Fabrication of hollow silica spheres using droplet templates derived from a miniemulsion technique.
Hollow silica spheres have been successfully fabricated by means of a miniemulsion technique, in which miniemulsion droplets of tetraethoxysilane (TEOS) and octane were prepared with cetyltrimethylammonium bromide as a surfactant and hexadecane as a costabilizer and used as templates. As the TEOS diffused out from the droplets, it was hydrolyzed and condensed to form a silica shell at the oil/water interface. In this way, hollow silica spheres could be obtained directly since the miniemulsion droplets of octane could be evaporated very easily during the reaction process or the drying process; neither an additional dissolution nor a calcination process or additional surface modification of the templates were needed.
Peng
Bo
B
Department of Materials Science, Advanced Coatings Research Center of China, Chinese Educational Ministry and Advanced Materials Laboratory, Fudan University, Shanghai 200433, People's Republic of China.
Chen
Min
M
Zhou
Shuxue
S
Wu
Limin
L
Ma
Xiaohua
X
D000473:Alkanes / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D004655:Emulsions; D008863:Microspheres; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
D000473:Alkanes; D002593:Cetrimonium Compounds; D004655:Emulsions; D012822:Silicon Dioxide; C007932:n-hexadecane; D000077286:Cetrimonium