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Nanoscale


— Science

“Mini Lisa” demonstrates potential of nanomanufacturing technique

Arguably the world’s most famous painting, da Vinci's Mona Lisa has now been copied onto the world’s smallest canvas at the Georgia Institute of Technology. Associate Professor Jennifer Curtis' "Mini Lisa" is one-third the width of a human hair, with details as small as one-eighth of a micron. Mini Lisa demonstrates the flexibility of a new nanolithography technique that can vary the surface concentration of molecules on very small portions of a substrate. Read More
— Science

Unlocking color mechanism of peacock’s feathers could lead to next-gen color displays

Structural color, which is the foundation that makes things like a peacock's tail feathers appear iridescent, has been an area of study for scientists as they try to adapt it for use in everyday technologies – only without the “rainbow effect” that makes the colors unstable depending on the angle of view. Now, Researchers at the University of Michigan have mimicked the peacock's color mechanism in an approach that could lead to high resolution reflective color displays and have implications for data storage, cryptography and counterfeiting. Read More
— Science

Fruit-inspired fibers change color when stretched

Materials scientists at Harvard University and the University of Exeter have invented a new class of polymer fibers that change color when stretched. As is often seen in nature, the color is not the result of pigments, but rather comes from the interference of light within the multilayered fiber. Inspired by Margaritaria nobilis – also known as the Bastard Hogberry – the new fibers may lead to new forms of sensors, and possibly to smart fabrics whose color changes as the fabric is stretched, squeezed, or heated. Read More
— Science

"Superomniphobic" nanoscale coating repels almost any liquid

A team of engineering researchers at the University of Michigan has developed a nanoscale coating that causes almost all liquids to bounce off surfaces treated with it. Consisting of at least 95 percent air, the new "superomniphobic" coating is claimed to repel the broadest range of liquids of any material in its class, opening up the possibility of super stain-resistant clothing, drag-reducing waterproof paints for ship hulls, breathable garments that provide protection from harmful chemicals, and touchscreens resistant to fingerprint smudges. Read More
— Science

X-ray microscope delivers unparalleled nanoscale images in 3D

A new X-ray microscope at Brookhaven National Laboratory is being used to create unparalleled high-resolution 3D images of the inner structure of materials. Using techniques similar to taking a very small-scale medical CAT (computer-assisted tomography) scan, the full field transmission x-ray microscope (TXM) enables scientists to directly observe structures spanning 25 nanometers - three thousand times smaller than a red blood cell - by splicing together thousands of images into a single 3D X-ray image with "greater speed and precision than ever before." This capability is expected to power rapid advances in many fields, including energy research, environmental sciences, biology, and national defense. Read More
— Electronics

World's first ultra-thin, low energy molybdenite microchip tested

Back in February, Darren Quick wrote about the unique properties of Molybdenite and how this material, previously used mostly as a lubricant, could actually outshine silicon in the construction of transistors and other electronic circuits. In brief: it's much more energy efficient than silicon, and you can slice it into strips just three atoms thick - meaning that you can make transistors as much as three times smaller than before, and make them flexible to boot. Well, the technology has now been proven with the successful testing of the world's first molybdenite microchip in Switzerland. Does this mean Lausanne will become known as "Molybdenite Valley?" Read More
— Science

Quantum dots delivered to cell nucleus with a nanoneedle

We recently saw the potential for nanoneedles and quantum dots to treat skin cancer, however researchers at the University of Illinois have gone one step further. They have created a nanoneedle (an incredibly small needle) that allows them to peak into the nucleus of a cell. When subjected to an electrical charge, the needle injects quantum dots into the nucleus of a living cell. These quantum dots (nanoscale crystals with unique properties in terms of light emission) can be used to monitor microscopic processes and cellular conditions, aid the diagnosis of disease, and track genetic information from within the nucleus. Read More
— Environment

Nanoscale solar cells absorb 10 times more energy than previously thought possible

Research has already shown that at the nanoscale, chemistry is different and the same is apparently true for light, which Engineers at Stanford University say behaves differently at scales of around a nanometer. By creating solar cells thinner than the wavelengths of light the engineers say it is possible to trap the photons inside the solar cell for longer, increasing the chance they can get absorbed, thereby increasing the efficiency of the solar cell. In this way, they calculate that by properly configuring the thicknesses of several thin layers of films, an organic polymer thin film could absorb as much as 10 times more energy from sunlight than predicted by conventional theory. Read More
— Materials

Localized heating could be the key to mass-producing graphene nanocircuits

Scientists from the Georgia Institute of Technology have documented a major breakthrough in the production of nanocircuitry on graphene, a material that many envision as the successor of silicon for our electronics needs. Using thermochemical nanolithography (TCNL), the team found that the electrical properties of reduced graphene oxide (rGO) can be easily tuned to reliably produce nanoscale circuits in a single, quick step. Read More
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