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Summary of Material science doctoral thesis: Fabrication of flower like, dendrite like nanostructures of gold and silver on silicon for use in the identification of some organic molecules by surface enhanced Raman scattering

In this thesis, we research and fabricate AgNDs, AgNFs, AuNFs structures on silicon by chemical deposition and electrochemical deposition method for the main purpose of using as SERS substrate. To this target, we have studied the morphology, structure and some properties of the nanostructures produced. | 1 MINISTRY OF EDUCATION VIETNAM ACADEMY AND TRAINING OF SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY --------------------------------------------- Kieu Ngoc Minh FABRICATION OF FLOWER-LIKE DENDRITE-LIKE NANOSTRUCTURES OF GOLD AND SILVER ON SILICON FOR USE IN THE IDENTIFICATION OF SOME ORGANIC MOLECULES BY SURFACE ENHANCED RAMAN SCATTERING Major Electronic material Code 9 44 01 23 SUMMARY OF MATERIAL SCIENCE DOCTORAL THESIS Ha Noi 2020 2 This thesis was accomplished in Graduated University of Science and Technology Vietnam Academy of Science and Technology. Supervisor 1. Prof. Dr. Dao Tran Cao 2. Dr. Cao Tuan Anh Peer reviewer 1 Peer reviewer 2 Peer reviewer 3 This thesis will be defended in The dissertation will be defended in front of the Institute of Doctoral Dissertation Assessment Council taking place at the Academy of Science and Technology - Vietnam Academy of Science and Technology at . hour . day . month . year 2020 This thesis will be stored in - Library of Graduated University of Science and Technology - Vietnam National Library 1 Prologue SERS surface-enhanced Raman scattering is a modern analytical technique that is being strongly researched in the world and Vietnam to detection trace ppm-ppb range of many different molecules especially organic and biological molecules. In SERS technique the most important is the SERS substrate. The SERS substrate is a rugged continuous or discontinuous precious metal silver or gold at the nano-scale. When analyte molecules are added to this surface the signal of Raman scattering of the analyte molecule is greatly enhanced. Thus it can be said that SERS substrate is the device that amplifies Raman scattering signal of the analyte molecule. In Vietnam there are some researches on the fabrication of Ag Au precious metal nanostructures and using as SERS substrates. However the researches mainly focus fabricate nanoparticle structures and so far fabrication of silver nano-dendrites AgNDs silver .