Direct observation of a crossover from heterogeneous traveling wave to Liesegang pattern formation

M. Zrínyi, László Gálfi, Éva Smidróczki, Z. Rácz, Ferenc Horkay

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

A study of Liesegang band formation is presented with emphasis on the dependence of the precipitation pattern on its solubility. The formation of Cr(OH)3 precipitate has been studied by diffusing NaOH into chemically cross-linked poly(vinyl alcohol) gel containing Cr(NO3)3. The precipitate can sparingly redissolve in the surplus of NaOH. The formation, together with the dissolution of the precipitate, coupled with diffusion leads to a propagating band, instead of a final static pattern. A crossover from traveling band to Liesegang pattern formation has been also observed. A model, based on reaction-diffusion phenomenon, allows us to correlate the band movement with various kinetic and chemical processes.

Original languageEnglish
Pages (from-to)1618-1620
Number of pages3
JournalJournal of Physical Chemistry
Volume95
Issue number4
Publication statusPublished - 1991

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traveling waves
Precipitates
crossovers
precipitates
Dissolution
Alcohols
Gels
Solubility
dissolving
Kinetics
alcohols
solubility
gels
kinetics

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Direct observation of a crossover from heterogeneous traveling wave to Liesegang pattern formation. / Zrínyi, M.; Gálfi, László; Smidróczki, Éva; Rácz, Z.; Horkay, Ferenc.

In: Journal of Physical Chemistry, Vol. 95, No. 4, 1991, p. 1618-1620.

Research output: Contribution to journalArticle

Zrínyi, M. ; Gálfi, László ; Smidróczki, Éva ; Rácz, Z. ; Horkay, Ferenc. / Direct observation of a crossover from heterogeneous traveling wave to Liesegang pattern formation. In: Journal of Physical Chemistry. 1991 ; Vol. 95, No. 4. pp. 1618-1620.
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