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Fractal studies on titanium-silica aerogels using SMARTer

Putra, Erwin G. R. and Ikram, Abarrul and Bharoto, Bharoto and Santoso, E. and Fang, T. Chiar and Ibrahim, Noorddin M. M. and Mohamed, A. Aziz (2008) Fractal studies on titanium-silica aerogels using SMARTer. In: AIP Conference Proceedings. American Institute of Physics, USA, 130 -133 . ISBN 978-073540508-0

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Official URL: http://dx.doi.org/10.1063/1.2906047

Abstract

Power-law scattering approximation has been employed to reveal the fractal structures of solid-state titanium-silica aerogel samples. All small-angle neutron scattering (SANS) measurements were performed using 36 meters SANS BATAN spectrometer (SMARTer) at the neutron scattering laboratory (NSL) in Serpong, Indonesia. The mass fractal dimension of titanium-silica aerogels at low scattering vector q range increases from -1.4 to -1.92 with the decrease of acid concentrations during sol-gel process. These results are attributed to the titanium-silica aerogels that are growing to more polymeric and branched structures. At high scattering vector q range the Porod slope of -3.9 significantly down to -2.24 as the roughness of particle surfaces becomes higher. The cross over between these two regimes decreases from 0.4 to 0.16nm-1 with the increase of acid concentrations indicating also that the titanium-silica aerogels are growing.

Item Type:Book Section
Additional Information:ISBN: 978-073540508-0; International Conference on Neutron and X-ray Scattering 2007, ICNX 2007; Serpong and Bandung; 23 July 2007 through 31 July 2007
Uncontrolled Keywords:aerogels, fractals, power-law scattering, SANS
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
Divisions:Science
ID Code:12571
Deposited By: Liza Porijo
Deposited On:09 Jun 2011 08:17
Last Modified:09 Jun 2011 08:17

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