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Synthesis of Half‐Sphere/Half‐Funnel‐Shaped Silica Structures by Reagent Localization and the Role of Water in Shape Control
Author(s) -
Datskos Panos,
Polizos Georgios,
Cullen David A.,
Bhandari Mahabir,
Sharma Jaswinder
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201604130
Subject(s) - funnel , reagent , emulsion , rod , diffusion , dispersion (optics) , chemistry , materials science , chemical engineering , optics , organic chemistry , physics , engineering , thermodynamics , medicine , alternative medicine , pathology
Shape control of silica structures is demonstrated by localization of the reagents. A uniform dispersion of reagents provided straight silica rods, whereas localization of the reagents in the emulsion droplet periphery provided a new type of half‐sphere/half‐funnel structure. The effect of water concentration appeared to be related to the ease of diffusion of the silica precursor inside the emulsion droplet (i.e., the higher the water concentration, the lower the silica precursor diffusion).