Metal-organic frameworks are a new type of materials with nanoscale pores. Bioscience engineers have developed an alternative method that produces these materials in the form of very thin films, so that they can easily be used for high-tech applications such as microchips.
A new material that is both highly transparent and electrically conductive could make large screen displays, smart windows and even touch screens and solar cells more affordable and efficient, according to materials scientists and engineers who have discovered just such a material.
Combining photo-responsive fibers with thermo-responsive gels, researchers have modeled a new hybrid material that could reconfigure itself multiple times into different shapes when exposed to light and heat, allowing for the creation of devices that not only adapt to their environment, but also display distinctly different behavior in the presence of different stimuli.
To isolate the contribution of water to the vibrational fluctuations that occur between DNA, bulk water, and the charged biomolecular interface between the two, researchers have performed two-dimensional spectroscopic analyses on double-stranded DNA helices at different hydration levels.
Engineers have designed an atomic force microscope that scans images 2,000 times faster than existing commercial models. With this new high-speed instrument, the team produced images of chemical processes taking place at the nanoscale, at a rate that is close to real-time video.
Until now, little was known about how the doping molecules are integrated into the chemical structure of organic semiconductors. New research has found that they consist of a matrix of undoped crystallites in which such 'mixed crystallites' are embedded. It is this very species that takes over the role as the actually doping molecule.
By carefully tuning the chemical composition of a particular compound, researchers have created a 'topological crystalline insulator', whose bulk acts as an insulator but whose surface conducts electrical currents through a process that is related to the coupling between the motion and spin of electrons.