UV-assisted fluctuation-enhanced gas sensing by ink-printed MoS devices.

In this work, MoS flakes were printed on ceramic substrates and investigated toward 1-10 ppm of nitrogen dioxide (NO), 2-12 ppm of ammonia (NH), and 2-12 ppm acetone (CHO) under UV light (275 nm). The structure of overlapping MoS flakes and UV light assistance affected high responsivity to NO when DC resistance was monitored, and superior sensitivity to NH was obtained from the low-frequency noise spectra. MoS exhibited response and recovery times in hundreds of seconds and stability throughout the experiments conducted within a few months.

Plasmon-enhanced photoluminescence from TiO and TeO thin films doped by Eu for optoelectronic applications.

In this work we study the luminescence properties of europium-doped titanium dioxide and tellurium oxide thin films enhanced by gold plasmonic nanostructures. We propose a new type of plasmon structure with an ultrathin dielectric film between plasmonic platform and luminescent material. Plasmonic platforms were manufactured through thermal annealing of the gold thin film.