enables their device to outperform existing magnetic transistors. Most others can only create a weak magnetic effect, changing the flow of current by a few percent or less. Their new transistor can switch or amplify the electric current by a factor of 10.

They use an external magnetic field to change the magnetic state of the material, switching the transistor using significantly less energy than would usually be required.

The material also allows them to control the magnetic states with electric current. This is important because engineers cannot apply magnetic fields to individual transistors in an electronic device. They need to control each one electrically.

The material’s magnetic properties could also enable transistors with built-in memory, simplifying the design of logic or memory circuits.

A typical memory device has a magnetic cell to store information and a transistor to read it out. Their method can combine both into one magnetic transistor.

“Now, not only are transistors turning on and off, they are also remembering information. And because we can switch the transistor with greater magnitude, the signal is much stronger so we can read out the information faster, and in a much more reliable way,” Liu says.

Building on this demonstration, the researchers plan to further study the use of electrical current to control the device. They are also working to make their method scalable so they can fabricate arrays of transistors.

This research was supported, in part, by the Semiconductor Research Corporation, the U.S. Defense Advanced Research Projects Agency (DARPA), the U.S. National Science Foundation (NSF), the U.S. Department of Energy, the U.S. Army Research Office, and the Czech Ministry of Education, Youth, and Sports. The work was partially carried out at the MIT.nano facilities.

DarkSword is a sophisticated piece of malware—probably government designed—that targets iOS.

Google Threat Intelligence Group (GTIG) has identified a new iOS full-chain exploit that leveraged multiple zero-day vulnerabilities to fully compromise devices. Based on toolmarks in recovered payloads, we believe the exploit chain to be called DarkSword. Since at least November 2025, GTIG has observed multiple commercial surveillance vendors and suspected state-sponsored actors utilizing DarkSword in distinct campaigns. These threat actors have deployed the exploit chain against targets in Saudi Arabia, Turkey, Malaysia, and Ukraine...

EFF joins 18 organizations in writing a letter to UK policymakers urging them to address the root causes of online harm—rather than undermining the open web through blunt restrictions.

The coalition, which includes Mozilla, Tor Project, and Open Rights Group, warns that proposed measures following the passage of the Children’s Wellbeing and Schools Bill risk fundamentally reshaping the internet in harmful ways. Chief among these proposals are sweeping age-gating requirements and access restrictions that would apply not only to young people, but effectively to all users.

While framed as efforts to protect children online, these policies rely heavily on age assurance technologies that are either inaccurate, privacy-invasive, or both. As the letter notes, mandating such systems across a wide range of services—from social media and video games to VPNs and even basic websites—would force users to verify their identity simply to access the web. This creates serious risks, including expanded surveillance, data breaches, and the erosion of anonymity.

Beyond privacy concerns, the signatories argue that these measures threaten the core architecture of the open internet. Age-gating at scale could fragment the web into a patchwork of restricted jurisdictions, limit access to information, and entrench the dominance of powerful gatekeepers like app stores and platform ecosystems. In doing so, policymakers risk weakening the very qualities—interoperability, accessibility, and openness—that have made the internet a global public resource.

The letter also emphasizes what’s missing from the current policy approach: meaningful efforts to address the underlying drivers of online harm. Many digital platforms are designed to maximize engagement and profit through pervasive data collection and targeted advertising, often at the expense of user safety and autonomy. Rather than imposing access bans, the coalition calls on UK policymakers to hold companies accountable for these systemic practices and to prioritize user rights by design.

Importantly, the signatories highlight that the internet remains a vital space for young people: offering access to information, support networks, and opportunities for expression that may not exist offline. Policies that restrict access risk cutting off these lifelines without meaningfully reducing harm.

The message is clear: protecting users online requires more than heavy-handed restrictions. It demands thoughtful, rights-respecting policies that tackle the business models and design choices driving harm, while preserving the open, global nature of the web.

Federal courts aren't buying DOJ's argument that climate liability lawsuits undermine U.S. energy policy.

Utah, Oklahoma and Tennessee also have passed laws shielding polluters.

Cooling a home could cost on average as much as $900 between June and September in Southern states.

The American Clean Power Association said DOD's national security reviews — all for farms on private land — haven't been moving forward.

