Gas-sensitive coatings based on zinc oxide nanorods were synthesized by a low-temperature hydrothermal method. It was shown that the synthesis of nanorods significantly increases the sensitivity of the samples to isopropyl alcohol vapors. Zinc oxide nanorods are promising for practical application in semiconductor adsorption gas sensors.

The development of novel nanophotonic devices and circuits necessitates studies of optical phenomena in nanoscale structures. Catalyzed semiconductor nanowires are known for their unique properties including high crystallinity and silicon compatibility making them the perfect platform for optoelectronics and nanophotonics. In this work, we explore numerically optical properties of gallium phosphide nanowires governed by their dimensions and study waveguiding, coupling between the two wires and resonant field confinement to unveil nanoscale phenomena paving the way for the fabrication of the integrated optical circuits. Photonic coupling between the two adjacent nanowires is studied in detail to demonstrate good tolerance of the coupling to the distance between the two aligned wires providing losses not exceeding 30% for the gap of 100 nm. The dependence of this coupling is investigated with the wires placed nearby varying their relative position. It is found that due to the resonant properties of a nanowire acting as a Fabry–Perot cavity, two coupled wires represent an attractive system for control over the optical signal processing governed by the signal interference. We explore size-dependent plasmonic behaviors of the metallic Ga nanoparticle enabling GaP nanowire as an antenna-waveguide hybrid system. We demonstrate numerically that variation of the structure dimensions allows the nearfield tailoring. As such, we explore GaP NWs as a versatile platform for integrated photonic circuits.

Low-temperature solution methods for the synthesis of the materials based on zinc oxide nanorods were investigated in this paper. Narrow-band semiconductors were deposited on ZnO nanorods to form a heterojunction. The morphology, composition and activation energy of the obtained samples were investigated. Their photocatalytic activity was also tested in experiments on the methyl orange decomposition under UV radiation and visible (white) light.