Bismuth nanowires have intriguing electronic and energy-harvesting application possibilities. However, fabricating these materials with high quality and in large quantities is challenging. Researchers have now demonstrated a new technique to produce single- crystal nanowires atop arbitrary substrates, including glass, silicon, and metal, when an intermediate layer of vanadium is present.
Scientists describe a novel protocol to obtain different types of nanostructures from a single helical polymer and certain metal salts. An outstanding characteristic of these macromolecules is that their helicity can be tuned by the action of diverse external stimuli such as temperature, polarity or metal ions. Consequently, these polymers act as sensors.
The LICARA guidelines are geared towards small and medium-sized enterprises from all branches of industry, and help weigh up the pros and cons of nanomaterials and make decisions on their use. The guidelines also do their bit towards efficient communication in the value added chain.
Researchers describe the successful implementation of imaging techniques that will allow scientists to identify molecules and map their locations to areas smaller than a micron. The team demonstrated the technique with natural samples, including a sample from the Murchison meteorite and a cometary dust grain (Iris) from NASA's Stardust mission.
Scientists have devised the first detailed model to quantify what they believe was the last unknown characteristic of film formation through deposition by vacuum sublimation and chemical vapor deposition.
The Structure of Paramagnetic Aggregates from Colloidal Emulsions (InSPACE) series of experiments on the International Space Station explored nanoparticles suspended in Magnetorheolocial (MR) fluids - a type of smart fluid that tends to self-assemble into shapes in the presence of a magnetic field.
As part of a project demonstrating new 3-D printing techniques, researchers have embedded tiny light-emitting diodes into a standard contact lens, allowing the device to project beams of colored light.
Researchers have created flexible, patterned sheets of multilayer graphene from a cheap polymer by burning it with a computer-controlled laser. The process works in air at room temperature and eliminates the need for hot furnaces and controlled environments, and it makes graphene that may be suitable for electronics or energy storage.
Precious elements such as platinum work well as catalysts in chemical reactions, but require large amounts of metal and can be expensive. However, computational modeling below the nanoscale level may allow researchers to design more efficient and affordable catalysts from gold.