The Arizona senator wants his party to focus on energy affordability over climate change appeals to win control in November.

The state is probing for potential violations of the law, it says.

The technology is mostly used in high-risk areas that are rural or remote, where a blaze might not be quickly spotted by humans.

The majority of plastic particles in the atmosphere are colored and trap heat, leading to warming, according to a new study.

The move clears a key hurdle for the Brazilian biofuel ahead of enforcement of a global IMO framework to cut greenhouse gas emissions in maritime transportation.

William Binney, the NSA surveillance architect-turned-whistleblower, called it the "turnkey totalitarian state." Whoever sits in power gains access to a boundless surveillance empire that scorns privacy and crushes dissent. Politicians will come and go, but you can help us claw the tools of oppression out of government hands.

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Become a Monthly Sustaining Donor

We must stand strong to uphold your privacy and free expression as democratic principles. With members around the world, EFF is empowered to use its trusted voice and formidable advocacy to protect your rights online. Whether giving monthly or one-time donations, members have helped EFF:

• Sue to stop warrantless searches of Automated License Plate Reader (ALPR) records, which reveal millions of drivers’ private habits, movements, and associations.

• Launch Rayhunter, an open source tool that empowers you to help search out cell-site simulators capable of tracking the movements of protestors, journalists, and more.

• Help journalists see through the spin of "copaganda" by breaking down how policing technology companies often market their tools with misleading claims with our Selling Safety report.

Right now, U.S. Congress is on the edge of renewing the international mass spying program known as Section 702, affecting millions. EFF is rallying to cut through the politics and give ordinary people a chance to stop this oppressive surveillance. It’s only possible with help from supporters like you, so join EFF today.

The New EFF Member Gear

Get this year’s new member t-shirt when you join EFF. Aptly titled "Claw Back," the design features an orange boy swatting at the street-level surveillance equipment multiplying in our communities. You might empathize with him, but there’s a better way. Let’s end the law enforcement contracts, harmful practices, and twisted logic that enable mass spying in the first place.

You can also get brand new set of eleven soft and supple polyglot puffy stickers as a token of thanks. Whether you're a kid or a kid at heart, these nostalgic stickers are perfect for digital devices, lunchboxes, and notebooks alike. Our little Ghostie protects privacy in six languages: Arabic, English, Japanese, Persian, Russian, and Spanish.

And for a limited time, get a Privacy Badger Crewneck sweater to help you browse the web with confidence. The embroidered Privacy Badger mascot appears above characters that say "privacy” because human rights are universal. Millions of people around the world use Privacy Badger, EFF's free tool that devours devious scripts and cookies that twist your web browsing into a commodity for Big Tech, advertisers, and scammers.

Privacy is a human right because it gives you a fundamental measure of security and freedom. We owe it to ourselves to fight the mass surveillance used to control and intimidate people. Let’s do this. Join EFF today with a monthly donation or one-time donation and help claw back your privacy.

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EFF is a member-supported U.S. 501(c)(3) organization. We've received top ratings from the nonprofit watchdog Charity Navigator since 2013! Your donation is tax-deductible as allowed by law.

Last September, the United Kingdom’s Prime Minister Keir Starmer announced plans to introduce a new digital ID scheme in the country. The scheme aims to make it easier for people to prove their identities by creating a virtual ID on personal devices with information like names, date of birth, nationality or residency status, and a photo to verify their right to live and work in the country. 

Since then, EFF has joined UK-based civil society organizations in urging the government to reconsider this proposal. In one joint letter from December, ahead of Parliament’s debate around a petition signed by 2.9 million people calling for an end to the government’s plans to roll out a national digital ID, EFF and 12 other civil society organizations wrote to politicians in the country urging MPs to reject the Labour government’s proposal.

Nevertheless, politicians have continued to explore ways to build out a digital ID system in the country, often fluctuating between different ideas and conceptualisations for such a scheme. In their search for clarity, the government launched a consultation, ‘Making public services work for you with your digital identity,’ seeking views on a proposed national digital ID system in the UK. 

