Electrochemical deposition of ZnO nanostructures onto porous silicon and their enhanced gas sensing to NO2 at room temperature

Controlled growth of ZnO nanorod arrays via wet chemical route for NO2 gas sensor applications

“…Hence, NO 2 adsorption increases the resistance of the ZnO material. The NO 2 that is adsorbed acts as an acceptor in accordance with the following reversible process [25]. NO 2 (gas) + e¯ (CB)  NO 2¯ (adsorption) NO 2 (gas) + O 2¯ (adsorption) + 2e¯  NO 2 ¯ (adsorption) + 2O¯ (adsorption) Figures 5 and 6 show the variation in the sensitivity of the ZnO nanorod samples exposed to NO 2 gas at different concentrations and temperature.…”

Synthesis and oxygen vacancy related NO2 gas sensing properties of ZnO:Co nanorods arrays gown by a hydrothermal method

“…10). Then, when the air was let in, NO can readily dissociate into O − and some bound electrons were released [50] (Eqs. (5)(6)(7)(8) shown in Fig.…”

Fabrication of nanocomposites based on silicon nanowires and study of their optical properties

“…The a-Si formation can be explained by crystalline modifications at the etching time increase. 3.3 ZnO/SiNWs nanocomposite Nanocomposite materials based on ZnO and Si nanostructures are promising for their sensing [18] and optoelectronic [19] applications. SiNWs array is a convenient material for ZnO deposition because of their developed surface area and good adsorption properties.…”