Nanoparticle-free single molecule anti-stokes Raman spectroscopy.
Nanoparticle-free single molecule anti-stokes Raman spectroscopy.
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DOI：
10.1103/physrevlett.94.058301
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发表时间：
2005-02
影响因子：
8.6
通讯作者：
Lynn Peyser-Capadona;Jie Zheng;Jose I. Gonzalez;Tae‐Hee Lee;Sandeep Patel;R. Dickson
中科院分区：
文献类型：
--
作者：
Lynn Peyser-Capadona;Jie Zheng;Jose I. Gonzalez;Tae‐Hee Lee;Sandeep Patel;R. Dickson
在没有大的等离子体支持纳米颗粒的情况下，生物相容性树枝状聚合物和肽封装的少原子Ag纳米簇产生支架特异性单分子（SM）斯托克斯和反斯托克斯拉曼散射。强SM振动签名增强纳米粒子的样品中的Agn跃迁，不能产生等离子体增强。观察到特征SM-拉曼光谱，与antibunching的底层银发射直接确认SM性质的发射物种。
In the absence of large, plasmon-supporting nanoparticles, biocompatible dendrimer- and peptide-encapsulated few-atom Ag nanoclusters produce scaffold-specific single molecule (SM) Stokes and anti-Stokes Raman scattering. The strong SM vibrational signatures are enhanced by the Agn transitions in nanoparticle-free samples and cannot arise from plasmon enhancement. Characteristic SM-Raman intermittency is observed, with antibunching of the underlying Agn emission directly confirming the SM nature of the emissive species.