EFF submitted comments to this consultation, focusing on six interconnected issues:

1. Mission creep
2. Infringements on privacy rights 
3. Serious security risks
4. Reliance on inaccurate and unproven technologies
5. Discrimination and exclusion
6. The deepening of entrenched power imbalances between the state and the public.

Even the strongest recommended safeguards cannot resolve these issues, and the fundamental core problem that a mandatory digital ID scheme that shifts power dramatically away from individuals and toward the state. They are pursued as a technological solution to offline problems but instead allow the state to determine what you can access, not just verify who you are, by functioning as a key to opening—or closing—doors to essential services and experiences. 

No one should be coerced—technically or socially—into a digital system in order to participate fully in public life. It is essential that the UK government listen to people in the country and say no to digital ID. 

Read our submission in full here.

Although many studies approach the developmental disorder Rett syndrome as a single condition arising from general loss of function in the gene MECP2, a new study by neuroscientists in The Picower Institute for Learning and Memory at MIT shows that two different mutations of the gene caused many distinct abnormalities in lab cultures. Moreover, correcting key differences made by each mutation required different treatments.

“Individual mutations matter,” says Mriganka Sur, senior author of the new open-accdess study in Nature Communications and the Newton Professor in the Picower Institute and the Department of Brain and Cognitive Sciences. “This is an approach to personalizing treatment, even for a single-gene disorder.”

The study employed advanced 3D human brain tissue cultures called “organoids” or “minibrains” derived from skin cells or blood cells donated by Rett syndrome patients with each mutation. Lead author Tatsuya Osaki, a Picower Institute research scientist, says that the organoids’ ability to model the specific consequences of each mutation enabled him to gain mutation-specific insights that haven’t emerged in prior studies, where scientists just knocked out MECP2 overall. The organoids also provided a novel opportunity to understand how each mutation affected different cell types and their interactions.

Distinct effects

More than 800 mutations in MECP2 can cause Rett syndrome, but just eight account for more than 60 percent of cases. Sur and Osaki chose one of these, R306C, which involves a difference of just one DNA base pair (916C>T), because it represents 7-8 percent of Rett syndrome cases. The other mutation they chose, V247X, is much more rare and severe because it cuts off production of the gene’s protein product by a single DNA base deletion (705Gdel), leaving the protein not just errant, but incomplete.

In organoids cultured for three months, each mutation produced some common but also sometimes distinct consequences compared to control organoids with non-mutated MECP2. For many of their experiments, the team used “three-photon” microscopes capable of cellular-level resolution all the way through the organoids’ approximate 1 millimeter thickness, resolving both their structure (via “third-harmonic generation” imaging), and the live activity patterns of their neurons (via calcium fluorescence).

For instance, the scientists observed that the V247X organoids exhibited several structural differences from their controls — they were larger and had different thicknesses of various layers — but the R306C ones were much more like their controls. Organoids harboring either mutation exhibited less-developed axon projections from their neurons, compared to their control comparators.

Looking at properties of neural activity and connectivity in the organoids, the scientists found some similar deficits across both mutations. Both showed reduced spiking activity and synchronicity between neurons compared to in their controls.

But when the scientists looked at other properties, the organoids started to diverge from each other. In particular, an indication of the efficiency of their network structure called “small-world propensity” (SWP) was decreased in R306C organoids, and increased in V247X ones, compared to controls. This means that both mutations altered the development of typical network structures for information processing, but in different directions.

To ensure that their results were meaningful for Rett syndrome patients, the team collaborated with Charles Nelson at Boston Children’s Hospital, whose team measured EEG in several children with different Rett mutations. Although the sample was small, the researchers measured indications that the SWP property in the EEG readings was altered in the volunteers, much like in the organoids.

Finally, by labeling excitatory neurons to flash in one color and inhibitory neurons to flash in a different color, the scientists were able to see that connectivity between the different neural types differed significantly from controls in the V247X organoids.

Treatment tests

All the testing showed that each mutation caused several changes in organoid structure, activity, and connectivity, and that the deviations were often particular to the specific mutation.

To understand how these differences emerged, and how they might be corrected, Sur and Osaki’s team turned to examining how the cells in each kind of organoid might be expressing their genes differently than controls. Differences in gene expression often lead to alterations of key molecular pathways in cells that can disrupt their activity and function. Analysis with a technique called single cell RNA sequencing indeed yielded hundreds of differences in each organoid type, where some genes were expressed more than in controls while others were underexpressed.

