期刊
NANO LETTERS
卷 10, 期 3, 页码 958-963出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl903888c
关键词
Carbon nanotubes; gas sensors; electronic structure; metal nanopaticles; optical properties
类别
资金
- National Energy Technology Laboratory (NETL) [DE-AC26-04NT41817]
We have explored the room temperature response of metal nanoparticle decorated single-walled carbon nanotubes (NPSWNTs) using a combination of electrical transport, optical spectroscopy, and electronic structure calculations. We have found that upon the electrochemical growth of Au NPs on SWNTs, there is a transfer of electron density from the SWNT to the No species, and that adsorption of CO molecules on the NP surface is accompanied by transfer of electronic density back into the SWNT. Moreover, the electronic structure calculations indicate dramatic variations in the charge density at the NP-SWNT interface, which supports our previous observation that interfacial potential barriers dominate the electrical behavior of NP-SWNT systems.
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