Physical properties of the poly-vanadium-molybdenum acid xerogels

Electrical properties of hydrated vanadium compounds

“…Therefore it is clear that the total conductivity also depends on humidity conditions of the environment. The results of similar investigations are described in [36][37][38][39][40][41][42][43]. The dependences of the bulk conductance G on the relative humidity at 286 K are shown in Fig.…”

“…However, it is shown that for the hopping conductivity, which takes place in the xerogels, the values of the Hooge constant are close to 1 [24], that allows to speak about a higher concentration of the carriers. The first data on the concentration and mobility of carriers of a current for vanadium hydrated compounds are presented in [25][26][27] where from three independent experiments -the measurements of the frequency dependences of the conductivity (G) and capacity (C) of the polyvanadium-molybdenum acid thin films, the investigations of the Cole-Cole diagrams, and the measurements of the time dependences of the transitive currents I(t) -the mobility of carriers along (µ = ) and across (µ ) the V-O layers have been determined. The results are summarized in Table 2.…”

“…when T = const, are 0.045 (% RH) −1 for V-Mo and 0.031 (% RH) −1 for V-Ti xerogels [37][38][39][40][41][42]. The bulk resistance of vanadium xerogels depends on the relative humidity ϕ as an exponential function [36][37][38][39][40][41][42][43]…”

“…Carrier mobility in polyvanadium-molybdenum acid xerogels along (µ=) and across (µ ) the V-O layers[25][26][27].…”

Electrical and optical properties of highly oriented nanocrystalline vanadium pentoxide

“…These results of the concentration of the charge carriers, N, may be compared with the published data for similar gel [19].…”