Cubic crystals from cubic colloids

Laura Rossi, Stefano Sacanna, William T M Irvine, Paul M. Chaikin, David J. Pine, Albert P. Philipse

Research output: Contribution to journalArticle

Abstract

We have studied the crystallization behavior of colloidal cubes by means of tunable depletion interactions. The colloidal system consists of novel micron-sized cubic particles prepared by silica deposition on hematite templates and various non-adsorbing water-soluble polymers as depletion agents. We have found that under certain conditions the cubes self-organize into crystals with a simple cubic symmetry, which is set by the size of the depletant. The dynamic of crystal nucleation and growth is investigated, monitoring the samples in time by optical microscopy. Furthermore, by using temperature sensitive microgel particles as depletant it is possible to fine tune depletion interactions to induce crystal melting. Assisting crystallization with an alternating electric field improves the uniformity of the cubic pattern allowing the preparation of macroscopic (almost defect-free) crystals that show visible Bragg colors.

Original languageEnglish (US)
Pages (from-to)4139-4142
Number of pages4
JournalSoft Matter
Volume7
Issue number9
DOIs
StatePublished - May 7 2011

Fingerprint

Colloids
colloids
Crystals
depletion
Crystallization
crystals
crystallization
Crystal symmetry
hematite
Silicon Dioxide
Optical microscopy
Polymers
Melting
Nucleation
templates
Electric fields
melting
interactions
nucleation
silicon dioxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Rossi, L., Sacanna, S., Irvine, W. T. M., Chaikin, P. M., Pine, D. J., & Philipse, A. P. (2011). Cubic crystals from cubic colloids. Soft Matter, 7(9), 4139-4142. https://doi.org/10.1039/c0sm01246g

Cubic crystals from cubic colloids. / Rossi, Laura; Sacanna, Stefano; Irvine, William T M; Chaikin, Paul M.; Pine, David J.; Philipse, Albert P.

In: Soft Matter, Vol. 7, No. 9, 07.05.2011, p. 4139-4142.

Research output: Contribution to journalArticle

Rossi, L, Sacanna, S, Irvine, WTM, Chaikin, PM, Pine, DJ & Philipse, AP 2011, 'Cubic crystals from cubic colloids', Soft Matter, vol. 7, no. 9, pp. 4139-4142. https://doi.org/10.1039/c0sm01246g
Rossi L, Sacanna S, Irvine WTM, Chaikin PM, Pine DJ, Philipse AP. Cubic crystals from cubic colloids. Soft Matter. 2011 May 7;7(9):4139-4142. https://doi.org/10.1039/c0sm01246g
Rossi, Laura ; Sacanna, Stefano ; Irvine, William T M ; Chaikin, Paul M. ; Pine, David J. ; Philipse, Albert P. / Cubic crystals from cubic colloids. In: Soft Matter. 2011 ; Vol. 7, No. 9. pp. 4139-4142.
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