Temperature dependence of electrical conductance in a single porous SnO 2 nanoribbon

Abstract

Porous SnO 2 nanoribbons, with their width and thickness of around 20µm and 20nm, respectively, have been fabricated from the metallo-organic dimethyldineodecanoate tin using electrospinning and thermal decomposition techniques. The electrical conductance of one synthesized single ribbon has been measured using the two-probe method in atmosphere following a cycle of heating from 300 to 660K and subsequent cooling from 660K to 300K. During the heating, the conductance, G is not so sensitive to the temperature below 380K and, above that, follows an Arrhenius relation with a thermal activation energy of 0.918±0.004 eV until 660K; upon cooling, G follows the same Arrhenius relation until 570K and, below that, observes another Arrhenius relation with its activation energy decreasing to 0.259±0.006eV down to 300K. After a cycle of heating and cooling, G returns to a value higher than its initial one. The Arrhenius relations are attributed to the surface adsorption and desorption of moisture and oxygen, and the G hysteresis between 300 and 380K is attributed to the partial replacement of adsorbed oxygen by moisture because of the porous nature of the surface.

Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles

“…Several studies of SnO 2 doping with different metals to produce nanocrystals have been reported in recent years. [35][36][37] Sn 4? can be easily reduced to Sn 2?…”