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Category: nanotechnology – Page 299

UCLA’s new method to smaller molecule machines.

UCLA nanoscience researchers have determined that a fluid that behaves similarly to water in our day-to-day lives becomes as heavy as honey when trapped in a nanocage of a porous solid, offering new insights into how matter behaves in the nanoscale world.

“We are learning more and more about the properties of matter at the nanoscale so that we can design machines with specific functions,” said senior author Miguel García-Garibay, dean of the UCLA Division of Physical Sciences and professor of chemistry and biochemistry.

The research is published in the journal ACS Central Science.

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Mechanically stacked two-dimensional Van-der-Waals heterostructures have been engineered to devise Terahertz frequency nano-detectors by using a flake of black phosphorus (BP) trapped between two layers of hexagonal boron nitride (hBN).

An international collaboration between researchers from Italy, USA, France and Poland brought together the benefits of heterostructure architecture and the potential of 2D layered nanomaterials to build THz photon sensors that operate over the 0.3−0.65 THz range, at low temperatures, with excellent signal to noise ratio values. They accomplished this by reassembling the thin isolated atomic planes of hexagonal borum nitride (hBN) with a few layer phosphorene (black phosphorus (BP)) in mechanically stacked hBN/BP/hBN heterostructures.

Artificial semiconductor heterostructures have an important role in modern electronic and photonic technologies, due to their effectiveness for manipulation and control of carriers from the visible to the THz range. Even though they are incredibly versatile, they usually require challenging production procedures due to the need of clean and abrupt interfaces. These characteristics are a major challenge for having high-efficiency devices at room temperature like source, detectors or modulators, especially in the far-infrared. With the emergence of two-dimensional (2D) layered materials, like graphene and phosphorene, as reliable, flexible and versatile alternatives for detectors operating at THz with low signal to noise ratio, this challenge was finally overcome.

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Doctors have long dreamed of delivering drugs to specific parts of your body, and they may soon have a clever way to do it: fish. UC San Diego researchers have developed nanoscale metallic fish (they’re just 800 nanometers long) that could carry medicine into the deeper reaches of your bloodstream. Each critter has a gold head and tailfin, as well as a nickel body joined by silver hinges. You only have to subject them to an oscillating magnetic field to make them swim — there’s no need for propellers or a passive (read: slow) delivery system. That, in turn, could make the drug carriers smaller even as they move quickly.

The technology definitely has its flaws. It’s not currently biodegradable, so you may be stuck with this school of fish unless there’s a way to flush them out. Gold and silver aren’t the cheapest metals, either. Scientists are working on biodegradability, however, and they’re hopeful that it will be useful for more than just guiding drugs. You could use to control individual cells, for example, or conduct certain forms of non-invasive surgery. It may just be a matter of refining the technique before you can get medicine exactly where you need it.

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Nice.

Crocus Technology, a leading developer of Tunneling Magnetoresistive Sensors (TMR) based on proprietary and patented Magnetic Logic Unit (MLU) technology, announces the availability of the CT51x digital switch, the first in a series of fully integrated digital sensors the company has launched. This family of devices accommodates a wide range of applications with larger air gaps, smaller magnetic fields, and significantly lower power consumption. The CT51x enables high-accuracy position detection, control and power switching functions with high sensitivity and reliability that system designers demand for the IoT, consumer and industrial applications.

“With ever increasing demand for intelligent sensing in smart products, the CT51x family of devices offers design-in flexibility and cost-savings for existing and emerging applications: IoT, wearables, appliances, smart meters, intelligent smart locks and other consumer products,” said Zack Deiri, Chief Sales and Marketing Officer at Crocus Technology. “The market is gravitating towards intelligent solid-state magnetic switches that provide higher reliability, faster frequency response, and extremely low power consumption for battery-powered applications in a smaller form factor, such as the CT51x.”

When used as a proximity switch, the CT51x can detect window or door movement in intrusion alarm systems and appliances. The digital switch can also activate wake-up and sleep modes in mobile devices such as laptops with lid open/closed detection with extremely low power consumption. The CT51x also measures rotation speed in battery-powered smart flow meters and can act as a safeguard against tampering in smart utility meters where annual losses surpass a billion dollars.

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Many bacteria possess molecular spear guns, which they fire at enemies and rivals, thus putting them out of action. The tips of these nano-spear guns, known as Type VI secretion system (T6SS), are loaded with toxic molecules that lead to death of their adversaries. However, sometimes close related bacteria come under fire. The team of Prof. Marek Basler, infection biologist at the Biozentrum of the University of Basel, has shown for the first time, that in contrast to their enemies the harpooned sister cells actually profit from the attack: After a T6SS injection, they are able to reuse specific proteins to produce their own spear guns. Thus the related bacterial strains help each other to enlarge their arsenal of weapons and to fight their competitors.

Bacteria harpoon their opponents — and their allies.

The T6SS is firmly attached to the bacterial cell envelop. The tiny spear with a sharp tip is surrounded by a flexible sheath. “When bacteria fire their spear guns, the sheath rapidly contracts in just a few milliseconds and ejects the spear out of the cell into by-standing bacteria,” says Basler describing the mechanism. “The attackers then recycle the harpoon proteins remaining in the cell.” In this maneuver, the bacteria also hit related bacterial strains that do the same as the attackers: They disassemble the harpoon into their protein components and reuse these for new T6SS assembly.

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Scientists at the University of Wisconsin-Madison have shown for the first time that transistors fashioned out of carbon nanotubes are actually twice as efficient as regular silicon varieties. This comes after decades of research regarding how carbon nanotubes can be used to design the next generation of computers. Speaking about the breakthrough, recently published in the Science Advances journal, Michael Arnold, a member of the team, said:

Making carbon nanotube transistors that are better than silicon transistors is a big milestone. This achievement has been a dream of nanotechnology for the last 20 years.

Since its discovery back in 1991, these one-atom-thick carbon tubes have been the focus of much scientific research. Its incredibly unique properties, experts believe, could pave the way for more efficient computing devices that at the same time consume significantly less power. Measuring nearly 50,000 times smaller than the width of a single human hair, this wonder material is made up of hexagonally arranged carbon atoms.

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Worried that AI’s one day could make us their pets Elon Musk is teasing a new brain-hacking tech

There’s no doubting that Elon Musk is one busy guy. Whether he’s trying to land on Mars with SpaceX, running Tesla, buying SolarCity, investing in the future of AI, building Giga factories or throwing out Hyperloop concepts for fun but it’s increasingly apparent that he’s giving a huge amount of thought to the day when advanced AI’s become the most intelligent form of “life” on the planet.

With the advances that we are already seeing in AI it’s inevitable that one day – sooner rather than later humans will, comparatively speaking, be as intelligent to an AI as pets are to us today. To that end, the billionaire polymath has revealed he may be working on something called a “Neural Lace”, a nanotechnology based device that you can think of as being a digital upgrade for your brain. Human intelligence combined with the power of AI – a digital layer directly overlaid onto the brains cortex.

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Ray Kurzweil is a futurist, a director of engineering at Google and a co-founder of the Singularity University think tank at NASA Ames Research Center in Mountain View. He is a nonfiction author and creator of several inventions.

Kurzweil met with the Silicon Valley Business Journal to discuss how technology’s exponential progress is rapidly reshaping our future through seismic shifts in information technology and computing power, energy, nanotechnology, robotics, health and longevity.

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NICE.

Scientists at the Swiss Nanoscience Institute, the University of Basel, and the University Hospital Basel have developed and have been testing a device that can screen people with malignant melanoma for a spcific genetic mutation. About half of malignant melanoma cases involve the BRAF gene that results in rapid cell division and drugs targeting this type of cancer are available. The problem is that without knowing if a patient exhibits the mutation, it is dangerous to prescribe the medications since they will not work and will only cause additional problems.

The new device was used to analyze malignant melanoma tissue samples and to find whether the relevant genetic sequence is present. It relies on microscopic cantilevers, some of which have a coating to which the particular genetic sequence sticks to. Other cantilevers have a coating without the sequence. RNA isolated from the biopsy samples was then introduced into the device and the molecules that stuck to the cantilevers made them bend. This bending can be detected, pointing to the presence of the searched for mutation.

The whole process, from when the biopsy is taken to when the result is produced, can be done within a day and appropriate therapy administered right after.

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