Semiconductor nanochannels in metallic carbon nanotubes by thermomechanical chirality alteration

Abstract: "Carbon nanotubes have a helical structure wherein the chirality determines whether they are metallic or semiconducting. Using in situ transmission electron microscopy, we applied heating and mechanical strain to alter the local chirality and thereby control the electronic properties of individual single-wall carbon nanotubes. A transition trend toward a larger chiral angle region wa... » read more

Manufacturing Bits: March 16

Tripping up neural networks For years, Russia has been an active area in R&D. In one example, Russia's Skolkovo Institute of Science and Technology (Skoltech) has demonstrated how certain patterns can cause neural networks to make mistakes in recognizing images. Leveraging the theory behind this research, Skoltech can design defenses for pattern recognition systems that are vulnerable t... » read more

Manufacturing Bits: Sept. 22

Hairy nanoparticles The U.S. Air Force Research Laboratory is developing a new type of material called preceramic polymer-grafted nanoparticles or “hairy nanoparticles” (HNP). HNPs can be used to manufacture a new class of aircraft parts made of ceramic composite materials. An HNP is a hybrid material. It is based on a polymer shell, which is bound to a nanoparticle core, according to t... » read more

Manufacturing Bits: Jan. 16

Coherent X-ray imaging Russia’s National University of Science and Technology MISIS has developed a non-destructive way to observe the inner structures of photonic crystals. The technology, called ptychographic coherent X-ray imaging, obtains the electron density of colloidal crystals. Ptychography is a lensless, X-ray coherent imaging technique. Others are also working on the techno... » read more