Synthesis, Characterization And Optical Properties Of Metal(Zn、Sn) Oxygen-group Semiconductor Nanostructure

Among semiconductor nanomaterial, Ⅱ-Ⅵ group semiconductor. Ⅲ-Ⅴ group semiconductor and Ⅳ-Ⅵ group semiconductor attract majority attention and oxygen group semiconductor compound is one important part. This paper mainly studies Zn、Sn oxygen group semiconductor nanomaterial (ZnO,SnS) to explore the synthetic methods and property character such as optical, electromagnetic absorption of ZnO, SnS nanomaterials. The paper is divided into two parts:the first one is about synthetic methods and property character of ZnO nanomaterial and the second one is about synthetic methods and property character of SnS nanomaterial. ZnO is a n-type semiconductor with wide gap of about3.3eV and high exciton binding energy of60MeV in ambient environments. ZnO nanomaterial demonstrate widespread application prospects in optical and electro-magnetic field due to its excellent semiconductor properties. Compare to wide bandgap semiconductor nanomaterial ZnO, narrow bandgap semiconductor material SnS, is a kind of dark brown material and its direct bandgap is about1.07ev and indirect bandgap is about1.3ev in general, which is well match with solar spectrum. Thus, its application such as solar cell, microwave absorption, efficient excitonic emission, gas sensors and transducers has been attract researchers attention. This main content and result of this research are as follows:ZnO nanomaterial(1) We introduces the basic principle and development of Raman spectroscopy and surface Raman spectroscopy.This paper, through the water bath method synthesized ZnO porous nanosheet structure, and Au nanocluters(thickness of1-2nm) is deposite on the ZnO porous nanosheet surface at a rate of about0.05nm/s. We character surface enhanced Raman spectra of the Au-ZnO coupling system at different excited wavelengths, and analyze the experimental result to explore relationship of the surface plasmon Raman enhancement effect and chemical enhancement effect in the experiment. The experiment synthesis and character ZnO nanosheet which is assembly by ZnO nanoparticle, and it shows high ratio aspect of surface area. And it explicit well application in surface Raman enhanced spectroscopy (SERs) phenomenon when it is coating with Au nanoparticle.(2) We synthesize and charater hierarchical ZnO nanostructure which has also attracted great interests as microwave radiation absorbing and shielding materials in the high-frequency range due to their many unique chemical and physical properties by chemical vapor deposition. In third chapter, the tree nanostructure show its high microwave radiation absorbing property. The synthetic mechanism and nanostructure property will be explained due to XRD、SEM and TEM results in the third chapter.SnS nanomaterial Two SnS nanostructures are synthesized and they show their bandgap is about1.5ev by UV-vis spectra which is match well with SnS bulk material. And we character two kinds of SnS nanomaterial and synthetic mechanism will be explicit and discuss in the chapter forth.