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Using a graphene nanoribbon suspended over a trench, a team of researchers at the University of Science and Technology of China has discovered a link between the nanomechanical motion and conductance through a single-electron transistor (SET). This nano-electromechanical system (NEMS) exploits a gold gating contact in the bottom of the trench that is used to […]

Researchers in France have made the first ultra-compact laser diode that can be integrated with silicon photonic waveguides without losing its light-emitting efficiency. The device, which works at the important telecommunications wavelength of 1.56 µm, could be used for constructing optical networks at the sub-millimetre scale for intra-chip optical interconnects and signal processing…… http://nanotechweb.org/cws/article/tech/68585 The […]

Graphene, a sheet of carbon just one atom thick, has a number of unique electronic properties, so it is ideal for fundamental studies in condensed matter physics and for making novel electronics and sensing devices. Researchers normally study the electron transport properties of graphene by measuring the material’s resistivity but this approach cannot make out […]

Thin diamond-like photonic nanostructures strongly reflect a surprisingly broad range of colours in all directions, whatever the angle of incident light. This is the new finding from physicists and mathematicians at the University of Twente in The Netherlands who have studied the reflectivity of cubic diamond-like “inverse woodpile” crystals using numerical calculations. The structures, based […]

When it comes to synthesis, biology invariably trumps man-made efforts. As a result there is great interest in “synthetic biology”, which aims for synthetic procedures that mimic the selectivity and efficiency of natural systems, largely by enrolling enzymes to expedite reactions. Researchers at the US Naval Research Laboratory have now shed light on how these […]

Cancer is a complex disease to treat, and yet the operating principle of many current treatments is to simply kill healthy cells a little slower than cancerous ones. In response, scientists at The University of Electronic Science and Technology of China have developed a sophisticated nanoparticle-based treatment. Their theranostic nanoparticles carry an anti-cancer drug cargo, […]

Quantum dots have revolutionized the field of optoelectronics due to their atom-like electronic structure. However, the prospect of colloidal quantum-dot lasers has long been deemed impractical due to the high energies required to induce optical gain. But recent work published in Nature and led by Ted Sargent of the University of Toronto shows that the […]

Semiconductor nanowire lasers are promising ultracompact light sources for miniaturized optical processing and sensing, but their efficiency is limited by the difficulty of confining light in a structure much smaller than its wavelength. By using a silicon photonic crystal to trap light in a semiconductor nanowire, researchers at NTT Basic Research Laboratories in Japan have […]

Sensors made from carbon nanotubes could offer a superior alternative to current activity tracking technology. Devices developed at the University of California, San Diego, are flexible enough to bend within layers of fabric, and can track specific types of motion as well as recording vital signs such as temperature and heart rate. These developments are […]

Membranes made from single-layer graphene oxide (SLGO) are promising as molecular sieve materials for purifying water. A team of researchers from the University of South Carolina in the US has now found that the spacing between the graphene oxide layers in a membrane is important for how well water permeates through it. It has also […]

Single-photon sources based on solid-state quantum emitters, capable of operating at room temperature, could be employed in on-chip quantum computing applications and as a source of “flying” quantum bits (qubits) for quantum communication. Producing such emitters at precisely pre-defined positions is no easy task, however. Now, a team at the Massachusetts Institute of Technology (MIT) […]