Researchers at Cornell University have developed a novel quantitative nanoparticle-based sensor of chemical concentrations based on organic dye molecules covalently integrated into the matrix of silica nanoparticles. This is the first work that implements an optimized core-shell architecture for such sensor particles.
Humidity is a measure of the moisture content of an environment. Control of humidity is thus essential for maintaining the desired level of moisture in an enclosure be it in a hospital or in a semiconductor-processing unit or in a laboratory. For humidity control an efficient sensor is an absolute necessity.
Researchers in Switzerland succeeded in the large-scale production of carbon-coated copper nanoparticles. These carbon/copper nanocomposites could be used as novel, low-cost sensor materials and offer a metal-based alternative to the currently used brittle oxidic spinels or perovskites.