Smartphone-Based VOC Sensor Using Colorimetric Polydiacetylenes
Smartphone-Based VOC Sensor Using Colorimetric Polydiacetylenes
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DOI：
10.1021/acsami.7b18121
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发表时间：
2018-02-07
影响因子：
9.5
通讯作者：
Kim, Jong-Man
中科院分区：
文献类型：
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作者：
Park, Dong-Hoon;Heo, Jung-Moo;Kim, Jong-Man
由于聚二乙炔(PDA)在环境刺激下具有独特的比色特性(通常是从蓝到红)，因此在化学传感器系统中得到了积极的应用。我们开发了一种高精度、简单的挥发性有机化合物(VOC)传感器系统，可以使用传统智能手机进行操作。该过程开始于使用喷墨打印四个相应的二乙炔在常规纸张上形成四个不同的PDA的阵列，然后进行光聚合。然后，根据4种PDA对11种有机溶剂的不同溶致变色反应，建立了颜色变化(即红色和色调值)的数据库。将PDA阵列暴露在未知溶剂中会促进颜色变化，这些颜色变化是使用智能手机摄像头拍摄的，并使用应用程序进行分析。通过将11种溶剂的颜色变化与数据库进行比较，这款智能手机应用程序可以100%准确地识别未知溶剂。此外，还证明了PDA阵列传感器具有足够的灵敏度，可以准确地检测11种VOC气体。
Owing to a unique colorimetric (typically blue-to-red) feature upon environmental stimulation, polydiacetylenes (PDAs) have been actively employed in chemosensor systems. We developed a highly accurate and simple volatile organic compound (VOC) sensor system that can be operated using a conventional smartphone. The procedure begins with forming an array of four different PDAs on conventional paper using inkjet printing of four corresponding diacetylenes followed by photopolymerization. A database of color changes (i.e., red and hue values) is then constructed on the basis of different solvatochromic responses of the 4 PDAs to 11 organic solvents. Exposure of the PDA array to an unknown solvent promotes color changes, which are imaged using a smartphone camera and analyzed using the app. A comparison of the color changes to the database promoted by the 11 solvents enables the smartphone app to identify the unknown solvent with 100% accuracy. Additionally, it was demonstrated that the PDA array sensor was sufficiently sensitive to accurately detect the 11 VOC gases.