Synthesis of Hierarchically Arrayed Silica Nanorods via Reverse Amphiphilic Block Copolymer Mesophases

Abstract

Abstract: A reverse amphiphilic mesophases approach to create hierarchically arrayed silica nanorods has been demonstrated. In nonpolar solvent systems, the cylinder nanorods with a uniform diameter(10 nm) generated from highly ordered two-dimensional(2D) reverse hexagonal mesophases are aligned within lamellar macrostructures(¹50 nm). The diameter size of silica nanorods can be adjusted from 9 to 15 nm by varying the chain length of the EO segment and the concentration of the surfactants. Low surfactant concentration and long hydrophilic EO segment chain yield silica nanorods with a large diameter. The calcined material has a relatively small surface area of 275 m²/g. This approach may provide a new pathway to the fabrication of nano-objects that might be applied in nanoscale devices.

Key words: Synthesis, Block copolymer, Silica, Nanorod

CLC Number:

O614

TrendMD:

YU Cheng-Zhong, TIAN Bo-Zhi, FAN Jie, TU Bo, ZHAO Dong-Yuan. Synthesis of Hierarchically Arrayed Silica Nanorods via Reverse Amphiphilic Block Copolymer Mesophases[J]. Chem. J. Chinese Universities, 2003, 24(1): 5.

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Synthesis of Hierarchically Arrayed Silica Nanorods via Reverse Amphiphilic Block Copolymer Mesophases

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