Synthesis of well-ordered nanospheres with uniform mesopores assisted by basic amino acids
We applied basic amino acids in place of NH3 to the well-known St(o)ber method for preparing silica spheres; the hydrolysis and condensation reactions of tetraethyl orthosilicate were conducted in the presence of basic amino acids such as L-lysine and L-arginine. The obtained silica spheres, which are of uniform size of 12 nm, are well-ordered, forming a cubic closed pack (ccp) structure, Fm-3m space group. The arrangement of uniform spheres simultaneously creates intraparticle uniform mesopores of about 3 nm. We also succeeded in the preparation of exact carbon replica with uniform mesopores by using the silica nanospheres as a template. The results shown here are the first example of the arrangement of silica nanospheres assisted by simple biomolecules, leading to the development of a novel family of ordered mesoporous materials, which will open up a wide range of possibilities for the synthesis of spontaneously assembled nano-structured materials.
Toshiyuki Yokoi Marie Iwama Ryota Watanabe Yasuhiro Sakamoto Osamu Terasaki Yoshihiro Kubota Junko. N. Kondo Tatsuya Okubo Takashi Tatsumi
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 22 Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo,Bunkyo-ku, Tokyo 113 Structural Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm,Sweden Division of Materials Science and Chemical Engineering, Graduate School of Engineering, Yokohama Nat
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）