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基于化学机械传感的炸药蒸汽痕量检测与光学检测以及基于电子检测的电容传感的灵敏度比较。

Sensitivity comparison of vapor trace detection of explosives based on chemo-mechanical sensing with optical detection and capacitive sensing with electronic detection.

作者信息

Strle Drago, Štefane Bogdan, Zupanič Erik, Trifkovič Mario, Maček Marijan, Jakša Gregor, Kvasič Ivan, Muševič Igor

机构信息

Faculty for Electrical Engineering, University of Ljubljana, Tržaška 25, Ljubljana 1000, Slovenia.

Faculty for Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, Ljubljana 1000, Slovenia.

出版信息

Sensors (Basel). 2014 Jun 27;14(7):11467-91. doi: 10.3390/s140711467.

DOI:10.3390/s140711467
PMID:24977388
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4168507/
Abstract

The article offers a comparison of the sensitivities for vapour trace detection of Trinitrotoluene (TNT) explosives of two different sensor systems: a chemo-mechanical sensor based on chemically modified Atomic Force Microscope (AFM) cantilevers based on Micro Electro Mechanical System (MEMS) technology with optical detection (CMO), and a miniature system based on capacitive detection of chemically functionalized planar capacitors with interdigitated electrodes with a comb-like structure with electronic detection (CE). In both cases (either CMO or CE), the sensor surfaces are chemically functionalized with a layer of APhS (trimethoxyphenylsilane) molecules, which give the strongest sensor response for TNT. The construction and calibration of a vapour generator is also presented. The measurements of the sensor response to TNT are performed under equal conditions for both systems, and the results show that CE system with ultrasensitive electronics is far superior to optical detection using MEMS. Using CMO system, we can detect 300 molecules of TNT in 10(+12) molecules of N2 carrier gas, whereas the CE system can detect three molecules of TNT in 10(+12) molecules of carrier N2.

摘要

本文对两种不同传感器系统检测三硝基甲苯（TNT）炸药蒸汽痕量的灵敏度进行了比较：一种是基于微机电系统（MEMS）技术的化学修饰原子力显微镜（AFM）悬臂梁的化学机械传感器，采用光学检测（CMO）；另一种是基于具有梳状结构的叉指电极的化学功能化平面电容器电容检测的微型系统，采用电子检测（CE）。在这两种情况下（CMO或CE），传感器表面都用一层APhS（三甲氧基苯基硅烷）分子进行化学功能化，该分子对TNT的传感器响应最强。文中还介绍了蒸汽发生器的构造和校准。在相同条件下对两种系统进行了传感器对TNT响应的测量，结果表明，具有超灵敏电子设备的CE系统远远优于使用MEMS的光学检测。使用CMO系统，我们可以在10（+12）个氮气载气分子中检测到300个TNT分子，而CE系统可以在10（+12）个载气氮气分子中检测到3个TNT分子。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/b6d5fc3b0580/sensors-14-11467f19.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/b6d5fc3b0580/sensors-14-11467f19.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/86efe1f865d5/sensors-14-11467f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/592f299acc64/sensors-14-11467f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/458a2f309ff1/sensors-14-11467f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/3587c7ef7cfa/sensors-14-11467f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/d5d951bf3fb7/sensors-14-11467f12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/17834690e2d0/sensors-14-11467f13.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/23385fab53cc/sensors-14-11467f14.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/2f6a93b188bf/sensors-14-11467f15.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/b90334df8247/sensors-14-11467f16.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/5dc6b3d3db74/sensors-14-11467f17.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/694a17f635e8/sensors-14-11467f18.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c2ab/4168507/b6d5fc3b0580/sensors-14-11467f19.jpg

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