An Optical Vapor Sensor Based on Amphiphilic Block Copolymer Langmuir–Blodgett Films
An Optical Vapor Sensor Based on Amphiphilic Block Copolymer Langmuir–Blodgett Films
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DOI：
10.1109/jsen.2018.2833491
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发表时间：
2018-07
影响因子：
4.3
通讯作者：
Y. Acikbas;F. Taktak;R. Çapan;C. Tuncer;V. Bütün;M. Erdogan
中科院分区：
文献类型：
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作者：
Y. Acikbas;F. Taktak;R. Çapan;C. Tuncer;V. Bütün;M. Erdogan
本文采用含聚[N，N-（二甲氨基）甲基丙烯酸乙酯]嵌段的两亲性嵌段共聚物作为化学传感器材料。将两亲嵌段共聚物Langmuir-Blodgett （LB）薄膜制备在镀金玻璃、石英晶体和石英玻璃基底上，制备薄膜化学传感器元件。利用原子力显微镜、石英晶体微天平、紫外可见光谱和表面等离子体共振（SPR）技术对所有共聚物LB薄膜进行了表征。在石英晶体上沉积的物质，每层的频移分别为4258.01 ng /层（16.06 ng mm−2）和188.07 Hz /层。利用Winspall软件对所有实验SPR数据进行了拟合，并对该共聚物LB薄膜的膜厚进行了评价。测得LB薄膜的折射率为1.63±0.02 nm，单层厚度为1.46±0.07 nm。两亲嵌段共聚物LB薄膜化学传感器元件暴露于二氯甲烷、氯仿、苯和甲苯蒸气中。SPR动力学测量表明，饱和二氯甲烷蒸汽的光电探测器响应变化较大，其响应值为0.081 au，恢复时间为3.5 s /响应时间为4.5 s。两亲嵌段共聚物LB薄膜化学传感器元件对饱和二氯甲烷蒸气具有良好的灵敏度和选择性。
Amphiphilic block copolymers containing poly [N,N-(dimethylamino)ethyl methacrylate] block was used as a chemical sensor material in this paper. The amphiphilic block copolymer Langmuir–Blodgett (LB) thin films were prepared onto a gold-coated glass, quartz crystal and quartz glass substrates to fabricate a thin film chemical sensor element. Atomic force microscopy, quartz crystal microbalance, UV-visible spectroscopy, and surface plasmon resonance (SPR) techniques were used to characterize all the copolymer LB thin films. The mass deposited onto a quartz crystal and the frequency shifts per layer were found to be 4258.01 ng per layer (16.06 ng mm−2) and 188.07 Hz per layer, respectively. Using Winspall software, all experimental SPR data were fitted and the film thickness of this the copolymer LB thin film can be evaluated. The refractive index and thickness per monolayer of LB films were determined as 1.63±0.02 nm and 1.46±0.07 nm, respectively. Amphiphilic block copolymer LB thin film chemical sensor element was exposed to dichloromethane, chloroform, benzene, and toluene vapors. The SPR kinetic measurements showed that the photodetector response change, $\Delta I_{\text {rf}}$ for saturated dichloromethane vapor is much larger than the other vapors with the $\Delta I_{\text {rf}}$ value of 0.081 au and with 3.5-s recovery time/4.5-s response time. It can be proposed that amphiphilic block copolymer LB thin film chemical sensor element has a good sensitivity and selectivity for saturated dichloromethane vapor.