An Inexpensive, Single Use Carbon-Based Sensor for the Rapid and Early Detection of Hydrocarbon Leaks,ACS Sensors

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An Inexpensive, Single Use Carbon-Based Sensor for the Rapid and Early Detection of Hydrocarbon Leaks
ACS Sensors ( IF 8.2 ) Pub Date : 2017-06-14 00:00:00 , DOI: 10.1021/acssensors.7b00112
H. Bri Sebastian ₁ , Robert M. Mayall ₁ , Roberto J. Pilonieta ₁ , Steven L. Bryant ₁

Affiliation

A novel fabrication process for a single use, low-cost organic solvent sensor has been developed. The process is simple, and the materials are readily available. Carbon nanomaterials are self-assembled at a water/hexane interface, where the hexane phase contains dissolved paraffin wax. Upon the controlled evaporation of hexane, the paraffin wax precipitates, trapping the carbon nanoparticles at the surface in a paraffin wax backbone, realizing a carbon-nanoparticle-decorated film. The film is hydrophobic and highly electrically conductive. When exposed to hydrocarbons or a mixture of hydrocarbons, the conductive carbon network deteriorates and an increase in film resistivity is monitored. The rate of change in resistivity is proportional to the concentration and composition of organic molecules in contact with the film.

中文翻译：

廉价，一次性使用的基于碳的传感器，可快速及早地检测出碳氢化合物泄漏

已经开发了一种用于单次使用的低成本有机溶剂传感器的新颖制造工艺。该过程很简单，并且材料容易获得。碳纳米材料在水/己烷界面处自组装，其中己烷相包含溶解的石蜡。在己烷的受控蒸发下，石蜡沉淀出来，将碳纳米颗粒捕集在石蜡骨架中的表面，从而获得了碳纳米颗粒修饰的膜。该膜是疏水的并且是高度导电的。当暴露于碳氢化合物或碳氢化合物的混合物中时，导电碳网络会变质，并且可以监测膜电阻率的增加。电阻率的变化率与与膜接触的有机分子的浓度和组成成正比。

更新日期：2017-06-15

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