An international team of researchers led by the University of Tokyo has discovered a new material which, when rolled into a nanotube, generates an electric current if exposed to light. If magnified and scaled up, say the scientists, the technology could be used in future high-efficiency solar devices.
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It’s the most complex integration of carbon nanotube-based CMOS logic so far, with nearly 15,000 transistors, and it was done using technologies that have already been proven to work in a commercial chip-manufacturing facility. The processor, called RV16X-NANO, is a milestone in the development of beyond-silicon technologies, its inventors say.
Unlike silicon transistors, nanotube devices can easily be made in multiple layers with dense 3D interconnections. The Defense Advanced Research Projects Agency is hoping this 3D aspect will lead to commercial carbon nanotube (CNT) chips with the performance of today’s cutting-edge silicon but without the high design and manufacturing cost.
Some of the same researchers created a modest one-bit, 178-transistor processor back in 2013. In contrast, the new one, which is based on the open source RISC-V instruction set, is capable of working with 16-bit data and 32-bit instructions. Naturally, the team, led by MIT assistant professor Max Shulaker, tested the chip by running a version of the obligatory “Hello, World!” program. They reported the achievement this week in Nature.
Aug. 27 (UPI) — Built-in night vision may not be far off. Scientists have developed nanoparticles that allow mice to see near-infrared light.
Researchers are scheduled to describe the technological breakthrough on Tuesday at 12:30 p.m. ET at the American Chemical Society’s fall meeting, held this week in San Diego. Their presentation will be streamed live online.
“When we look at the universe, we see only visible light,” lead researcher Gang Han, a material scientists and biochemist at the University of Massachusetts Medical School, said in a news release. “But if we had near-infrared vision, we could see the universe in a whole new way. We might be able to do infrared astronomy with the naked eye, or have night vision without bulky equipment.”
Carbon isn’t just the stuff life is made of—it’s also the stuff our future is being built on.
Carbon—a versatile element that frequently trades off its electrons to create various forms of itself—has been gaining an exciting reputation in tech thanks to the successful exfoliation of graphene, a sheet of carbon that’s just one atom thick and has remarkable chemical properties.
But carbon nanotubes, a sort of cousin to graphene, has been quietly staking out its own place in the world of materials science.
Astronauts would have to fly their rocket into the Spaceline, attach to a solar-powered shuttle and be dragged up to the Moon.
Carbon nanotubes will need to be built on a large scale for the design.
Zephyr Penoyre, one of the Columbia astronomy graduate students behind the Spaceline, told Futurism: The line becomes a piece of infrastructure, much like an early railroad.
Scientists at MIT built a 16-bit microprocessor out of carbon nanotubes and even ran a program on it, a new paper reports.
Silicon-based computer processors seem to be approaching a limit to how small they can be scaled, so researchers are looking for other materials that might make for useful processors. It appears that transistors made from tubes of rolled-up, single-atom-thick sheets of carbon, called carbon nanotubes, could one day have more computational power while requiring less energy than silicon.
“This work is particularly exciting because carbon nanotubes are one of the most promising supplements in the future of beyond-silicon computers,” Max Shulaker, the study’s corresponding author and assistant professor at MIT, told Gizmodo.
One of the most difficult challenges in treating the brain cancer glioblastoma is that few drugs can pass through the blood-brain barrier. Scientists at Cedars-Sinai in Los Angeles have developed a system to circumvent this hurdle—one that combines a powerful immuno-oncology drug with a polymer-based delivery vehicle that can cross the blood-brain barrier.
The researchers showed that this “nano-immunotherapy” treatment crossed the blood-brain barrier in mouse models of glioblastoma, and that it stopped tumor cells from multiplying. They published their findings in the journal Nature Communications.
The Cedars-Sinai team used the polymer scaffold to deliver two types of immune checkpoint inhibitors, blocking either CTLA-4 or PD-1. When injected into the bloodstream of mice, the drugs quickly infiltrated brain tumors, but not healthy brain tissue, the researchers reported.
Movies featuring heroes with superpowers, such as flight, X-ray vision or extraordinary strength, are all the rage. But while these popular characters are mere flights of fancy, scientists have used nanoparticles to confer a real superpower on ordinary mice: the ability to see near-infrared light. Today, scientists report progress in making versions of these nanoparticles that could someday give built-in night vision to humans.
The researchers will present their results at the American Chemical Society (ACS) Fall 2019 National Meeting & Exposition.
“When we look at the universe, we see only visible light,” says Gang Han, Ph.D., the project’s principal investigator, who is presenting the work at the meeting. “But if we had near-infrared vision, we could see the universe in a whole new way. We might be able to do infrared astronomy with the naked eye, or have night vision without bulky equipment.”
A gene called Lipocalin 2 is a major culprit in triple-negative breast cancer, an aggressive form of the disease for which there are few effective, targeted treatments. A team of researchers at Boston Children’s Hospital has developed an innovative way to knock out the gene using the editing system CRISPR and has shown its potential for treating triple-negative breast tumors in mice.
But to make CRISPR work in breast tumors, the researchers had to figure out a way to deliver the technology into breast cancer cells without using a virus or something else that might cause off-target side effects. So they encapsulated it in nanoparticles and targeted it at ICAM-1, a molecule expressed on breast cancer cells.
The encapsulated CRISPR system knocked out Lipocalin 2 with 81% efficiency in tumor samples, and when injected into mouse models of triple-negative breast cancer, it slowed tumor growth by 77%. The researchers reported the results in the journal Proceedings of the National Academy of Sciences.
