title: Characterization and structural investigation of fractal porous-silica over an extremely wide scale range of pore size.
abstract: We have succeeded in creating Menger sponge-like fractal body, i.e., porous-silica samples with Menger sponge-like fractal geometries, by a novel template method utilizing template particles of alkylketene dimer (AKD) and a sol-gel synthesis of tetramethyl orthosilicate (TMOS). We report here the first experimental results on characterization and structural investigations of the fractal porous-silica samples prepared with various conditions such as calcination temperature and packing condition of the template particles. In order to characterize the fractal porous-silica samples, pore volume distribution, porosity and specific surface area were measured over an extremely wide scale from 1 nm to 100 microm by means of mercury porosimetry, (1)H NMR cryoporometry, nitrogen gas adsorption experiments together with direct evaluations of cross-sectional fractal dimension D(cs), and size limits of D(cs). We have found that the pore volume distribution and specific surface area of the fractal porous-silica samples can be discussed in terms of different fractal porous structures at different scale regions.
authors.affiliation: Nanotechnology Research Center, Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Ono
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Mayama
authors.forename: István
authors.initials: I
authors.lastname: Furó
authors.forename: Alexander I
authors.initials: AI
authors.lastname: Sagidullin
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Matsushima
authors.forename: Haruo
authors.initials: H
authors.lastname: Ura
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Uchiyama
authors.forename: Kaoru
authors.initials: K
authors.lastname: Tsujii