银纳米结构修饰的硅纳米线作为超灵敏表面增强拉曼光谱的界面。

Silicon nanowires coated with silver nanostructures as ultrasensitive interfaces for surface-enhanced Raman spectroscopy.

机构信息

Institut de Recherche Interdisciplinaire (IRI, USR-CNRS 3078) and Institut d'Electronique, de Microelectronique et de Nanotechnologie (IEMN, UMR-CNRS 8520), Cite Scientifique, Avenue Poincare - BP 60069, 59652 Villeneuve d'Ascq, France.

出版信息

ACS Appl Mater Interfaces. 2009 Jul;1(7):1396-403. doi: 10.1021/am900087s.

DOI:10.1021/am900087s

PMID:20355941

Abstract

Silver nanoparticles (Ag NPs) were chemically deposited on silicon nanowires (SiNWs), prepared using the vapor-liquid-solid (VLS) growth mechanism, using an in situ electroless metal deposition technique. The resulting SiNWs/Ag NPs composite interfaces showed large Raman scattering enhancement for rhodamine 6G (R6G) with a detection limit of 10(-14) M and an enhancement factor of 2.3 x 10(8). This large enhancement factor was attributed to the presence of "hot" spots on the SiNWs/Ag NPs substrate.

摘要

采用化学沉积法将银纳米颗粒（Ag NPs）沉积在使用汽-液-固（VLS）生长机制制备的硅纳米线（SiNWs）上。所得的 SiNWs/Ag NPs 复合材料界面对罗丹明 6G（R6G）表现出较大的拉曼散射增强，检测限为 10（-14）M，增强因子为 2.3×10（8）。这种大的增强因子归因于 SiNWs/Ag NPs 衬底上存在“热点”。