Tech
A biocompatible and stretchable transistor for implantable devices
Recent technological advances have opened new possibilities for the development of advanced biomedical devices that could be implanted inside the human body. These devices could be used to monitor biological signals that offer insight about the evolution of specific medical conditions or could even help to alter problematic physiological processes.
Despite their potential for the diagnosis and treatment of some conditions, most implantable devices developed to date are based on rigid electronic components. These components can damage tissue inside the body or cause inflammation.
Some electronics engineers have been trying to develop alternative implantable electronics that are based on soft and stretchable materials, such as polymers. However, most known polymers and elastic materials are not biocompatible, which means that they can provoke immune responses and adversely affect the growth of cells.
Researchers at Kyung Hee University, Sungkyunkwan University and other institutes in South Korea have introduced a new organic transistor, a device that modulates the flow of electrical current in circuits, which appears to be both stretchable and biocompatible.
Their device, introduced in a paper in Nature Electronics, was made using a blend of extremely thin semiconducting fibers and a biocompatible composite elastic material.
“For more than a decade, our group has been working on intrinsically stretchable semiconductors that can elongate like human skin while still functioning as transistors,” Jin Young Oh, senior author of the paper, told Tech Xplore.
“While we made progress in mechanical stretchability, one critical limitation remained: most elastomers used in research were industrial grade, lacking true biocompatibility for safe long-term implantation. This challenge inspired us to rethink materials at a fundamental level.”
The researchers involved in the development of the new transistor have been exploring the use of organic semiconductors and medical elastomers for the development of biomedical devices for some time now.
Building on their earlier work, they tried to realize the first transistor that is stretchable, but that can also be safely inserted inside the body without causing inflammation or damaging tissue.
“Our transistor is built from a composite of a high-performance semiconducting polymer (DPPT-TT) and a medical-grade rubber called brominated isobutylene–isoprene rubber (BIIR),” explained Oh.
“Using a vulcanization process which is a classical rubber crosslinking method, we created a nanofiber network of semiconductors embedded in an elastic, biocompatible matrix. This architecture provides both stable charge transport and exceptional mechanical softness.”
The researchers designed dual-layer electrodes for their device that are made of silver and gold, two materials that are conductive, chemically stable and would not become corroded when placed in bodily fluids for prolonged periods of time.
In initial tests, they found that their transistor could stretch up to 50% strain, successfully enduring 10,000 cycles of stretching while still operating normally.
Oh and his colleagues also implanted their device under the skin of mice, to assess its performance and safety in biological environments. They found that the transistor performed remarkably well, while also conforming to the animals’ tissue and resisting degradation when in contact with biological fluids.
“We showed not only stable device operation under physiological conditions but also excellent in vitro and in vivo safety, with no inflammation or fibrotic encapsulation after 30 days of implantation,” said Oh. “We further validated logic gates and active-matrix arrays, proving the scalability of the platform.”
The soft and biocompatible transistor developed by this team of researchers could soon be used to develop a wide range of electronics. These include biosensors that can monitor physiological processes, smart implants for the precise delivery of drugs, prosthetic systems that connect the brain with robotic limbs and even new types of consumer devices.
“Our next studies will follow two distinct directions,” said Oh. “On the hardware side, we aim to further improve transistor performance, scalability, and integration into complex circuits such as logic-in-memory architectures. On the biomedical side, we plan extended in vivo studies to validate long-term safety and reliability.”
Eventually, Oh and his colleagues would also like to explore the possibility of using their transistor to create implantable brain-inspired devices. For example, they envision new energy-efficient and AI-powered systems that could sense the environment inside the body, while also making predictions based on the data they collect.
“Ultimately, we envision combining hardware advances with AI-driven software to create self-learning implantable electronics,” added Oh.
Written for you by our author Ingrid Fadelli, edited by Sadie Harley, and fact-checked and reviewed by Robert Egan—this article is the result of careful human work. We rely on readers like you to keep independent science journalism alive.
If this reporting matters to you,
please consider a donation (especially monthly).
You’ll get an ad-free account as a thank-you.
More information:
Kyu Ho Jung et al, A biocompatible elastomeric organic transistor for implantable electronics, Nature Electronics (2025). DOI: 10.1038/s41928-025-01444-9.
© 2025 Science X Network
Citation:
A biocompatible and stretchable transistor for implantable devices (2025, September 17)
retrieved 17 September 2025
from https://techxplore.com/news/2025-09-biocompatible-stretchable-transistor-implantable-devices.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.
