Abstract
We have developed the method for synthesizing mesoporous silica having helical channels by using anionic surfactants based on amino acids. During this research, we have established a simple and novel liquid-phase method for preparing uniform-sized silica nanospheres (SNSs) 8－400 nm in size. The SNSs were synthesized through hydrolysis and condensation reactions of TEOS in the emulsion system containing TEOS, water and basic amino acids such as lysine and arginine under weakly basic conditions (pH 9－10). After the reaction, uniform-sized SNSs were stably dispersed in homogeneous solutions without any precipitation. Interestingly, the arrangement of these SNSs into a cubic closed packed (ccp) structure was achieved simply by solvent evaporation. Thus formed SNSs can be categorized into well-ordered mesoporous silicas because they have three-dimensional, interparticle voids with high uniformity.
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