TY - JOUR
T1 - Extension of size of monodisperse silica nanospheres and their well-ordered assembly
AU - Watanabe, Ryota
AU - Yokoi, Toshiyuki
AU - Kobayashi, Erina
AU - Otsuka, Yuki
AU - Shimojima, Atsushi
AU - Okubo, Tatsuya
AU - Tatsumi, Takashi
N1 - Funding Information:
This work was supported by Grant-in-Aid for Scientific Research (S) (No. 19106015) of Education, Culture, Sports, Science and Technology of Japan (MEXT). This work was also partly supported by Research and Development in a New Interdisciplinary Field Based on Nanotechnology and Materials Science Program of the Ministry of MEXT.
PY - 2011/8/1
Y1 - 2011/8/1
N2 - A liquid-phase method for preparing uniform-sized silica nanospheres (SNSs) 12nm in size and their three-dimensionally ordered arrangement upon solvent evaporation have recently been pioneered by us. Here we report the successful control of the sphere sizes in the wide range from 14 to 550nm by the seed regrowth method. In this method, the dispersion of SNSs 14nm in size as seeds was prepared in the emulsion system containing Si(OEt)4 (TEOS), water and arginine under weakly basic conditions (pH 9-10). An appropriate portion of this dispersion is added to the solution containing water, ethanol and arginine, and then TEOS is added. The additional TEOS introduced into the regrowth system contributed only to the resumed growth of the seeds, not to the formation of new silica particles. The size of interparticle pores was finely tuned by changing the size of the spheres. The preparation of three-dimensionally ordered porous carbons by using the colloidal array of silica nanospheres as a template is also reported.
AB - A liquid-phase method for preparing uniform-sized silica nanospheres (SNSs) 12nm in size and their three-dimensionally ordered arrangement upon solvent evaporation have recently been pioneered by us. Here we report the successful control of the sphere sizes in the wide range from 14 to 550nm by the seed regrowth method. In this method, the dispersion of SNSs 14nm in size as seeds was prepared in the emulsion system containing Si(OEt)4 (TEOS), water and arginine under weakly basic conditions (pH 9-10). An appropriate portion of this dispersion is added to the solution containing water, ethanol and arginine, and then TEOS is added. The additional TEOS introduced into the regrowth system contributed only to the resumed growth of the seeds, not to the formation of new silica particles. The size of interparticle pores was finely tuned by changing the size of the spheres. The preparation of three-dimensionally ordered porous carbons by using the colloidal array of silica nanospheres as a template is also reported.
KW - Basic amino acids
KW - Seed regrowth method
KW - Silica nanospheres
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U2 - 10.1016/j.jcis.2010.09.001
DO - 10.1016/j.jcis.2010.09.001
M3 - Article
C2 - 21570081
AN - SCOPUS:79957790565
SN - 0021-9797
VL - 360
SP - 1
EP - 7
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
IS - 1
ER -