Yan Long, Zhang Yu, Zhang Tieqiang, Feng Yi, Zhu Kunbo, Wang Dan, Cui Tian, Yin Jingzhi, Wang Yiding, Zhao Jun, Yu William W
State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University , Changchun 130012, China.
Anal Chem. 2014 Nov 18;86(22):11312-8. doi: 10.1021/ac5030478. Epub 2014 Nov 4.
Multigas sensing is highly demanded in the fields of environmental monitoring, industrial production, and coal mine security. Three near-infrared emission wavelengths from PbSe quantum dots (QDs) were used to analyze the concentration of three gases simultaneously through direct absorption spectroscopy, including acetylene (C2H2), methane (CH4), and ammonia (NH3). The corresponding lower detection limits for the three gases were 20, 100, and 20 ppm, respectively, with an accuracy of 2%. This study demonstrates that QDs with tunable emissions have great potential for simultaneous and uninterfered multiplex gas analysis and detection due to the advantages of the easy tunability of multiplex emitting wavelengths from QDs.
多气体传感在环境监测、工业生产和煤矿安全等领域有很高的需求。利用PbSe量子点（QDs）的三个近红外发射波长，通过直接吸收光谱法同时分析三种气体的浓度，这三种气体包括乙炔（C2H2）、甲烷（CH4）和氨（NH3）。这三种气体相应的最低检测限分别为20、100和20 ppm，准确度为2%。本研究表明，由于量子点多路发射波长易于调谐的优点，具有可调谐发射的量子点在同时进行且不受干扰的多路气体分析和检测方面具有巨大潜力。
