• 文献标题:   Flexible Strain Sensor Based on Layer-by-Layer Self-Assembled Graphene/Polymer Nanocomposite Membrane and Its Sensing Properties
  • 文献类型:   Article
  • 作  者:   ZHANG DZ, JIANG CX, TONG J, ZONG XQ, HU W
  • 作者关键词:   graphene, layerbylayer selfassembly, nanocomposite film, strain sensor
  • 出版物名称:   JOURNAL OF ELECTRONIC MATERIALS
  • ISSN:   0361-5235 EI 1543-186X
  • 通讯作者地址:   China Univ Petr East China
  • 被引频次:   4
  • DOI:   10.1007/s11664-017-6052-1
  • 出版年:   2018

▎ 摘  要

Graphene is a potential building block for next generation electronic devices including field-effect transistors, chemical sensors, and radio frequency switches. Investigations of strain application of graphene-based films have emerged in recent years, but the challenges in synthesis and processing achieving control over its fabrication constitute the main obstacles towards device applications. This work presents an alternative approach, layer-by-layer self-assembly, allowing a controllable fabrication of graphene/polymer film strain sensor on flexible substrates of polyimide with interdigital electrodes. Carboxylated graphene and poly (diallyldimethylammonium chloride) (PDDA) were exploited to form hierarchical nanostructure due to electrostatic action. The morphology and structure of the film were inspected by using scanning electron microscopy, x-ray diffraction and Fourier transform infrared spectroscopy. The strain-sensing properties of the graphene/PDDA film sensor were investigated through tuning micrometer caliper exertion and a PC-assisted piezoresistive measurement system. Experimental result shows that the sensor exhibited not only excellent response and reversibility behavior as a function of deflection, but also good repeatability and acceptable linearity. The strain-sensing mechanism of the proposed sensor was attributed to the electrical resistance change resulted from piezoresistive effect.