Figure 3.

AFM measurement. (a) C-AFM measurement setup. (b) I-V curve measured by conductive AFM tip on the top of SnO2 nanobelt top surface. (c) Fitted lnI versus V curve at positive and negative bias voltages.

Wang et al. Nanoscale Research Letters 2011 6:541   doi:10.1186/1556-276X-6-541
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