A passive terahertz (THz) microscope has been developed for sensitive imaging of spontaneous THz radiation. The THz microscope consisted mainly of a Ge objective lens, a confocal pinhole, Ge relay lenses, and a highly sensitive THz detector (Charge-Sensitive Infrared Phototransistor, CSIP). Then experimental examinations of the developed microscope were performed. First, THz signals, which were...

Photoformation of metalloporphyrin cations in a lipid bilayer increases the ionic currents of negative and decreases those of positive hydrophobic ions. At low concentrations of the mobile hydrophobic ion, a 30% change in conductivity is observed that decreases with increasing concentration of positive tetraphenylphosphonium ion and increases drastically with increasing concentration of negativ...

Turbidity is a physical property related to the scattering of light by particles that aresuspended in liquid. Commercial turbidimeters are priced at range hundreds tothousands dollars. Considering this scenario, it proposed work developmentof low-cost portable turbidimeter for monitoring turbidity processes. An infrared LEDwas used as emitter, and an phototransistor receiver. The signalprocessi...