Tip-Enhanced Raman Spectroscopic Imaging of Individual Carbon Nanotubes with Subnanometer Resolution
Tip-Enhanced Raman Spectroscopic Imaging of Individual Carbon Nanotubes with Subnanometer Resolution
复制标题
具有亚纳米分辨率的单个碳纳米管的尖端增强拉曼光谱成像
DOI：
10.1021/acs.nanolett.6b00533
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发表时间：
2016-07-01
期刊：
影响因子：
10.8
通讯作者：
Dong, Zhenchao
中科院分区：
文献类型：
--
作者：
Liao, Menghan;Jiang, Song;Dong, Zhenchao
利用低温超高真空扫描隧道显微镜，在Ag（111）衬底上使用银尖对单个碳纳米管（CNTs）进行了尖端增强拉曼光谱（TERS）研究。由于银纳米间隙提供的强且高度局域化的等离子体场，碳纳米管上的TERS的空间分辨率降至0.7 nm左右。如此高的空间分辨率允许在真实空间中可视化缺陷引起的d波段散射的空间范围，跟踪应变引起的光谱演变，并解决弯曲碳纳米管内外壁之间的光谱差异，所有这些都在纳米尺度上。
Individual carbon nanotubes (CNTs) have been investigated by tip-enhanced Raman spectroscopy (TERS) using silver tips on the Ag(111) substrate with a low-temperature ultrahigh-vacuum scanning tunneling microscope. Thanks to the strong and highly localized plasmonic field offered by the silver nanogap, the spatial resolution of TERS on CNTs is driven down to about 0.7 nm. Such a high spatial resolution allows to visualize in real space the spatial extent of the defect-induced D-band scattering, to track the strain-induced spectral evolution, and to resolve the spectral differences between the inner and the outer sides of a bent CNT, all at the nanometer scale.