期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 118, 期 22, 页码 11813-11819出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp5032288
关键词
-
资金
- European Community [ENHANCE 238409]
- FP7 project SOLAROGENIX [NMP4-SL-2012-310333]
- Padova University
- PRAT [CPDA102579]
- Regione Lombardia-INSTM AT-LANTE
- [CPDR132937/13]
A combined chemical vapor deposition (CVD)/radio frequency (rf) sputtering approach to Au/Fe2O3 nanocomposites based on the scarcely investigated epsilon-iron(III) oxide polymorph is reported. The developed materials, analyzed by field emission-scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDXS), X-ray photoelectron spectroscopy (XPS), and secondary ion mass spectrometry (SIMS), consisted of iron oxide nanorods decorated by gold nanoparticles (NPs), whose content and distribution could be tailored as a function of sputtering time. Interestingly, the intimate Au/epsilon-Fe2O3 interfacial contact along with iron oxide one-dimensional (1D) morphology resulted in promising performances for the selective detection of gaseous NO2 at moderate working temperatures. At variance with the other iron(III) oxide polymorphs (alpha-, beta-, and gamma-Fe2O3), that display an n-type semiconducting behavior, epsilon-Fe2O3 exhibited a p-type response, clearly enhanced by Au introduction. As a whole, the obtained results indicate that the sensitization of p-type materials with metal NPs could be a valuable tool for the fabrication of advanced sensing devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据