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Effect of electrolyte and evaporation rate on the structural features of dried silica monolayer films
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
2002 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 18, 9327-9333 p.Article in journal (Refereed)
Abstract [en]

The structural features of colloidal monolayers formed from dilute silica suspensions dried on a glass substrate have been studied using optical microscopy and image analysis. We determined the size of the hexagonally ordered domains from the pair correlation function and the defect population using an analysis based on Delaunay triangulation. The addition of small amounts of salt resulted in drastic structural changes, which was attributed to the loss of colloidal stability as the suspension dries and the electrolyte concentration increases. The size of the ordered domains decreased exponentially with increasing amounts of added salt and the concentration of large defects increased suggesting that aggregation and particle adhesion to the substrate inhibit rearrangement and ordering. The evaporation rate was controlled by varying the relative humidity; we found that colloidal monolayers with the largest ordered domains and the lowest concentration of stacking faults were formed at intermediate relative humidity.

Place, publisher, year, edition, pages
2002. Vol. 18, 9327-9333 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27201OAI: oai:DiVA.org:ri-27201DiVA: diva2:1054205
Note
A1535Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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