Tech
Anthropic Supply-Chain-Risk Designation Halted by Judge
Anthropic won a preliminary injunction barring the US Department of Defense from labeling it a supply-chain risk, potentially clearing the way for customers to resume working with the company. The ruling on Thursday by Rita Lin, a federal district judge in San Francisco, is a symbolic setback for the Pentagon and a significant boost for the generative AI company as it tries to preserve its business and reputation.
“Defendants’ designation of Anthropic as a ‘supply chain risk’ is likely both contrary to law and arbitrary and capricious,” Lin wrote in justifying the temporary relief. “The Department of War provides no legitimate basis to infer from Anthropic’s forthright insistence on usage restrictions that it might become a saboteur.”
Anthropic and the Pentagon did not immediately respond to requests to comment on the ruling.
The Department of Defense, which under Trump calls itself the Department of War, has relied on Anthropic’s Claude AI tools for writing sensitive documents and analyzing classified data over the past couple of years. But this month, it began pulling the plug on Claude after determining that Anthropic could not be trusted. Pentagon officials cited numerous instances in which Anthropic allegedly placed or sought to put usage restrictions on its technology that the Trump administration found unnecessary.
The administration ultimately issued several directives, including designating the company a supply-chain risk, which have had the effect of slowly halting Claude usage across the federal government and hurting Anthropic’s sales and public reputation. The company filed two lawsuits challenging the sanctions as unconstitutional. In a hearing on Tuesday, Lin said the government had appeared to illegally “cripple” and “punish” Anthropic.
Lin’s ruling on Thursday “restores the status quo” to February 27, before the directives were issued. “It does not bar any defendant from taking any lawful action that would have been available to it” on that date, she wrote. “For example, this order does not require the Department of War to use Anthropic’s products or services and does not prevent the Department of War from transitioning to other artificial intelligence providers, so long as those actions are consistent with applicable regulations, statutes, and constitutional provisions.”
The ruling suggests the Pentagon and other federal agencies are still free to cancel deals with Anthropic and ask contractors that integrate Claude into their own tools to stop doing so, but without citing the supply-chain-risk designation as the basis.
The immediate impact is unclear because Lin’s order won’t take effect for a week. And a federal appeals court in Washington, DC, has yet to rule on the second lawsuit Anthropic filed, which focuses on a different law under which the company was also barred from providing software to the military.
But Anthropic could use Lin’s ruling to demonstrate to some customers concerned about working with an industry pariah that the law may be on its side in the long run. Lin has not set a schedule to make a final ruling.
Tech
How Trump’s Plot to Grab Iran’s Nuclear Fuel Would Actually Work
President Donald Trump and top defense officials are reportedly weighing whether to send ground troops to Iran in order to retrieve the country’s highly enriched uranium. However, the administration has shared little information about which troops would be deployed, how they would retrieve the nuclear material, or where the material would go next.
“People are going to have to go and get it,” secretary of state Marco Rubio said at a congressional briefing earlier this month, referring to the possible operation.
There are some indications that an operation is close on the horizon. On Tuesday, The Wall Street Journal reported that the Pentagon has imminent plans to deploy 3,000 brigade combat troops to the Middle East. (At the time of writing, the order has not been made.) The troops would come from the Army’s 82nd Airborne Division, which specializes in “joint forcible entry operations.” On Wednesday, Iran’s government rejected Trump’s 15-point plan to end the war, and White House press secretary Karoline Leavitt said that the president “is prepared to unleash hell” in Iran if a peace deal is not reached—a plan some lawmakers have reportedly expressed concern about.
Drawing from publicly available intelligence and their own experience, two experts outlined the likely contours of a ground operation targeting nuclear sites. They tell WIRED that any version of a ground operation would be incredibly complicated and pose a huge risk to the lives of American troops.
“I personally think a ground operation using special forces supported by a larger force is extremely, extremely risky and ultimately infeasible,” Spencer Faragasso, a senior research fellow at the Institute for Science and International Security, tells WIRED.
Nuclear Ambitions
Any version of the operation would likely take several weeks and involve simultaneous actions at multiple target locations that aren’t in close proximity to each other, the experts say. Jonathan Hackett, a former operations specialist for the Marines and the Defense Intelligence Agency, tells WIRED that as many as 10 locations could be targeted: the Isfahan, Arak, and Darkhovin research reactors; the Natanz, Fordow, and Parchin enrichment facilities; the Saghand, Chine, and Yazd mines; and the Bushehr power plant.
