Room temperature hydrogen sensing performances of multiple networked GaN nanowire sensors codecorated with Au and Pt nanoparticles
来源期刊：中南大学学报(英文版)2015年第5期
论文作者：PARK Sunghoon KIM Soohyun PARK Suyoung LEE Sangmin LEE Chongmu
文章页码：1614 - 1618
Key words：GaN; nanowires; metal catalyst; bimetallic system; gas sensor; codecoration
Abstract: The sensing performances of multiple networked GaN nanowire (NW) sensor codecorated with Au and Pt nanoparticles were examined. The pristine GaN nanowires show responses of approximately 108%-173% to 0.05%-0.25% H2 at room temperature. On the other hand, the GaN nanowires decorated with Au and those decorated with Pt lead to 1.1-1.3 and 1.2-1.6 times, respectively, stronger responses to 0.05%-0.25% H2. In contrast, the AuPt-codecorated GaN nanowires show 1.3-2.0 times stronger responses to 0.05%-0.25% H2. In other words, the GaN nanorods codecorated with Au and Pt nanoparticles show much stronger response to H2 gas than the Au or Pt monometal-decorated counterpart. The underlying mechanism for the enhanced response of the AuPt-codecorated GaN nanowire was discussed.
PARK Sunghoon1, KIM Soohyun1, PARK Suyoung1, LEE Sangmin2, LEE Chongmu1
(1. Department of Materials Science and Engineering, Inha University, 253 Yonghyun-dong,
Nam-gu, Incheon, 402-751, Korea;
2. Department of Electronic Engineering, Inha University, 253 Yonghyun-dong,
Nam-gu, Incheon, 402-751, Korea)
Abstract:The sensing performances of multiple networked GaN nanowire (NW) sensor codecorated with Au and Pt nanoparticles were examined. The pristine GaN nanowires show responses of approximately 108%-173% to 0.05%-0.25% H2 at room temperature. On the other hand, the GaN nanowires decorated with Au and those decorated with Pt lead to 1.1-1.3 and 1.2-1.6 times, respectively, stronger responses to 0.05%-0.25% H2. In contrast, the AuPt-codecorated GaN nanowires show 1.3-2.0 times stronger responses to 0.05%-0.25% H2. In other words, the GaN nanorods codecorated with Au and Pt nanoparticles show much stronger response to H2 gas than the Au or Pt monometal-decorated counterpart. The underlying mechanism for the enhanced response of the AuPt-codecorated GaN nanowire was discussed.
Key words:GaN; nanowires; metal catalyst; bimetallic system; gas sensor; codecoration
