Abstract

Planar nanocomposite structures comprising poly(vinyl alcohol) films with dispersed multiwall carbon nanotubes (MWCNTs) deposited on silicon substrates and provided with aluminum contacts possess rectification properties and have asymmetric nonlinear current–voltage characteristics. Forward-biased nanocomposite structures exhibit a positive temperature coefficient of resistance (TCR) in a temperature interval of 270–350 K, whereas analogous PVA film structures without MWNTs have negative TCR values. Under reverse bias, the structures with MWNTs exhibit TCR with a sign changing from negative to positive. The observed behavior is explained in terms of the tunneling current transfer mechanism.

中文翻译：

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硅基板上具有分散多壁碳纳米管的PVA薄膜中的电流传输特性

摘要

平面纳米复合结构包括聚乙烯醇薄膜和沉积在硅基板上的分散多壁碳纳米管（MWCNT），并具有铝触点，具有整流特性，并具有不对称的非线性电流-电压特性。前向偏置的纳米复合材料结构在270–350 K的温度区间内显示出正的电阻温度系数（TCR），而不含MWNT的类似PVA薄膜结构的TCR值为负。在反向偏压下，具有MWNT的结构表现出TCR，其符号从负变为正。根据隧道电流传输机制解释了观察到的行为。