Crystal formation and growth mechanism of inorganic nanomaterials in sonochemical syntheses  

作　　者：GENG Jun JIANG LiPing ZHU JunJie 

机构地区：[1]State Key Laboratory of Analytical Chemistry for Life Science,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210093,China [2]Department of Chemtstry,Jiangsu Institute of Education,Nanjing 210013,China

出　　处：《Science China Chemistry》2012年第11期2292-2310,共19页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (20805022, 21075061, 21121091);China Postdoctoral Science Foundation ( 20100471294)

摘　　要：A clear understanding of the nucleation, growth, coarsening, the preparation of highly controlled nanostructures. Among and aggregation processes of nanomaterials is necessary to enable wet chemical synthetic methods, ultrasound-assisted preparation has become an important tool in material science. The formation and crystal growth mechanism under ultrasound is special compared with other wet chemical synthetic routes. In this review, we discussed the chemical and physical effect of ultrasound and summarized the ultrasonic effect on crystallization. The sonolysis of water and the cavitation-induced microjet impact and shockwave are the two key factors in the sonochemieal formation of inorganic nanomaterials. The ultrasonic-assisted Ostwald ripening and oriented attachment processes have been reviewed for the possible crystal growth mechanisms in the fabrication of inorganic nanostructures.A clear understanding of the nucleation, growth, coarsening, and aggregation processes of nanomaterials is necessary to enable the preparation of highly controlled nanostructures. Among wet chemical synthetic methods, ultrasound-assisted preparation has become an important tool in material science. The formation and crystal growth mechanism under ultrasound is special compared with other wet chemical synthetic routes. In this review, we discussed the chemical and physical effect of ultrasound and summarized the ultrasonic effect on crystallization. The sonolysis of water and the cavitation-induced microjet impact and shockwave are the two key factors in the sonochemical formation of inorganic nanomaterials. The ultrasonic-assisted Ostwald ripening and oriented attachment processes have been reviewed for the possible crystal growth mechanisms in the fabrication of inorganic nanostructures.

关 键 词：nanoparticles NANOCRYSTALLINE synthesis SONOCHEMISTRY crystal growth formation mechanism 

分 类 号：TQ163[化学工程—高温制品工业] TB383[一般工业技术—材料科学与工程]