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β-Ga_(2)O_(3) nanowires and thin films for metal oxide semiconductor gas sensors:Sensing mechanisms and performance enhancement strategies

查看全文 作　　者：Adeel [1,2]Afzal 高影响力作者 机构地区：[1]Dipartimento di Chimica,Universita degli Studi di Bari“Aldo Moro”,Via Orabona 4,70126,Bari,Italy;[2]Department of Chemistry,College of Science,University of Hafr Al Batin,PO Box 1803,Hafr Al Batin,39524,Saudi Arabia高影响力机构 出　　处：《Journal of Materiomics》索引2019年第5卷第4期,共16页高影响力期刊 摘　　要：The reliable,selective,and fast detection of the inorganic and organic gases in indoor and outdoor air and industrial processes is a huge challenge for environmental sustainability,healthier life,and disease control and diagnosis.Metal oxides have been frequently explored as highly sensitive receptor elements in the electronic gas sensors since the 1960s.Gallium oxide(Ga_(2)O_(3)),often recognized as one of the widest-bandgap semiconductors,has shown tremendous potential as the inorganic gas receptor because of its extraordinary chemical and thermal stability,and excellent electronic properties.This article presents a comprehensive reference on the electrical properties,historical developments,detection mechanisms,and gas sensing performance of Ga_(2)O_(3) nanowires and composite nanostructures.In particular,the relationships between composition,nanostructure,and gas sensing properties of galliumcontaining oxidic nanomaterials such as β-Ga_(2)O_(3) nanowires,surface-modified Ga_(2)O_(3),metal-doped Ga_(2)O_(3) or Ga-doped metal oxides,and Ga_(2)O_(3)/metal oxide composite heterostructures are studied.The applications of Ga_(2)O_(3) gas sensors are discussed with an emphasis on their practical limitations such as high-temperature operation,power consumption,and miniaturization issues.Finally,future research directions and potential developments are suggested. 关 键 词：β-Ga_(2)O_(3)nanowires Gas sensors NANOMATERIALS SEMICONDUCTORS Sensing mechanisms Thin films
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