According to the International Atomic Energy Agency, Isfahan likely has the majority of the country’s 60 percent highly enriched uranium, which may be able to support a self-sustaining nuclear chain reaction, though weapon-grade material generally consists of 90 percent enriched uranium. Hackett says that the other two enrichment facilities may also have 60 percent highly enriched uranium, and that the power plant and all three research reactors may have 20 percent enriched uranium. Faragasso emphasizes that any such supplies deserve careful attention.
Hackett says that eight of the 10 sites—with the exception of Isfahan, which is likely intact underground, and “Pickaxe Mountain,” a relatively new enrichment facility near Natanz—were mostly or partially buried after last June’s air raids. Just before the war, Faragasso says, Iran backfilled the tunnel entrances to the Isfahan facility with dirt.
The riskiest version of a ground operation would involve American troops physically retrieving nuclear material. Hackett says that this material would be stored in the form of uranium hexafluoride gas inside “large cement vats.” Faragasso adds that it’s unclear how many of these vats may have been broken or damaged. At damaged sites, troops would have to bring excavators and heavy equipment capable of moving immense amounts of dirt to retrieve them
A comparatively less risky version of the operation would still necessitate ground troops, according to Hackett. However, it would primarily use air strikes to entomb nuclear material inside of their facilities. Ensuring that nuclear material is inaccessible in the short to medium term, Faragasso says, would entail destroying the entrances to underground facilities and ideally collapsing the facilities’ underground roofs.
Softening the Area
Hackett tells WIRED that based on his experience and all publicly available information, Trump’s negotiations with Iran are “probably a ruse” that buys time to move troops into place.
Hackett says that an operation would most likely begin with aerial bombardments in the areas surrounding the target sites. These bombers, he says, would likely be from the 82nd Airborne Division or the 11th or 31st Marine Expeditionary Units (MEU). The 11th MEU, a “rapid-response” force, and the 31st MEU, the only Marine unit continuously deployed abroad in strategic areas, have reportedly both been deployed to the Middle East.
Tech
Amazon’s Spring Sale Is So-So, but Cadence Capsules Are a Bright Spot
The WIRED Reviews Team has been covering Amazon’s Big Spring Sale since it began at on Wednesday, and the overall deals have been … not great, honestly. So far, we’ve found decent markdowns on vacuums, smart bird feeders, and even an air fryer we love, but I just saw that Cadence Capsules, those colorful magnetic containers you may have seen on your social media pages, are 20 percent off. (For reference, the last time I saw them on sale, they were a measly 9 percent off.)
If you’re not familiar, they allow you to decant your full-sized personal care products you use at home—from shampoo and sunscreen to serums and pills—into a labeled, modular system of hexagonal containers that are leak-proof, dishwasher safe, and stick together magnetically in your bag or on a countertop. No more jumbled, travel-sized toiletries and leaky, mismatched bottles and tubes.
Cadence Capsules have garnered some grumbling online for being overly heavy or leaking, but I’ve been using them regularly for about a year—I discuss decanting your daily-use products in my guide to How to Pack Your Beauty Routine for Travel—and haven’t experienced any leaks. They do add weight if you’re trying to travel super-light, and because they’re magnetic, they will also stick to other metal items in your toiletry bag, like bobby pins or other hair accessories. This can be annoying, especially if you’re already feeling chaotic or in a hurry.
Otherwise, Capsules are modular, convenient, and make you feel supremely organized—magnetic, interchangeable inserts for the lids come with permanent labels like “shampoo,” “conditioner,” “cleanser,” and “moisturizer.” Maybe you love this; maybe you don’t. But at least if you buy on Amazon, you can choose which label genre you get (Haircare, Bodycare, Skincare, Daily Routine). If this just isn’t your jam, the Cadence website offers a set of seven that allows you to customize the color and lid label of each Capsule, but that set is not currently on sale.
-
Fashion1 week agoSales at US apparel, clothing accessories stores up 4% YoY in Jan 2026
-
Entertainment1 week agoVal Kilmer revived 1 year after death through AI
-
Fashion1 week agoUS’ G-III Apparel’s FY26 sales fall 7% to $2.96 bn
-
Sports1 week agoMarch Madness 2026 – How to watch in SA, start time, schedule, TV channel for NCAA championship basketball tournament
-
Business1 week agoBrits cashing in jewellery as gold price hits record high
-
Fashion6 days agoChina’s textile & apparel exports surge 17% to $50 bn in Jan-Feb 2026
-
Business1 week agoWorld’s largest mining group names new chief executive
-
Fashion1 week agoSuez and Hormuz shut together, triggering global supply shock

