Aa. Petrov et al., Changes of the thermally oxidized porous silicon conductivity induced by adsorption and electric field, PHYS LOW-D, 7-8, 1999, pp. 1-7
Thermal oxidation of porous silicon was demonstrated to reduce drastically
the adsorption sensitivity of the porous layer conductivity. Considerable i
ncrease of the conductivity of silicon-oxidized porous silicon-metal struct
ures placed in water or ethanol vapor under forward voltage has been observ
ed. The effect was attributed to the modulation of conductivity of non-oxid
ized cores of porous silicon wires by the mobile ion charge drifting along
the oxide surfaces.