Spectroscopic Investigation of the Evolution of Fractal Nanoobjects in Film-Forming Sols of Orthosilicic Acid

The evolution of fractal nanoparticles of medium size and concentration, which are formed and dynamically change during hydrolytic polycondensation, has been investigated using IR spectroscopy. It is shown that the application of the Smoluchowski rapid coagulation model combined with analysis of the...

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Bibliographic Details
Published in:Technical physics 2018-11, Vol.63 (11), p.1687-1695
Main Authors: Averin, I. A., Igoshina, S. E., Karmanov, A. A., Pronin, I. A., Moshnikov, V. A., Terukov, E. I.
Format: Article
Language:English
Subjects:
ABSORPTION
ATOMIC FORCE MICROSCOPY
Classical and Continuum Physics
Coagulation
CONCENTRATION RATIO
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Evolution
Fractals
INFRARED SPECTRA
Infrared spectroscopy
NANOPARTICLES
Physical Electronics
Physics
Physics and Astronomy
SILICIC ACID
SOLS
Spectrum analysis
THIN FILMS
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Summary:The evolution of fractal nanoparticles of medium size and concentration, which are formed and dynamically change during hydrolytic polycondensation, has been investigated using IR spectroscopy. It is shown that the application of the Smoluchowski rapid coagulation model combined with analysis of the characteristic absorption line intensity in the IR spectra provides a satisfactory estimate of evolution processes occurring in sols of orthosilisic acid. The obtained spectroscopic dependences are compared qualitatively with atomic force microscopy data.
ISSN:1063-7842
1090-6525
DOI:10.1134/S106378421811004X