For instance, the analyses revealed that in R306C organoids a gene called HDAC2 was overexpressed. That protein is known for repressing expression of other genes. Meanwhile, in the V247X organoids, the scientists found reduced expression of genes for some receptors of the inhibitory neurotransmitter GABA. These organoids also showed defects in the function of astrocyte cells, which support many aspects of neural function.

Organoids with either mutation also exhibited aberrations in molecular pathways that enable the development of circuit connections between neurons, called synapses.

Given the specific defects they observed, the scientists decided to treat the organoids with a drug that can inhibit HDAC2 activity and another that increases GABA’s efficacy. The HDAC2 inhibitor restored neuronal activity and SWP to normal levels in the R306C organoids, and the GABA “agonist” baclofen restored SWP to control levels in the V247X organoids.

Osaki notes each of the treatment drugs has already been studied in other disease contexts, meaning they are well-understood drugs that could be repurposed.

Now that the researchers have developed an organoid platform for dissecting individual mutations’ consequences, identifying both their roots and testing treatments, they plan to apply it to studying four more mutations, Sur says, comparing all of them against a standardized control organoid.

In addition to Sur, Osaki, and Nelson, the paper’s other authors are Chloe Delepine, Yuma Osako, Devorah Kranz, April Levin, and Michela Fagiolini.

The National Institutes of Health, a MURI grant, The Freedom Together Foundation, and the Simons Foundation provided support for the research.

Each year, more than 1,500 researchers rely on over 200 tools and instruments at MIT.nano to pursue experiments that span MIT’s disciplines, collectively generating 160,000 hours of work across 88,000 instances of tool use. Behind this activity is an operational framework that must discretely coordinate access, maintain fairness, and keep research moving without friction.

Managing such a dynamic environment requires more than a scheduling calendar. An automated reservation system serves as the connective tissue of the facility, balancing demand across diverse user needs while supporting the practical realities of a shared lab space. Researchers arrive at MIT.nano with different workflows, safety requirements, and administrative needs, yet the system must present a seamless experience. Integration with MIT’s broader digital infrastructure, from onboarding and authentication to safety training and billing, ensures that access is both efficient and compliant, reducing barriers so researchers can focus on their work.

A system for the modern era

Over the past three years, during a period of rapid growth in both equipment and facility usage, MIT.nano undertook a transition to a new platform designed to scale with demand while maintaining operational continuity. The effort reflects an ongoing commitment to evolving infrastructure that supports the pace, complexity, and collaborative spirit of modern research.

The importance of robust laboratory management systems has long been recognized at MIT. For decades, researchers in the Microsystems Technology Laboratories (MTL) and the Materials Research Laboratory relied on the CORAL lab management platform to reserve and manage shared instrumentation. Jointly developed by MIT and Stanford University and introduced in 2003, CORAL represented a significant advance over the text-based system it replaced. But by the time MIT.nano adopted CORAL in 2018, active development had slowed, and the platform was beginning to show its age, most visibly through the absence of modern web and mobile interfaces expected by today’s users.

To address these limitations, MIT.nano has transitioned to NEMO, an open-source laboratory management system originally developed at the National Institute of Standards and Technology. NEMO centralizes scheduling, communication, and operational logistics into a single platform that manages tool reservations and user access while supporting facility growth. Its modular architecture and plugin framework allow for extensive customization, enabling the system to evolve alongside the needs of a large, shared research environment.

“Over time, NEMO was replicating core functionalities of CORAL while introducing new features that CORAL simply could not support,” explains Thomas Lohman, senior software and systems manager at MTL and a long-time contributor to CORAL’s development. “The question became whether to continue patching the old system or adopt this new platform that already had a lot of the features we use daily, as well as an active community continually improving it.”

For MIT.nano leadership, modernization was about more than replacing an aging tool. “We needed a system that centralizes everything a facility user depends on — policies, tool documentation, training workflows, and communications — within a user-friendly, mobile-accessible environment,” says Anna Osherov, associate director for Characterization.nano, who led the evaluation and transition effort. “Just as important was making sure the platform enhances the experience for both users and staff.”

