Linear Sensing Response to Ethanol by Indium Oxide Nanoparticle Layers
Figure 4
(a) Oxygen is physisorbed or chemisorbed onto indium oxide surface and takes away an electron from the conduction band, thus creating a depletion layer. This decreases the conductance of the indium oxide nanoparticle layer, and (b) in the presence of a reducing molecule the adsorbed oxygen is removed from the surface; this releases an electron into the conduction layer. This increases the conductance of the indium oxide nanoparticle layer.
