Nanotechnology, News, Physics

This is the first white light laser. It might change video display and lighting dramatically

Growth procedure of multi-segment heterostructure nanosheets. a, Schematic of the CVD set-up with a temperature gradient of 66 °C cm–1 in the region used for positioning the substrate (see Supplementary Section 5 for more details). b, Illustration of the growth procedure. Samples are grown starting at position R3, then at positions R1, R2 and finally back to R3, with corresponding temperatures labelled T1, T2 and T3. The associated product samples after these steps are labelled P3, P31, P312 and P3123, respectively, where the numbers following ‘P’ represent the growth sequence at various locations. For example, P312 represents a product grown first at R3, followed by growths at R1 and then at R2. c, Photoluminescence images of individual structures after the corresponding growth sequences. Note that the images were taken after the structures were transferred onto a glass substrate from their as-grown ones using a contact printing method. Inset in rightmost panel a multi-segment nanowire structure resulting from the P123 growth sequence. Scale bars, 15 μm. d, Optical images of the samples under ambient lighting. Scale bar, 1 cm. e, Photoluminescence spectra of the samples shown in c,d. Image: Nature

In what can only be heralded as a major breakthrough, a group at Arizona State University reports the demonstration of the first ever white laser – a laser that emits light over the full spectrum of visible colors. Up until now, lasers were designed to emit a distinct spectrum, either red, green, blue and so on. Combining multiple colors has always proved challenging and previous attempts had been slumped with shortcoming. This latest version seems to work wonderfully. If this technology can and will be scaled commercially, it could radically transform the industry. Its contrast and lighting capabilities, watt per watt, are well over LEDs and, moreover, it could help devise a new generation of Wi-Fi, called Li-Fi, which works on laser light and is 10 times faster.

Health & Medicine, Nanotechnology, News

Scientists find a way to transform cells into tiny lasers

An optical fibre is shown activating tiny lasers created within pig skin cells. Image credits: Matjaž Humar/Seok Hyun Yun

Scientists have created a mixture of oil and fluorescent dyes that can be safely added to human cells – the dye then gets activated by short pulses of light and starts behaving like a laser, communicating the tissue’s position to doctors. The technology could add new ways for light to be used in diagnosis and treatment medicine. The system was devised

Materials, Nanotechnology, News

Scientists predict the existence of a liquid analogue of graphene

Atomically thin two-dimensional liquid. Image credit: Pekka Koskinen.

By now, we’ve all hopefully at least heard of graphene, the new wonder material that promises to revolutionize a swarm of applications. But now, a team of researchers from Finland have predicted the existence of atomically thin, free-standing 2D liquid phase – a liquid analogue of graphene.

Mind & Brain, Nanotechnology, News

Scientists create neural lace that fuses with your brain

The rolled electronic mesh is injected through a glass needle into a water-based solution. (Lieber Research Group, Harvard University)

In a world where in only a few decades we moved from clunky phones to wireless satellite-connected devices that allow you to be anywhere and do anything on the internet, it seems only normal that scientists will take it to the next level – to your brain. Already tested on mice, this fine mesh fits inside a syringe and unfurls on the brain to monitor its activity.

Inventions, Nanotechnology, News

Gold Nanospirals Might Protect Your Identity

World's smallest spirals could guard against identity theft | Research News @ Vanderbilt

Microscopic swirls from gold might be the key to protect your cash and credit cards in the future, making identity theft virtually impossible. Researchers at Vanderbilt University developed the “Archimedes spirals” and report that they produce four times more blue light per unit volume than currently existing frequency amplifiers; they could be printed on currency, ID cards and pretty much everything that’s important to prevent counterfeiting.

Health & Medicine, Inventions, Nanotechnology, News

Nanotech toothbrush means you never need toothpaste again

misoka_17

It’s common sense – in order to brush your teeth, you need water, a toothbrush, and toothpaste. Well, a company from Japan wants to change all that: they’ve developed a nanotechnology toothbrush that basically eliminates the need for toothpaste.

Nanotechnology, News, Technology

Artificial leaf breakthrough makes solar fuels one step closer

artificial-leaf-cc543

A team at Caltech has devised a new film coating that facilitates catalysis and electron transfer in a solar powered system that splits water into hydrogen and oxygen, which can be used as fuels. Such a system is also called an artificial leaf or solar-fuel generator because in many ways it mimics the process which plants use to convert sunlight and CO2 into oxygen and fuel (sugars, carbohydrates). The researchers make note, however, that they’re still a long way from making it commercial viable, but these sort of updates are inspiring.

Nanotechnology, News

Laser-etching pattern turns any metal into a super-hydrophobic surface

Super hydrophobic surface

A new generation of water-repellent products could be just ahead after researchers at University of Rochester demonstrated an amazing laser technique that etches tiny micro and nano grooves into a metal surface making it super-hydrophobic.

Nanotechnology, News, Technology

Superconductive nanowire hybrid fuses semiconductor and metal with atomic precision

Thomas Sand Jespersen and Peter Krogstrup, here seen in the laboratorie at the Center for Quantum Devices, Niels Bohr Institute, where the research in nanowire crystals are taking place. The nanowire crystals may lie the foundation for future electronics, such as quantum computation and solar cells. Credit: University of Copenhaga

A novel type of nanowire crystals was demonstrated by researchers at the University of Copenhagen that can fuse together both semiconductor and metallic materials with atomic precision at their interface. This way, nanowires and their electrical contacts have been fused in one hybrid material which might lay the foundation for the next generation of semiconductor electronics. A perfect fit In the

Nanotechnology, News, Technology

‘Pop-up’ method makes 3-D complex nano structures from 2-D, similar to a children’s book

Various examples of flower-like structures formed from a two-dimensional structure transferred onto a stretched elastic material. Credit: University of Illinois

Researchers at Northwestern University and the University of Illinois at Urbana-Champaign recently demonstrated a new technique for building complex and very fine 3D micro and nano structures out of 2-D shapes. The whole process is very similar to how a children’s pop-up book works, starting as a flat 2D surface only to expand into a 3D shape when prompted. The authors note that the pop-up method has various advantages over 3D printing, including use of multiple materials during the fabrication process and integration with electronics.