Jump to main content
Jump to site search

Issue 21, 2012
Previous Article Next Article

Anisotropic photonic crystal building blocks: colloids tuned from mushroom-caps to dimers

Author affiliations

Abstract

Nonspherical polystyrene particles tuned from collapsed spheres (mushroom cap and hemisphere shapes) to two-lobed dimers are synthesized by seeded emulsion polymerization. The presence of a swelling solvent and additions of divinylbenzene crosslinker facilitate shape control through directing phase separation of the polymer network and the monomer in the swollen particles as well as the solvent release behavior. Confocal microscopy of the particles, dyed in the initial swelling and polymerization stage followed by a second stage, differentiates the locations of effective seeds and second stage polymerized material which dictate the external particle morphology. The anisotropic particles are prepared in sufficient quantity and uniformity to self-organize into colloidal crystal and rotator structures, as is demonstrated with a mushroom cap-shaped particle system condensed under confinement. Structural transitions follow the drive to maximize packing efficiency at systematically varied confinement heights. Confocal microscopy confirms monolayer, buckled and bilayer thin films with unconventional orientational ordering.

Graphical abstract: Anisotropic photonic crystal building blocks: colloids tuned from mushroom-caps to dimers

Back to tab navigation

Supplementary files

Article information


Submitted
06 Jan 2012
Accepted
23 Mar 2012
First published
13 Apr 2012

J. Mater. Chem., 2012,22, 10507-10513
Article type
Paper

Anisotropic photonic crystal building blocks: colloids tuned from mushroom-caps to dimers

E. Y. K. Fung, K. Muangnapoh and C. M. Liddell Watson, J. Mater. Chem., 2012, 22, 10507
DOI: 10.1039/C2JM00129B

Search articles by author

Spotlight

Advertisements