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基于石墨烯的透明柔性应变计具有可调节的灵敏度和应变范围

Joseph Neilson^1,2, Pietro Cataldi^1,3, Brian Derby¹

¹Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.

ACS applied nano materials

|December 14, 2023

概括

在灵活的膜上,减少氧化石墨烯 (rGO) 的透明导电薄膜作为张力计. 在rGO薄膜制造过程中定制裂纹结构可以控制电子皮肤等应用的灵敏度和应变范围.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
灵活的电子灵活的电子

背景情况:

石墨烯氧化物 (GO) 可以组装成透明的导电膜.
在柔性基板上的减少氧化石墨烯 (rGO) 薄膜为可穿戴电子产品提供了潜力.
在传感应用中,rGO膜的破裂可以诱导压电阻.

研究的目的:

开发基于破裂的减少氧化石墨烯薄膜的透明和灵活的张力计.
为了研究制造条件对rGO拉伸仪性能的影响.
为了证明这些张力计在e-skin中的应用.

主要方法:

在接口上组装GO单层,在聚二甲基 (PDMS) 膜上形成膜.
在受控条件下 (30秒和60秒) 使用酸 (HI) 蒸汽将GO减少为rGO.
通过预训练诱导rGO膜的裂,并描述它们的压电阻反应.

主要成果:

30秒的减速产生了并行裂纹,从而产生了可用范围>0.2的应变量表和20-100.00的尺度因子 (GF).
减少60秒创建的穿越裂,导致更高的GF (800-16,000),但减少了可用的应变范围 (<0.01).
一个电阻模型解释了观察到的行为,测量仪表表现出高达1kHz的稳定响应,检测到人体菌株.

结论:

基于rGO的张力计的灵敏度和应变范围可以通过在制造过程中控制薄膜的裂纹结构来调整.
这些灵活,透明的张力计对可穿戴电子产品和电子皮肤的应用非常有希望.
开发的 rGO 抗变量计为敏感和稳定的抗变量检测提供了一个可行的平台.

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