Electrophoretic Self-Assembly of Sol-Gel Derived Silica Microspheres
Monosized silica microspheres (100−500 nm) were prepared by a sol-gel process by using tetraethyl orthosilicate precursor. A well-dispersed suspension was obtained by adjusting suspension to be weakly basic for a better yield of electrophoretic self-assembly (EPSA). A perfect EPSA behavior of silica microspheres into the layered pattern with the FCC structure was created. EPSA technique has been demonstrated as a simple and effective route to make numerous templates, which are associated with 3-D structures of silica microspheres in asymmetric geometries, for design of photonic crystals.
Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park
R. F. Louh and E. Huang, "Electrophoretic Self-Assembly of Sol-Gel Derived Silica Microspheres", Solid State Phenomena, Vols. 124-126, pp. 599-602, 2007