Surface-Enhanced Raman Scattering Imaging of a Single Molecule on Urchin-like Silver Nanowires
Surface-Enhanced Raman Scattering Imaging of a Single Molecule on Urchin-like Silver Nanowires
复制标题
DOI：
10.1021/am2007239
复制
发表时间：
2011-09-01
影响因子：
9.5
通讯作者：
Chiu, Hsin-Tien
中科院分区：
文献类型：
--
作者：
Hsiao, Wei-Han;Chen, Hsin-Yu;Chiu, Hsin-Tien
以硝酸银和铜为原料，在十六烷基三甲基氯化铵和硝酸存在下，于室温下在丝网印刷碳电极上制备了海胆状银纳米线。纳米线的直径约为100 nm，长度可达10 μ m。利用拉曼光谱，在海胆状银纳米线基底上罗丹明6 G（R6 G）的检测限可以低至10（-16）M，而分析增强因子约为10（13）。拉曼映射图像证实可以检测到基底上的单个R6 G分子。
Urchin-like silver nanowires are prepared by reacting AgNO3(aq) with copper metal in the presence of cetyltrimethylammonium chloride and HNO3(aq) on a screen-printed carbon electrode at room temperature. The diameters of the nanowires are about 100 nm, and their lengths are up to 10 mu m. Using Raman spectroscopy, the detection limit of Rhodamine 6G (R6G) on the urchin-like silver nanowire substrate can be as low as 10(-16) M, while the analytical enhancement factor is about 10(13). Raman mapping images confirm that a single R6G molecule on the substrate can be detected.