Acceptor-compensated charge transport and surface chemical reactions in Au-implanted SnO₂ nanowires.

ABSTRACT: A new deep acceptor state is identified by density functional theory calculations, and physically activated by an Au ion implantation technique to overcome the high energy barriers. And an acceptor-compensated charge transport mechanism that controls the chemical sensing performance of Au-implanted SnO2 nanowires is established. Subsequently, an equation of electrical resistance is set up as a function of the thermal vibrations, structural defects (Au implantation), surface chemistry (1 ppm NO2), and solute concentration. We show that the electrical resistivity is affected predominantly not by the thermal vibrations, structural defects, or solid solution, but the surface chemistry, which is the source of the improved chemical sensing. The response and recovery time of chemical sensing is r

SUBMITTER: Katoch A 

PROVIDER: S-EPMC3980318 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature