Plasma-Like Negative Capacitance in Nano-Colloids
Abstract
A negative capacitance has been observed in a nano-colloid between 0.1 and 10-5 Hz. The response is linear over a broad range of conditions. The low-omega dispersions of both the resistance and capacitance are consistent with the free-carrier plasma model, while the transient behavior demonstrates an unusual energy storage mechanism. A collective excitation, therefore, is suggested.
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