Collaborating at MIT and with shared access facilities

MIT.nano collaborated closely with Mathieu Rampant, NEMO project lead and CEO of Atlantis Labs, to adopt the community edition of NEMO, an extended version enriched by contributions from a growing global user base. The open-source model ensures that improvements developed at MIT.nano benefit the broader research community, reinforcing a shared ecosystem of innovation. “The NEMO community is expanding rapidly, and many new features originate directly from facility users and administrators,” says Rampant. “That collaborative model allows improvements to propagate quickly while giving institutions a sense of ownership in the platform’s evolution.”

NEMO introduces modern features long requested by MIT.nano researchers, including mobile access, improved transparency, and streamlined workflows. Facility users can now monitor their own tool usage and consumables, customize notifications, register for training, join real-time equipment waitlists, report issues, and communicate with staff, all through a unified dashboard. What was once distributed across multiple systems is now centralized, reducing friction in day-to-day lab operations.

Launching a new platform at the scale of MIT.nano required careful planning and sustained collaboration. The system needed to support multiple facility types, integrate with existing MIT infrastructure, and accommodate a diverse set of instrumentation workflows. “Features that work well in a typical characterization lab can quickly become a burden in a more chemically active environment like the cleanroom,” explains Jorg Scholvin, associate director of Fab.nano. “Relying on researchers to log in using personal devices and Duo authentication, for example, would be impractical in that setting.”

To address these challenges, MIT.nano collaborated with MIT Information Systems and Technology Associate Vice President Olu Brown and Senior Director for Infrastructure Operations Marco Gomes and their teams to streamline integration between MIT systems and NEMO for cleanroom users. “The availability of modern APIs allowed us to connect very different systems efficiently and deliver a convenient, seamless, and productive experience in the lab,” says Scholvin.

The result is a platform that now processes thousands of reservations, communications, and operational actions daily. “We truly value the partnership with MIT.nano and appreciate the collaboration throughout this effort,” says Gomes. “It’s been a great example of teams working together to deliver something meaningful for the research community.”

As one of the largest shared-access facilities deploying NEMO, MIT.nano has played a central role in advancing the platform’s capabilities, both by helping shape its development and by demonstrating a model that is scalable and effective for other facilities and research centers nationwide. Enhancements first created to meet MIT.nano’s needs are now leveraged by other facilities adopting NEMO across the globe. 

In 1985, the Innovative Design Fund placed an ad in Scientific American offering up to $10,000 to support clever prototypes for clothing, home decor, and textiles. William Freeman PhD ’92, then an electrical engineer at Polaroid and now an MIT professor, saw it and submitted a novel idea: a three-sided zipper. Instead of fastening pants, it’d be like a switch that seamlessly flips chairs, tents, and purses between soft and rigid states, making them easier to pack and put together.

Freeman’s blueprint was much like a regular zipper, except triangular. On each side, he nailed a belt to connect narrow wooden “teeth” together. A slider wrapping around the device could be moved up to fasten the three strips into place, straightening them into a triangular tube. His proposal was rejected, but Freeman patented his prototype and stored it in his garage in the hopes it might come in handy one day.

Nearly 40 years later, MIT Computer Science and Artificial Intelligence Laboratory (CSAIL) researchers wanted to revive the project to create items with “tunable stiffness.” Prior attempts to adjust that weren’t easily reversible or required manual assembly, so CSAIL built an automated design tool and adaptable fastener called the “Y-zipper.” The scientists’ software program helps users customize three-sided zippers, which it then builds on its own in a 3D printer using plastics. These devices can be attached or embedded into camping equipment, medical gear, robots, and art installations for more convenient assembly.

“A regular zipper is great for closing up flat objects, like a jacket, but Freeman ideated something more dynamic. Using current fabrication technology, his mechanism can transform more complex items,” says MIT postdoc and CSAIL researcher Jiaji Li, who is a lead author on an open-access paper presenting the project. “We’ve developed a process that builds objects you can rapidly shift from flexible to rigid, and you can be confident they’ll work in the real world.”

Why zippers?

