Nano-assembled thin film gas sensors. I. Ammonia detection by a porphyrin-based multilayer film
Nano-assembled thin film gas sensors. I. Ammonia detection by a porphyrin-based multilayer film
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DOI：
10.4024/30603.jbpc.06.03
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发表时间：
2006-01-01
期刊：
影响因子：
--
通讯作者：
Kunitake, Toyoki
中科院分区：
文献类型：
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作者：
Korposh, Serhiy O.;Takahara, Naold;Kunitake, Toyoki
采用逐层法沉积的一种卟啉薄膜作为光学传感器的有源元件。研究了这种薄膜技术和由此得到的纳米尺度基质在检测挥发性有机化合物(VOCs)、芳香烃和含胺物质方面的有效性。该传感原理是基于监测四(4-磺基苯基)卟啉(TSPP)和聚二烯丙基二甲基氯化铵(PDDA)层之间的静电相互作用中分析物引起的700 nm处Q带的光学变化。制备了三种不同厚度的薄膜样品，考察了薄膜厚度对灵敏度的影响。对于氨，传感器在0-100ppm的浓度范围内表现出线性灵敏度，传感器响应在30秒内。传感器的响应可以通过在蒸馏水中漂洗来再生。
A thin film of porphyrin deposited by the layer-by-layer method is employed as the active element for an optical sensor. The usefulness of this film technology and the resulting nanoscale matrix for the detection of volatile organic compounds (VOCs), aromatics and amine-containing substances has been studied. The sensing principle is based on monitoring the optical changes of the Q band at 700 nm, as induced by the analyte in the electrostatic interaction between tetrakis(4-sulfophenyl)porphine (TSPP) and poly(diallyldimethylammonium chloride) (PDDA) layers. Three thin film samples with different thicknesses were prepared to assess the effect of film thickness on the sensitivity. For ammonia, the sensor shows a linear sensitivity in the concentration range 0-100 ppm and the sensor response was within 30 seconds. Sensor response could be regenerated by rinsing in distilled water.