AZ91镁合金直齿轮模锻成形工艺数值模拟.pdf

A One-step Method for Deposition of Silver Nanoparticles on the
Surface of Colloid Silica Spheres
TANG Shao-chun, MENG Xiang-kang, TANG Yue-Feng
(Department of Materials Science and Engineering, National Laboratory of Solid State
Microstructures, Nanjing University, Nanjing 210093, China)

Abstract: In this paper, an electrochemical procedure has been employed to deposit silver nanoparticles onto the
surface of colloid silica spheres. Under appropriate conditions, silver-silica posite can be essfully
obtained. The resulted products were characterized through X-ray diffraction, Scanning electron microscopy,
Transmission electron microscopy and Energy disperisive X-ray analysis. Silver nanoparticles with size of 6-7 nm
have been confirmed to deposit homogeneously onto the surface of preformed silica submicrospheres. The
experimental results affirmed the feasibility and advantages of electrochemical deposition method for uniform
deposition of silver nanoparticles on colloid silica spheres surface.

Key words: electrochemical deposition; silver-silica posite; metal-coated dielectric
spheres


An atomic force microscopy investigation of the 6H-SiC (0001)
surface
JIANG Shou-zhen, YU Guang-wei, CHEN Xiu-fang, LI Juan, WNAG Ying-ming, NING
Li-na, HU Xiao-bo, XU Xian-gang*, WANG Ji-yang, JIANG Min-hua
(State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China)

Abstract: Micropipes and step structures on 6H-SiC (0001) surface were investigated through an
atomic force microscopy (AFM). All of the micropipes examined are origins of spiral steps, indicating
that dislocations intersect the surface at these points. No micropipes were detected at the center of
spirals with a step height=. Step flow mode was observed within the central faceted area. Step
bunching and atomically rough surfaces were observed within the peripheral convex area. If the
inclination α in respect to the (0001)