Growth Process and Mechanism of Silver Dendritein HF/AgNO3/Si System

作     者：Wenbin YANG 1 2 * Kai ZHANG 3 Jinghui FAN3 Juying WU3 Qiang YAN4 1State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials Southwest University of Science and Technology Mian yang China 2 School of Materials Science and Engineering Southwest Universit y of Science and Technology Mian yang China 3 Institute of System Engineering China Academy of Engineening Physics Mian yang China 4 Southwest Institute of Physics Chengdu China 

会议名称：《2011 IEEE International Conference on Waste Recycling,Ecology and Environment(ICWREE 2011)》

会议日期：2011年

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：financial support of this work from NSAF of China (No.11 176025) Open Project of State Key Laboratory Cultivation Base for Non-metal Composites and Functional Materials (No.10 zxfk31) Open Project of Key Subject Laboratory of National Defense for Radio active Waste and En vironmental Security (No . 08zxnp07,No.10zxnk06) 

关 键 词：silverdendrite morphology growth process mechanism 

摘      要：A kind of straightforward method was developed to fabricate Ag dendrites with hierarchical structures in AgNO3/HF/Si system at room temperature . High quality Ag dendrites were produced on silicon substrate as the form of uniform solid film with a thickness of 3 mm . The X-ray diffraction analysis reveals that face-centre cubic Ag phases are dominant in the dendrites. The non-equilibrium potential and anisot ropic growth at different reaction times result in morphological evolution . As the reaction proceeds , the dendritic structure transforms into thermodynamically stable hexagonal structure . It is believed that the global diffusion-limited aggregation as well as the locally oriented attachment of Ag grains are responsible for the formation of Ag dendrites.