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Paper published in small by Dr. Houyu Wang et. al.

Date released: 2014-08-01

Title: Silicon nanohybrids-based surface-enhanced Raman scattering sensor

Authors: Houyu Wang, Xiangxu Jiang, Shuit-Tong Lee, and Yao He*

Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory of Carbon-based Functional Materials & Devices, Soochow University, Suzhou, 215123, PR China

Abstract: Nanomaterial-based surface-enhanced Raman scattering (SERS) sensors are highly promising analytical tools, capable of ultrasensitive, multiplex, and nondestructive detection of chemical and biological species. Extensive efforts have been made to design various silicon nanohybrids-based SERS substrates such as gold/silver nanoparticles (NPs)-decorated silicon nanowires, Au/Ag NPs-decorated silicon wafer (AuNPs@Si), and so forth. Comparison to free AuNPs- and AgNPs-based SERS sensors, the silicon nanohybrids-based SERS sensors feature higher enhancement factors (EF) and excellent reproducibility since SERS hot spots are efficiently coupled and stabilized through inter-connection to the semiconducting silicon substrates. Consequently, in the past decade, we have witnessed giant advancement of developing silicon nanohybrids-based SERS sensors for myriad sensing applications. In this review, the representative achievements related with design of high-performance silicon nanohybrids-based SERS sensors and their use for chemical and biological analysis are reviewed in a detailed way. Furthermore, the major opportunities and challenges in this field are discussed from a broad perspective and possible future directions.


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