Enhancement of the benzene-sensing performance of Si nanowires through the incorporation of TeO₂ heterointerfaces and Pd-sensitization
- Authors
- Kwon, Yong Jung; Choi, Sun-Woo; Kang, Sung Yong; Choi, Myung Sik; Bang, Jae Hoon; Kim, Sang Sub; Kim, Hyoun Woo
- Issue Date
- Jun-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Silicon; TeO2; Pd nanoparticles; Chemical sensors
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.244, pp.1085 - 1097
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 244
- Start Page
- 1085
- End Page
- 1097
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/19640
- DOI
- 10.1016/j.snb.2017.01.078
- ISSN
- 0925-4005
- Abstract
- We report a novel method to significantly improve the C₆H₆-sensing performance of Si nanowires through the combination of TeO₂ branches and Pd sensitization. The morphological investigation revealed that TeO₂ branches were densely formed on the stem nanowires (NWs). The sensor responses of the Pdfunctionalized branched NWs exhibited superior sensor responses of 55.19 to C₆H₆ gas. In particular, Pd nanoparticles enhanced the sensor response to C₆H₆ gas most efficiently, increasing the sensor response by 173.5%. Possible mechanisms for the sensing of the Pd-decorated branched nanowires will be associated with resistance modulation along the branch TeO₂ nanowires (including catalytic Pd effects), at the networked homojunctions between the branch TeO₂ nanowires, at the boundaries of the TeO₂ nanograins, and at the Pd/TeO₂ heterojunctions.
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