금속산화물 나노구조체를 이용한 화학저항식 가스센서의 최신 연구동향 = Introduction to Metal Oxide Nanostructures and Their Application to Chemoresistive Gas Sensors

다국어 초록 (Multilingual Abstract)

In the modern era, advanced industrial and process technologies in various fields are known toproduce harmful gases. These gases typically leak at low concentrations, but continuous exposure can causeserious harm to health and safety. Since human sensory organs cannot detect these risks or leaking hazardousgases, there has been significant interest in developing high-performance gas sensors capable of rapidlydetecting harmful and hazardous gas leaks. Metal oxides possess several advantages for such applications,including ease of manufacturing, affordability, and high sensitivity to harmful gases. In this review, wehighlight recent progress in the field of chemo-resistive gas sensors based on metal-oxide nanostructures. Itbegins by discussing the features of various nanostructure morphologies such as 0-dimensional nanospheresto nanocomposites of nanowires. It then describes methods for fabricating metal-oxide nanostructures. Finally,we describe recent advances in the design and fabrication of nanostructures for metal-oxide gas sensors usingfour different morphologies: 0-dimensional (0 D, nanosphere and nanoparticle), 1-dimensional (1 D, nanowireand nanorod), 3-dimensional (3 D, nanoflower and nanocomposite), and heterojunctions. Based on theirmorphology-dependent sensing properties, there are various fields of application for gas sensors, with differenttarget gases. This review can serve as an overview of recent research trends and offer insights into the futuredevelopment of next-generation high-performance gas sensors.