Users can customize how the fasteners look when they’re zipped up in CSAIL’s software program; they can select the length of each strip, as well as the direction and angle at which they’ll bend. They can also choose from one of four motion “primitives” to select how the zipper will appear when it’s zipped up: straight, bent (similar to an arch), coiled (resembling a spring), or twisted (looks like screws).

The Y-zipper that results will appear to “shape-shift” in the real world. When unzipped, it can look like a squid with three sprawling tentacles, and when you close it up, it becomes a more compact structure (like a rod, for instance). This flexibility could be useful when you’re traveling — take pitching a tent, for example. The process can take up to six minutes to do alone, but with the Y-zipper’s help, it can be done in one minute and 20 seconds. You simply attach each arm to a side of the tent, supporting the structure from the top so that the zipper seemingly pops the canopy into place. 

This seamless transition could also unlock more flexible wearables, often useful in medical scenarios. The team wrapped the Y-zipper around a wrist cast, so that a user could loosen it during the day, and zip it up at night to prevent further injuries. In turn, a seemingly stiff device can be made more comfortable, adjusting to a patient’s needs.

The system can also aid users in crafting technology that moves at the push of a button. One can attach a motor to the Y-zipper after fabrication to automate the zipping process, which helps build things like an adaptive robotic quadruped. The robot could potentially change the size of its legs, tightening up into taller limbs and unzipping when it needs to be lower to the ground. Eventually, such rapid adjustments could help the robot explore the uneven terrain of places like canyons or forests. Actuated Y-zippers can also build dynamic art installations — for example, the team created a long, winding flower that “bloomed” thanks to a static motor zipping up the device.

Mastering the material

While Li and his colleagues saw the creative potential of the Y-zipper, it wasn’t yet clear how durable it would be. Could they sustain daily use?

The team ran a series of stress tests to find out. First, they evaluated the strength and flexibility of polylactic acid (PLA) and thermoplastic polyurethane (TPU), two plastics commonly used in 3D printing. Using a machine that bent the Y-zippers down, they found that PLA could handle heavier loads, while TPU was more pliable.

In another experiment, CSAIL researchers used an actuator to continuously open and close the Y-zipper to see how long it’d take to snap. Some 18,000 cycles of zipping and unzipping later, they finally broke. Y-zipper’s secret to durability, according to 3D simulations: its elastic structure, which helps distribute the stress of heavy loads.

Despite these findings, Li envisions an even more durable three-sided zipper using stronger materials, like metal. They may also make the zippers bigger for larger-scale projects, but that’s not yet possible with their current 3D printing platform.

Jiaji also notes that some applications remain unexplored, like space exploration, wherein Y-zipper’s tentacles could be built into a spacecraft to grab nearby rock samples. Likewise, the zippers could be embedded into structures that can be assembled rapidly, helping relief workers quickly set up shelters or medical tents during natural disasters and rescues.

“Reimagining an everyday zipper to tackle 3D morphological transitions is a brilliant approach to dynamic assembly,” says Zhejiang University assistant professor Guanyun Wang, who wasn’t involved in the paper. “More importantly, it effectively bridges the gap between soft and rigid states, offering a highly scalable and innovative fabrication approach that will greatly benefit the future design of embodied intelligence.”

Li and Freeman wrote the paper with Tianjin University PhD student Xiang Chang and MIT CSAIL colleagues: PhD student Maxine Perroni-Scharf; undergraduate Dingning Cao; recent visiting researchers Mingming Li (Zhejiang University), Jeremy Mrzyglocki (Technical University of Munich), and Takumi Yamamoto (Keio University); and MIT Associate Professor Stefanie Mueller, who is a CSAIL principal investigator and senior author on the work. Their research was supported, in part, by a postdoctoral research fellowship from Zhejiang University and the MIT-GIST Program.

The researchers’ work was presented at the ACM’s ​​Computer-Human Interaction (CHI) conference on Human Factors in Computing Systems in April.

Digital Fairness in the EU

The next few years will be decisive for EU digital policymaking. With major laws like the Digital Services Act, the Digital Markets Act, and the AI Act now in place, the EU is entering an enforcement era that will show whether these rules are rights-respecting or drift toward overreach and corporate control. With the proposed EU’s Digital Fairness Act (DFA), the Commission is now turning to increasingly visible risks for users, such as dark patterns and exploitative personalization. Its “Digital Fairness Fitness Check” makes clear that existing consumer rules need updating to reflect how digital markets operate today. 

