Preparation And Properties Of SERS Substrate Of Copper Silicon Nanowires(Cu-SiNWs)

Raman spectroscopy can be used for detection and analysis of molecular structure and material composition information, this technique has a high sensitivity, no damage to the characteristics of the sample, in the major areas of bioinformatics, chemistry, environmental and other fields have a wide range of applications. With the development of science and technology, SERS(Surface-Enhanced Raman Scattering, SERS) technology is developing rapidly, thereby widening the scope of application of Raman spectroscopy. SERS technique has low detection limits, non-destructive, efficient and repeatable, etc., over the past few decades gained widespread attention. It is in analytical chemistry, biomedicine, environmental protection and trace detection have played an important role. Therefore, the study cost-effective production process simpler SERS substrate is an urgent need for SERS technology. In this paper, research on preparation and properties of copper SERS substrate silicon nanowire arrays. The main contents are as follows:First, the surface-enhanced Raman spectroscopy are described, and to explain their enhancement mechanism. Raman enhancement technology is the key to prepare the active substrate. Therefore, this paper designed a new activity base to explore the mechanism in order to enhance its preparation process is simple, more cost-effective SERS substrate.Secondly, the use of chemical etching of silicon nanowires were prepared to study nanowire growth and etching time relationship; and analyzes the factors that influence the morphology of the silicon nanowires.Finally, the silicon nanowire as a template, a new type of active substrate(Cu-Si NWs, copper silicon nanowire arrays). Silicon nanowire is a semiconductor nano material itself has a certain Raman enhancement, modification in the nanowire structures with copper nanoparticles, use of probe molecules(R6G) to detect its enhancement. And to explore the length of the nanowires, Copper nanoparticle size on SERS performance.The active substrate having a simple preparation, enhance the activity of certain characteristics and having good stability, as a new active substrate for further study SERS effect provides the experimental means and results.