Gold/Silicon nanowire arrays modified by Gold nanosphere as the surface-enhanced Raman spectroscopy substrate

5th International Conference on Advances in Optoelectronics and Micro/Nano-optics

Zhou, Long^1 ; Li, Mingyu^1 ; Tang, Longhua^1 ; He, Jian-Jun^1

State Key Laboratory of Modem Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou

310027, China^1

关键词: Cost effective;    Gold nanospheres;    Hybrid substrates;    Long term stability;    Nanowire arrays;    Reproducibilities;    Silicon nanowires;    Surface enhanced Raman spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/680/1/012003/pdf
DOI  :  10.1088/1742-6596/680/1/012003

来源: IOP

【 摘 要 】

Fabrication of gold coated silicon nanowires (AuSiNW) substrate is introduced in detail and A hybrid substrate is designed for surface-enhanced Raman spectroscopy (SERS). The SERS behaviors are discussed and compared by the detection of 4, 4'-Bipyridine. Gold nanoparicles is modified on the surface of AuSiNW to form the "hot gap". Molecules captured in these "hot gap" can generate huge Raman signal. Double-fold enhancement of SERS signal has been achieved comparing with AuSiNW. The as-fabricated hybrid substrate exhibit high SERS sensitivity, long-term stability, and consistent reproducibility, highly potential for realizing a rapid, cost-effective, and label-free SERS-based biosensor.