Akbari-Saatlu Mehdi, Procek Marcin, Mattsson Claes, Thungström Göran, Nilsson Hans-Erik, Xiong Wenjuan, Xu Buqing, Li You, Radamson Henry H
Department of Electronics Design, Mid Sweden University, Holmgatan 10, SE-85170 Sundsvall, Sweden.
Department of Optoelectronics, Silesian University of Technology, 2 Krzywoustego St., 44-100 Gliwice, Poland.
Nanomaterials (Basel). 2020 Nov 6;10(11):2215. doi: 10.3390/nano10112215.
The unique electronic properties of semiconductor nanowires, in particular silicon nanowires (SiNWs), are attractive for the label-free, real-time, and sensitive detection of various gases. Therefore, over the past two decades, extensive efforts have been made to study the gas sensing function of NWs. This review article presents the recent developments related to the applications of SiNWs for gas sensing. The content begins with the two basic synthesis approaches (top-down and bottom-up) whereby the advantages and disadvantages of each approach have been discussed. Afterwards, the basic sensing mechanism of SiNWs for both resistor and field effect transistor designs have been briefly described whereby the sensitivity and selectivity to gases after different functionalization methods have been further presented. In the final words, the challenges and future opportunities of SiNWs for gas sensing have been discussed.
半导体纳米线，特别是硅纳米线（SiNWs）独特的电子特性，对于各种气体的无标记、实时和灵敏检测具有吸引力。因此，在过去二十年中，人们为研究纳米线的气敏功能付出了巨大努力。这篇综述文章介绍了与SiNWs在气体传感应用方面的最新进展。内容首先从两种基本合成方法（自上而下和自下而上）开始，讨论了每种方法的优缺点。之后，简要描述了SiNWs在电阻器和场效应晶体管设计中的基本传感机制，进一步介绍了不同功能化方法后对气体的灵敏度和选择性。最后，讨论了SiNWs在气体传感方面面临的挑战和未来机遇。
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