Room-temperature oxygen sensitivity of ZnS nanobelts

Abstract

Room-temperature oxygen sensing is realized from individual ZnS nanobelts. Under UV illumination the current through ZnS nanobelt increases from 0.265to2.26nA as the oxygen pressure decreases from 1×105to3×10−3Pa. The conductance of ZnS nanobelt exhibits a logarithmic dependence on oxygen pressure, which is in agreement with theoretical prediction. The sensing is based on the enhanced modulation of ZnS nanobelts conductance by adsorbed oxygen under illumination. These results demonstrate an approach to in situ precisely detect oxygen at room temperature.

Structural, spectral and electrical properties of green synthesized ZnS nanoparticles using Elaeocarpus floribundus leaf extract

“…This process leads to a depletion layer near the nanoparticle surface due to the n-type ZnS nanoparticle [45] and result in a low value of dark current. When the sample is exposed to light electron-hole pairs are generated as a result of absorption of photon.…”

Ultralong Single‐Crystalline Ag2S Nanowires: Promising Candidates for Photoswitches and Room‐Temperature Oxygen Sensors

“…[7][8][9] Furthermore, the optical properties of nanowires are fairly sensitive to their surroundings, for example, the oxygen concentration, opening up other potential applications in oxygen sensors. [10] Silver sulfide (Ag 2 S) is a direct, narrow-bandgap semiconductor with good chemical stability and excellent optical limiting properties, as well as an unusual solid ionic conductor that operates at room temperature and conducts both electrons and ions. [11][12][13] It has significant applications in optical and electronic devices such as photoconductors, photovoltaic cells, and superionic conductors.…”

Prominent ethanol sensing with Cr2O3 nanoparticle-decorated ZnS nanorods sensors

“…However, reports on ZnS nanostructures-based gas sensors are very few compared to that of metal oxide semiconductor nanostructures-based gas sensors [1][2][3][4][5].…”

“…In particular, ZnS can be applied to the fabrication of ultraviolet (UV) light sensors and gas sensors. Over the past decade, the following ZnS nanostructure based gassensors have been reported: a ZnS single nanobelt sensor for H2 sensing [1], ZnS nanobelt sensors for H2 sensing [2], ZnS microsphere sensors for O2 sensing [3], ZnS nanowire sensors for acetone and ethanol sensing [4], ZnS nanotube array sensors for humidity sensing [5].…”