BaSO4 crystals grown at an expanding liquid - Liquid interface in a radial hele-shaw cell show spontaneous large-scale assembly into filaments

Debabrata Rautaray, Arun Banpurkar, Sudhakar R. Sainkar, Abhay V. Limaye, Satish Ogale, Murali Sastry

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Control over the crystallography, morphology, and spontaneous organization of ceramic crystals are important goals in advanced materials engineering with important application potential. Most studies hitherto have concentrated on static charged interfaces as templates for the controlled nucleation and growth of ceramic crystals. In this communication, we show that BaSO4 crystals grown at a steadily expanding liquid-liquid interface populated by fatty acid molecules spontaneously organize themselves into highly linear superstructures over large length-scales. This experiment is realized in a radial Hele-Shaw cell where the liquid-liquid interfacial growth rate and consequently time scales such as arrival of surfactant molecules to the interface etc. may be readily modulated. Possible reasons for the regular assembly of barite crystals are discussed.

Original languageEnglish
Pages (from-to)449-452
Number of pages4
JournalCrystal Growth & Design
Issue number4
Publication statusPublished - Jul 2003
Externally publishedYes

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