Point-of-use robotic sensors for simultaneous pressure detection and chemical analysis
Point-of-use robotic sensors for simultaneous pressure detection and chemical analysis
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DOI：
10.1039/c8mh01412d
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发表时间：
2019-03-01
影响因子：
13.3
通讯作者：
Ng, Tse Nga
中科院分区：
文献类型：
--
作者：
Amit, Moran;Mishra, Rupesh K.;Ng, Tse Nga
在过去几年中，用于监测安全和环境应用中的危险材料的传感器的开发一直在增加。特别是，有机磷对健康构成严重威胁，影响到粮食和农业工业。因此，非常需要对这些化学品进行快速现场检测，特别是通过远程机器人采样，以最大限度地减少人类接触这些危险化学品的机会。为了处理样本收集，机器人操纵器需要触觉反馈，以确保不会由于过度的力而对机器人或其他接触对象造成损坏。为了提供触觉反馈，这里选择了基于电容机制的多孔聚二甲基硅氧烷压力传感器，并与有机磷酸盐化合物（例如甲基对氧磷）专用的酶基电化学传感器集成。这导致混合物理化学传感手套可以同时测量压力和化学目标，而两个传感器之间不会产生干扰。我们的压力传感器显示出每10 kPa施加压力>55%的相对电容变化，在3-20 kPa范围内的平均灵敏度（S）为0.057 +/- 0.004 kPa（-1），在10 - 20 kPa范围内的最大灵敏度为0.30 +/- 0.08 kPa（-1）。
The development of sensors for monitoring hazardous materials in security and environmental applications has been increasing in the last few years. In particular, organophosphates pose a serious health threat that affects the food and agriculture industries. Hence, their rapid on-site detection is highly desired, especially through remote robotic sampling that can minimize the exposure of humans to these hazardous chemicals. To handle sample collection, a robotic manipulator requires tactile feedback, to ensure that no damage will be done to either the robot or the other object in contact due to excessive force. To provide tactile feedback, porous polydimethylsiloxane pressure sensors based on a capacitive mechanism were chosen here, and integrated with enzyme-based electrochemical sensors specific for organophosphate compounds (e.g. methyl paraoxon). This results in a hybrid physical-chemical sensing glove that can simultaneously measure the pressure and chemical target without interference between the two sensors. Our pressure sensors showed >55% relative capacitance change per 10 kPa applied pressure, with an average sensitivity (S) of 0.057 +/- 0.004 kPa(-1) in the 3-20 kPa range and a maximum sensitivity of 0.30 +/- 0.08 kPa(-1) in the