Synthesis of Novel SnO_2 Quantum Cubes and Their Selfassembly  

作　　者：俞中平 王智宇 

机构地区：[1]State Key Laboratory of Silicon Materials,Department of Materials Science and Engineering,Zhejiang University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2011年第2期270-273,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the PCSIRT,the National Natural Science Foundation of China (Nos.50532030 and 50625206);the Zhejiang Provincial Natural Science Foundation of China(No.Z4080021)

摘　　要：Nano-structured cubic SnO2 crystalines were successfully synthesized through solvothermal route.The obtained products were characterized by X-ray diffraction （XRD）,transmission electron microscopy （TEM） and high resolution TEM （HRTEM）.The study showed that,the SnO2 particles were rutile structured and almost uniformly cube shaped crystals in quantum size （3-8 nm）.Self-assembly behavior of the cubic SnO2 quantum dots was also observed.The synthesis process can be defined as an nonhydrolysis （NH） hydroxylation reaction provided by the amide elimination of carboxylated precursors.The formation of cubic morphology of SnO2 can be ascribed to the mild reaction featured by high nucleation rate and low growth rate,surface energy difference of the crystallographic facets of SnO2 and the passivation effect of the starting material-dodecylamine which drastically reduced the dipole interation.The selfassembly of the cubic SnO2 quantum dots was driven by van der Waals force and capillary force.Nano-structured cubic SnO2 crystalines were successfully synthesized through solvothermal route.The obtained products were characterized by X-ray diffraction （XRD）,transmission electron microscopy （TEM） and high resolution TEM （HRTEM）.The study showed that,the SnO2 particles were rutile structured and almost uniformly cube shaped crystals in quantum size （3-8 nm）.Self-assembly behavior of the cubic SnO2 quantum dots was also observed.The synthesis process can be defined as an nonhydrolysis （NH） hydroxylation reaction provided by the amide elimination of carboxylated precursors.The formation of cubic morphology of SnO2 can be ascribed to the mild reaction featured by high nucleation rate and low growth rate,surface energy difference of the crystallographic facets of SnO2 and the passivation effect of the starting material-dodecylamine which drastically reduced the dipole interation.The selfassembly of the cubic SnO2 quantum dots was driven by van der Waals force and capillary force.

关 键 词：nanocube quantum dot crystal growth tin oxide 

分 类 号：TB383.1[一般工业技术—材料科学与工程]