碳纳米管
分子
纳米技术
材料科学
基质(水族馆)
拉曼散射
等离子体子
拉曼光谱
纳米晶
化学
光电子学
有机化学
海洋学
光学
物理
地质学
作者
Chenmaya Xia,Daqi Zhang,Henan Li,Sheng Li,Haoming Liu,Li Ding,Xiyan Liu,Min Lyu,Ruoming Li,Juan Yang,Yan Li
出处
期刊:Nano Research
[Springer Nature]
日期:2021-09-10
卷期号:15 (1): 694-700
被引量:16
标识
DOI:10.1007/s12274-021-3549-y
摘要
In single molecule study, surface-enhanced Raman scattering (SERS) has the advantage of specifically providing structural information of the molecules targeted. The main challenge in single molecule SERS is developing reusable plasmonic substrates that ensures single molecule sensitivity and acquires intrinsic information of molecules. Here, we proposed a strategy to utilize single-walled carbon nanotubes (SWNTs) to construct SERS substrates. Employing ultrasonic spray pyrolysis, we prepared in situ polyhedral gold nanocrystals closely spaced and attached to nanotubes, ensuring valid hot spots formed along the tube-walls. With such SERS substrates, we proved the single molecule detection by the statistical analysis based on the natural abundance of isotopes. Since SWNTs provide non-chemical bonding adsorption sites, our SERS substrates are easily reusable and have a unique advantage of preserving the intrinsic property of the molecules detected. Using SWNTs to build SERS substrates may become a powerful general strategy in various static and dynamic studies of single molecules.
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