But not all proposed solutions point in the right direction. Regulators are already flirting with measures that rely on expanded surveillance, such as age verification mandates—surface-level fixes that risk undermining fundamental rights while offering little more than a false sense of protection. 

For EFF, digital fairness means addressing the root causes of harm, not requiring platforms to exert more control over their users. It means safeguarding privacy, freedom of expression, and the rights of users and developers.

If the DFA is to make a real difference, it must tackle structural imbalances. Lawmakers should focus on two interlocking principles. First, prioritize privacy. Reforms should address harms driven by surveillance-based business models, alongside deceptive design practices that impair informed choices. Second, strengthen user sovereignty, which is also a necessary precondition for European digital sovereignty more broadly. Strengthening user sovereignty means taking measures that address user lock-in, coercive contract terms, and manipulative defaults that limit users’ ability to freely choose how they use digital products and services.

Together, these principles would support the EU’s objectives of consistent consumer protection, fair markets, and a more coherent legal framework. If implemented properly, the EU could address power imbalances and build trust in Europe’s digital economy. 

Ban Dark Patterns  

Dark patterns are practices that impair users’ ability to make informed and autonomous decisions. Many companies deploy these tactics through interface design to steer choices and influence behavior. Their impact goes beyond poor consumer decisions. Dark patterns push users to share personal data they would not otherwise disclose and undermine autonomy by making alternatives harder to access. 

The DFA should address this by clearly prohibiting misleading interfaces that distort user choice in commercial contexts. While the Digital Services Act introduced a definition, it only partially bans such practices and leaves gaps across existing consumer law rules. The DFA should close these gaps by, at the very least, introducing explicit prohibitions and clearer enforcement rules, without resorting to design mandates. 

Tackle Commercial Surveillance 

At the core of digital unfairness lies the pervasive collection and use of personal data. Surveillance and profiling drive many of the harms regulators are trying to address, from dark patterns to exploitative personalization. The DFA should tackle these incentives directly by reducing reliance on surveillance-based business models. These practices are fundamentally incompatible with privacy and fairness, and they distort digital markets by rewarding data exploitation rather than quality of service. At a minimum, the DFA should address unfair profiling and surveillance advertising by strengthening privacy rights and banning pay-for-privacy schemes. Users should not have to trade their data or pay extra to avoid being tracked. Accordingly, the DFA should support the recognition of automated privacy signals by web browsers and mobile operating systems, which give users a better way to reject tracking and exercise their rights. Practices that override such signals through banners or interface design should be considered unfair. 

Addressing surveillance and profiling also protects children, since many online harms are tied to the collection and exploitation of their data. Systems that serve ads or curate content often rely on intrusive profiling practices, raising concerns about privacy and fairness, particularly when applied to minors. Rather than turning to invasive age verification, the focus should be on limiting data use by default.

Strengthen User Sovereignty  

There is a major gap in how EU law addresses user autonomy in digital markets: Many digital products and services still restrict what people can do with what they pay for through opaque or one-sided licensing terms, technical protection measures, and remote controls. These mechanisms increasingly limit lawful use, modification, or access after purchase, allowing providers to revoke access, disable functionalities, or degrade performance over time. In practice, this turns ownership into a conditional rental.  

Consumers must be able to use and resell digital goods without hidden limitations and with clear licensing terms. Too often, technical and contractual lock-ins, including remote lockouts and unilateral restrictions on functionality, erode that control. Recent legal reforms show that progress is possible. Rules such as those under the Digital Markets Act have begun to curb technical and contractual barriers and promote user choice. However, many restrictions persist.

The DFA must address these practices by targeting unfair post-sale restrictions and strengthening users’ ability to control and switch services. This means setting clear limits on unfair terms and misleading practices, alongside robust transparency on how digital services function over time. It should also strengthen interoperability and support user control, allowing people to access third-party applications and to let trusted applications act on their behalf, reducing lock-in and expanding meaningful choice in how users interact with digital services. 

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