Figure 6.

Capacitance-voltage relation of the GO and control devices. The negative-bias data could not be obtained due to the large accumulation currents of our devices. The shift of the GO curve as compared to the control curve may be due to the negative interface charge (or oxide charge) of GO.

Lin et al. Nanoscale Research Letters 2012 7:343   doi:10.1186/1556-276X-7-343
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