Impedance spectroscopy characteristics of nano ZnO doped liquid crystal/polymer film

Q3 Engineering

光电工程 Pub Date : 2020-09-17 DOI:10.12086/OEE.2020.190540

Zhu Qing, Li Yourong, Jiang Zhipeng, Zheng Jihong

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Abstract

In this paper, the electrical impedance spectroscopy characteristics of polymer dispersed liquid crystal (PDLC) doped with nano-zinc oxide rods and its sensing applications are studied. Polymer dispersed liquid crystal films have the characteristics of stable structure, resistance to mechanical impact and easy preparation. By doping nano-zinc oxide rods into the material, the sensing function of polar molecules such as ethanol gas can be realized through the analysis of electrical impedance spectroscopy. In this paper, the complex impedance spectra of thin films encountering ethanol molecules are studied and analyzed through comparative experiments. In addition, the electrochemical equivalent circuit was established and analyzed. It was found that the film could sensitively and effectively realize the sensing function of the ethanol molecules. The sensitivity and response time of the sensor are further analyzed and studied. The experimental study and analysis show that nano-zinc oxide rod doped PDLC film is expected to be used as a gas sensor for detecting polarity of ethanol and other materials. It has the advantages of high sensitivity, stable structure, high repeatability, and easy fabrication.

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纳米ZnO掺杂液晶/聚合物薄膜的阻抗谱特性

本文研究了纳米氧化锌棒掺杂聚合物分散液晶(PDLC)的电阻抗谱特性及其传感应用。聚合物分散液晶膜具有结构稳定、抗机械冲击、制备方便等特点。通过在材料中掺杂纳米氧化锌棒，可以通过电阻抗谱分析实现对乙醇气体等极性分子的传感功能。本文通过对比实验，对薄膜遇到乙醇分子时的复阻抗谱进行了研究和分析。建立并分析了电化学等效电路。实验结果表明，该膜能灵敏、有效地实现乙醇分子的传感功能。对传感器的灵敏度和响应时间进行了进一步的分析和研究。实验研究和分析表明，纳米氧化锌棒掺杂的PDLC薄膜有望用作检测乙醇等材料极性的气体传感器。它具有灵敏度高、结构稳定、重复性高、制作方便等优点。

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来源期刊

光电工程 Engineering-Electrical and Electronic Engineering

CiteScore

2.00

自引率

0.00%

发文量

6622

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