Fabrication of large-area face-centered-cubic hard-sphere colloidal crystals by shear alignment

Autor:	John Rarity, T. J. Shepherd, P. R. Tapster, R. M. Amos, Stephen Kitson
Rok vydání:	2000
Předmět:	Condensed Matter::Soft Condensed Matter Crystal Phase transition Colloid Materials science Condensed matter physics Condensed Matter::Superconductivity Volume fraction Physics::Optics SPHERES Colloidal crystal Cubic crystal system Light scattering
Zdroj:	Physical Review E. 61:2929-2935
ISSN:	1095-3787 1063-651X
DOI:	10.1103/physreve.61.2929
Popis:	We make hard-sphere colloidal crystals from polymethyl methacrylate spheres suspended in organic solvents at high volume fractions. The samples are crystallized between two glass plates separated by 10-\ensuremath{\mu}m spacer beads. We study the optical scattering from these systems and describe methods for discriminating between the various crystal packings. Crystals formed simply by increasing the volume fraction beyond the liquid-solid phase transition tend to be small and predominantly random close packed. However, we find that by forming these crystals while applying controlled shear to the glass plates, large-area single crystals can be made. These crystals are much more regular and appear to be predominantly twinned face-centred cubic. The creation of single-orientation face-centred cubic crystals appears possible when shear is applied in one direction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dc877224c9b132c613b2ca7ddcfd10a5 https://doi.org/10.1103/physreve.61.2929 Zobrazit plný text záznamu