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Researchers in the UK, Germany, Thailand and Hong Kong say they have made nonlinear metasurfaces in which they can continuously control the phase of the material’s nonlinear polarization for the first time. Compared with conventional techniques to do this, such as “poling”, the new approach allows for complete manipulation of the nonlinear signal’s wavefront and […]

Two quantum dots have been used to generate an electrical current from voltage noise. The device was created by physicists in Germany, who say that it could lead to the development of systems that convert waste heat into useful energy……. http://nanotechweb.org/cws/article/tech/60966   Connect the dots: the energy-harvesting device

A new class of magnetic memory known as spin-transfer torque magnetic random-access memory (STT-MRAM) could act as a memristive device and be used to make a synaptic-like junction capable of “learning”, according to new experiments by researchers from the Université Paris-Sud and the CEA in France. The junction might be useful as a memory element […]

Researchers in Japan have made the world’s smallest-width graphene nanoribbons ever. The surface of the ribbons, which were grown inside single-walled carbon nanotubes, can be functionalized, making them suitable for a wide range of future nano-electronics and optoelectronics devices…….. http://nanotechweb.org/cws/article/tech/60972 In the lab

The nanoelectronics industry has invested substantially in efforts to produce vertically oriented gated nanowires, with aspirations to scale these up to forests of nanowire transistors. But fabricating just one gate on these tiny structures is fiddly, and the whole procedure must be repeated for each additional gate. Now researchers have flipped this protocol on its […]

Nanowerk News) The National Nanotechnology Initiative today published the proceedings of a technical interchange meeting on “Realizing the Promise of Carbon Nanotubes: Challenges, Opportunities, and the Pathway to Commercialization” (pdf), held at the National Aeronautics and Space Administration (NASA) Headquarters on September 15, 2014. This meeting brought together some of the Nation’s leading experts in […]

The body responds to graphene oxide in much the same way as it does to other biomaterial implant materials that are known to be safe. This is the new result from researchers at the Massachusetts Institute of Technology and Harvard Medical School who have undertaken a detailed study of how biocompatible the carbon nanostructure is…… […]

DNA can be used as a programmable ligand to build 2D and 3D supercrystals from metal nanoparticles. This is the new result from researchers at Northwestern University in the US who have assembled the crystals from the bottom-up and precisely engineered their optical properties by controlling the spacing between the nanoparticle building blocks. The crystals […]

Researchers in the Netherlands and Spain say that they have succeeded in experimentally mapping the density of charge trap states within the bandgap of a semiconducting quantum dot film for the first time. The new work shows that electrons are trapped close to the valence band in the material – a result that has been […]

Physicists at the CNRS and the Université Paris-Sud say they have observed the Hong-Ou-Mandel effect with atoms for the first time. This effect, first observed in an experiment nearly 30 years ago for photons, occurs when two individual but identical light particles enter the two arms of a “beam splitter” at the same time. The […]

A new type of magnetometer based on diamond impurities has been unveiled by physicists in the US. The device is about 1000 times more sensitive than previous diamond-based sensors because it uses an optical cavity to concentrate laser light in the vicinity of the impurities. Although the new device cannot yet reach the sensitivity of some […]

Nanoparticles could reduce inflammation in atherosclerotic plaques, according to new experiments by researchers in the US and the Netherlands. The nanoparticles, which target the white blood cells present in the plaques, could be used to treat patients that have had a heart attack or stroke…… http://nanotechweb.org/cws/article/tech/60803 Statin-loaded HDL nanoparticles reduce plaque inflammation

Researchers at the University of Montreal, Polytechnique Montréal and CHU Sainte-Justine have used magnetic nanoparticles to open the blood brain barrier and deliver chemical molecules directly into the brain. Although the technique has not yet been tested on humans, the research is important since 98% of modern-day therapeutics are unable to cross this barrier. The […]

A new carbon-foam-based catalyst for rechargeable zinc-air batteries that performs as well or better than most previously reported catalysts, including platinum/metal oxide-based ones. This is what researchers at Case Western Reserve University and the University of North Texas say they have made. The new carbon nanostructure, which is cheap, easy to make and environmentally friendly, […]