De-mixing dynamics of a binary liquid system in a controlled-pore glass

Hellweg T, Schemmel S, Rother G, Brulet A, Eckerlebe H, Findenegg GH (2003)
The European Physical Journal E 12: 1-4.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Hellweg, ThomasUniBi ; Schemmel, S; Rother, G; Brulet, A; Eckerlebe, H; Findenegg, GH
Abstract / Bemerkung
The temperature-induced microphase separation of the binary liquid system iso-butyric acid+heavy water (iBA + D2O) in a mesoporous silica glass (CPG-10-75) of nominal pore width 7.5 nm was investigated by neutron spin-echo spectroscopy (NSE) and neutron small-angle scattering (SANS). Two mixtures of different composition were studied at different scattering angles at temperatures above and below the bulk phase transition temperature. The phase separation in the pore space is found to occur at a lower temperature than the bulk transition and extends over a significant temperature range. The effective diffusion coefficient derived from NSE at low scattering angles is found to decrease by one order of magnitude from 70 C-circle to 20 C-circle. This observation is attributed to the growing size of concentration fluctuations having a cut-off at ca. 8 nm, which corresponds to the mean pore size. The dynamics of the concentration fluctuations appears to be strongly influenced by the confinement in the pores, as it differs strongly from the bulk behaviour. These results are consistent with the preliminary results of the SANS study.
Erscheinungsjahr
2003
Zeitschriftentitel
The European Physical Journal E
Band
12
Seite(n)
1-4
ISSN
1292-8941
eISSN
1292-895X
Page URI
https://pub.uni-bielefeld.de/record/2000192

Zitieren

Hellweg T, Schemmel S, Rother G, Brulet A, Eckerlebe H, Findenegg GH. De-mixing dynamics of a binary liquid system in a controlled-pore glass. The European Physical Journal E. 2003;12:1-4.
Hellweg, T., Schemmel, S., Rother, G., Brulet, A., Eckerlebe, H., & Findenegg, G. H. (2003). De-mixing dynamics of a binary liquid system in a controlled-pore glass. The European Physical Journal E, 12, 1-4. https://doi.org/10.1140/epjed/e2003-01-001-9
Hellweg, Thomas, Schemmel, S, Rother, G, Brulet, A, Eckerlebe, H, and Findenegg, GH. 2003. “De-mixing dynamics of a binary liquid system in a controlled-pore glass”. The European Physical Journal E 12: 1-4.
Hellweg, T., Schemmel, S., Rother, G., Brulet, A., Eckerlebe, H., and Findenegg, G. H. (2003). De-mixing dynamics of a binary liquid system in a controlled-pore glass. The European Physical Journal E 12, 1-4.
Hellweg, T., et al., 2003. De-mixing dynamics of a binary liquid system in a controlled-pore glass. The European Physical Journal E, 12, p 1-4.
T. Hellweg, et al., “De-mixing dynamics of a binary liquid system in a controlled-pore glass”, The European Physical Journal E, vol. 12, 2003, pp. 1-4.
Hellweg, T., Schemmel, S., Rother, G., Brulet, A., Eckerlebe, H., Findenegg, G.H.: De-mixing dynamics of a binary liquid system in a controlled-pore glass. The European Physical Journal E. 12, 1-4 (2003).
Hellweg, Thomas, Schemmel, S, Rother, G, Brulet, A, Eckerlebe, H, and Findenegg, GH. “De-mixing dynamics of a binary liquid system in a controlled-pore glass”. The European Physical Journal E 12 (2003): 1-4.

8 Zitationen in Europe PMC

Daten bereitgestellt von Europe PubMed Central.

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Hellweg T, Schemmel S, Rother G, Brûlet A, Eckerlebe H, Findenegg GH., Eur Phys J E Soft Matter 12 Suppl 1(), 2003
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