Electrophoretic assembly of colloidal crystals with optically tunable micropatterns
Article Abstract:
It has been possible to link the photochemical sensitivity of semiconductors with electric-field-induced assembly to form ordered arrays of micrometre-sized colloidal particles with tunable patterns. This research has shown the impact of current-density modulation (produced by ultraviolet light) on the electrophoretic deposition and assembly of colloid crystals. It was established that a conducting electrode alone is not sufficient for the modulation of colloidal assembly by ultraviolet light. This technique offers considerable potential for orchestrating electrophoretic deposition of optically tunable patterned arrays of small particles.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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Electric-field-induced pattern formation in colloidal dispersions
Article Abstract:
Electrohydrodynamic effects in non-aqueous suspensions can be utilized for the creation of patterned colloidal structures which have many applications in material processing. The behavior exhibited by electrorheological fluids and ferrofluids is attributed to the formation of such structures in the electric or magnetic field conditions. For example, if the conductivity of the surrounding fluid is lower than that of a particle-rich spherical region (bolus), then the electric field transforms the bolus into a prolate ellipsoid.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Microscopic patterning of orientated mesoscopic silica through guided growth
Article Abstract:
A method that allows tubule growth to be guided by infiltrating a reaction fluid into the microcapillaries of a mould is reported. The electric field is tangentially applied to the surface inducing electro-osmotic flow and enhancing the rates of silica polymerization around the tubules. Patterned bundles of orientated nanotubules remain on the surface after removal of the mould.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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