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標題: | 以奈米金單層膜保護團簇塗佈於堆疊式電極結構之揮發性有機化合物氣體感測器 A Volatile Organic Compound Sensor Employing Monolayer-Protected Gold Nanoclusters Coated on Stacked Electrodes |
作者: | Cheng-Yi Chang 張正義 |
指導教授: | 田維誠 |
關鍵字: | 氣體感測器,揮發性有機化合物,奈米金單層膜保護團簇,堆疊式電極,互補式金氧半微機電製程, gas sensor,volatile organic compounds (VOCs),monolayer-protected gold nanoclusters (MPNs),stacked electrodes,CMOS MEMS process, |
出版年 : | 2013 |
學位: | 碩士 |
摘要: | 本研究開發了新穎的揮發性有機化合物氣體微感測器,其特徵在於堆疊式電極結構,並以奈米金單層膜保護團簇(Monolayer-protected gold nanoclusters, MPNs)作為有機氣體感測材料。堆疊式電極結構之製作是以晶片中心0.35 μm CMOS MEMS製程為基礎,設計了堆疊式指叉狀電極與堆疊式格狀電極兩種結構。使用的奈米金單層膜保護團簇為辛硫醇官能化奈米金粒子(Octanethiol-functionalized gold nanoparticles, Au-C8),並以噴灑Au-C8二氯甲烷溶液的方式塗佈於堆疊式電極上。
此感測器具有良好的感測效能,於氣體生成系統檢測中,感測器的偵測濃度範圍廣(50-5000 ppm)、反應迅速、再現性佳,且感測器反應與氣體濃度成線性關係。堆疊式指叉狀電極感測器對甲苯、正辛烷和正丁醇的靈敏度為27.4 ppm/ppm、33.5 ppm/ppm和21.7 ppm/ppm,而偵測極限分別為15 ppm、14 ppm和20 ppm;堆疊式格狀電極感測器對甲苯、正辛烷和正丁醇的靈敏度為133.5 ppm/ppm、211.4 ppm/ppm和92.3 ppm/ppm,偵測極限分別為13 ppm、8 ppm和21 ppm。 本研究亦示範將堆疊式格狀電極感測器應用於氣相層析系統,可成功辨識八種待測有機氣體,且感測器反應程度亦與有機氣體質量成線性關係。感測器對甲苯、正辛烷和乙酸正丁酯的靈敏度為為5.97 ppm/ng、6.17 ppm/ng和3.08 ppm/ng,而偵測極限分別為1.91 μg、1.85 μg和3.71 μg。本研究開發的揮發性有機化合物氣體微感測器具有反應迅速、靈敏度高、再現性佳等優點,且可作為氣相層析系統偵測器,故具有整合於微型化氣相層析系統的潛力。 In this research, a novel volatile organic compound (VOC) sensor featured with stacked electrodes coated with monolayer-protected gold nanoclusters (MPNs) was demonstrated. Two patterns of electrodes, stacked interdigitated electrodes and stacked grid electrodes, were proposed and fabricated by CIC 0.35 μm CMOS MEMS process. The employed MPNs were octanethiol-functionalized gold nanoparticles (Au-C8) and were coated on the stacked electrodes by airbrushing Au-C8 dichloromethane solution. When tested using a gas generation system, the sensor had a wide dynamic range from 50 to 5000 ppm, and the response was fast, repeatable, and linearly dependent of the gas concentration. The sensitivities of the sensor with stacked interdigitated electrodes for toluene, octane and butanol were 27.4, 33.5 and 21.7 ppm/ppm, respectively, and the corresponding detection limits were 15, 14 and 20 ppm. The sensitivities of the sensor with stacked grid electrodes for toluene, octane and butanol were 133.5, 211.4 and 92.3 ppm/ppm, respectively, and the corresponding detection limits were 15, 14 and 20 ppm. The sensor with stacked grid electrodes was also employed as a gas chromatograph (GC) detector. The sensor could identify eight selected VOCs, and the response was linearly dependent of the mass of analyte. The sensitivities for toluene, octane and butyl acetate were 5.97, 6.17 and 3.08 ppm/ng, respectively, and the corresponding detection limits were 1.91, 1.85 and 3.71 μg. With the features of fast response, high sensitivity and good repeatability, the sensor showed its potential for integration in a micro GC. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/62236 |
全文授權: | 有償授權 |
顯示於系所單位: | 電子工程學研究所 |
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