灵活的,全有机化学电阻器用于检测化学攻击性蒸汽
Srikanth Ammu1, Vineet Dua, Srikanth Rao Agnihotra
1Department of Chemical Engineering, University of Massachusetts Lowell , Lowell, Massachusetts 01854, United States.
Journal of the American Chemical Society
|February 25, 2012
概括
在纸上使用碳纳米管 (CNT) 膜的新型化学电阻在室温下检测有害的二氧化和蒸气. 这些强大,喷墨打印的传感器提供可靠的性能,不需要额外的设备.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学传感器 化学传感器
背景情况:
- 单壁碳纳米管 (CNT) 是气体传感器的有希望的材料,因为它们具有独特的电气特性.
- 在室温下开发强大而灵敏的用于氧化蒸汽的传感器仍然是一个挑战.
研究的目的:
- 在纤维素基板上开发和描述基于单壁碳纳米管 (CNT) 膜的化学电阻.
- 评估这些传感器在环境条件下检测激烈的氧化蒸汽的性能.
主要方法:
- 在纸张和布料基板上使用喷墨印刷制造CNT捆的薄膜.
- 在室温下测试化学电阻对二氧化和的反应,以每亿分之一 (ppb) 的水平.
- 评估传感器的强度,信号恢复,基线漂移,以及在机械应力 (曲) 下的性能.
主要成果:
- 化学电阻检测到二氧化在250ppb和在500ppb.
- 在无酸纸上喷墨印刷的CNT薄膜表现出优越的强度,与塑料上的浸涂薄膜相比.
- 传感器表现出较低的变化,自发的信号恢复,可以忽略的基线漂移,并在纹后保持性能.
结论:
- 基于纤维素的CNT化学电阻对于在环境空气中低度检测危险的氧化蒸汽是有效的.
- 喷墨印刷提供了一种可行的方法,可以在柔性基板上创建强大的高性能CNT气体传感器.
- 这些传感器为便携式和可穿戴式气体检测应用提供了一个有前途的平台.
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