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In a roundup of the biggest tech breakthroughs of 2025, Forbes reporter Alex Knapp spotlights how MIT engineers developed magnetic transistors, a “discovery [that] could enable faster and more energy-efficient semiconductors.”

Researchers at MIT have developed microscopic devices that “can travel autonomously through the blood and provide electrical stimulation to precise brain regions,” and could one day be used to treat brain diseases, mental illness, or other parts of the body, reports Zoe Kriegler for Medical Design & Outsourcing. The development of microscopic wireless electronic devices (SWEDs) could “eliminate the need for brain surgery in some cases, decreasing the risk to the patient and the expense of the procedure by hundreds of thousands of dollars,” Kriegler explains. 

New York Times reporter Rebecca Elliott spotlights Phoenix Tailings, a startup co-founded by MIT alumni that is developing a sustainable process for refining rare-earth refining in the United States. Elliott notes that Phoenix Tailings created a closed-loop design for their manufacturing method that “distinguishes this process from the more energy-intensive techniques used in China, where workers scoop up molten metal with ladles.”

Prof. Deblina Sarkar speaks with Forbes reporter William A. Haseltine about her work developing “circulatronics,” microscopic electronics devices that could one day be used to help treat brain diseases. “What we have developed are tiny electronic devices that can travel through body fluids and autonomously find their target regions, with no external guidance or imaging,” explains Sarkar. “They provide very precise electrical stimulation of neurons without the need for surgery.” 

Researchers at MIT have developed a new physical model that can help “improve predictions of proton mobility across a wide range of metal oxides,” reports Ameya Paleja for Interesting Engineering. “This can help develop new materials and technologies powered by protons as charge carriers, rather than relying on lithium, which is widely used now,” explains Paleja. 

Lila Sciences, a startup co-founded by Prof. Rafael Gómez-Bombarelli, is developing new platforms aimed at enabling AI-driven laboratories to accelerate materials discovery for energy, sustainability, and computing, writes David Rotman for Technology Review. “If they succeed, these companies could shorten the discovery process from decades to a few years or less,” Rotman notes. 

Addis Energy, a startup co-founded by Prof. Yet-Ming Chiang is using the earth “as a chemical reactor to make ammonia in a cleaner way,” reports Alex Knapp for Forbes. The team identifies “rocky formations underground with large amounts of iron,” explains Knapp. “Then they inject those rocks with water, nitrogen and a chemical catalyst. That causes the oxygen in the water to bind with the iron in the rocks—making rust—freeing the hydrogen, which reacts with nitrogen to form ammonia.” 

MIT researchers have developed a “printable aluminum alloy that can withstand high temperatures and is five times stronger than traditionally manufactured aluminum,” reports Andrew Corselli for Tech Briefs. “The researchers envision that the new printable aluminum could be made into stronger, more lightweight and temperature-resistant products, such as fan blades in jet engines,” Corselli explains. 

In her forthcoming book, “Phenomenal Moments: Revealing the Hidden Science Around Us,” MIT Research Scientist and science photographer Felice Frankel encourages readers to search for science everywhere, while highlighting the beauty of science. The photographs “challenge readers to deduce the underlying chemical, natural, or physical processes at play.” 

Graduate student Chung-Tao (Josh) Chou speaks with Tech Briefs reporter Andrew Corselli about his work developing a magnetic transistor that could lead to more energy-efficient circuits. “People have known about magnets for thousands of years, but there are very limited ways to incorporate magnetism into electronics,” says Chou. “We have shown a new way to efficiently utilize magnetism that opens up a lot of possibilities for future applications and research.”

Researchers at MIT have developed magnetic transistors, “which could enable faster and more energy-efficient semiconductors,” reports Alex Knapp for Forbes. “Researchers have been trying to use magnets this way for years, but the materials used so far haven’t been optimal for computing functions,” explains Knapp. “That changed after experimenting with chromium sulfur bromide, which replaces the silicon in a conventional microchip and enables the transistors to be switched on and off with an electric current.” 

Researchers at MIT have developed a new self-assembling battery material that could help combat growing concerns about EV battery waste, reports Grace Snelling for Fast Company. The new method “makes it much easier to separate [battery] component parts, leaving them ready for recycling,” writes Snelling. 

Inspired by a scene in Harry Potter, researchers at MIT have developed a new self-assembling battery material that could one day serve as an “easy-to-recycle alternative for manufacturing EV batteries,” reports Gayoung Lee for Gizmodo. Notably, the process doesn’t require the harsh chemical and thermal conditions that make EV battery recycling so difficult, offering promising opportunities for recycling the batteries at scale.”

WBUR reporter Rachell Sanchez-Smith spotlights two health tech devices being developed by Prof. Yoel Fink and Prof. Canan Dağdeviren, respectively, that aim to “give the wearers — and their doctors — a clearer picture of their overall health.” Fink has created “a thread capable of storing data, running artificial intelligence algorithms, sensing motion and sound, and communication through Bluetooth,” while Dağdeviren’s wearable ultrasound scanner can be used to make breast cancer screening “more comfortable and more accurate,” explains Sanchez-Smith.  

Prof. Emeritus Donald Sadoway speaks with Forbes reporter Neil Winton about the development of solid-state batteries and the future of electric vehicles. “Yes, in 2035 the U.S. the automobile market will be roughly the same as today, but by then the massive demand for electricity from computers, AI and EVs will combine to demand more electricity than the grid can supply,” says Sadoway.