Single CeO2 nanowire gas sensor supported with Pt nanocrystals:: Gas sensitivity, surface bond states, and chemical mechanism

被引：206

作者：

Liao, L. ^{[1
]}

Mai, H. X. ^{[2
]}

Yuan, Q. ^{[2
]}

Lu, H. B. ^{[1
]}

Li, J. C. ^{[1
]}

Liu, C. ^{[1
]}

Yan, C. H. ^{[2
]}

Shen, Z. X. ^{[3
]}

Yu, T. ^{[3
]}

机构：

[1] Wuhan Univ, Dept Phys, Key Lab Acoust & Photon Mat & Devices, Minist Educ, Wuhan 430072, Peoples R China

[2] Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China

[3] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637616, Singapore

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 24期

关键词：

D O I：

10.1021/jp7117778

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present a new type of CeO2 nanodevice in which a single CeO2 nanowire was used as the sensing unit. It was found that incorporation of Pt nanocrystals on CeO2 nanowire could significantly increase the sensor response. A possible mechanism was discussed based on the study of morphology and surface bond states of the nanowire using local electron energy loss spectroscopy and X-ray photoemission spectroscopy. The results provide a pathway to improve the performance of gas sensors with a good understanding of the nanowire's surface physics and chemistry.

引用

页码：9061 / 9065

页数：5

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