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Colloidal crystal growth monitored by Bragg diffraction interference fringes Justin J. Bohn, Alexander Tikhonov, Sanford A. Asher *
 

Summary: Colloidal crystal growth monitored by Bragg diffraction interference fringes
Justin J. Bohn, Alexander Tikhonov, Sanford A. Asher *
Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
a r t i c l e i n f o
Article history:
Received 9 November 2009
Accepted 26 April 2010
Available online 12 June 2010
Keywords:
CCA
Bragg diffraction
Interference fringes
Ordering
Growth kinetics
a b s t r a c t
We monitored the crystal growth kinetics of crystallization of a shear melted crystalline colloidal array
(CCA). The fcc CCA heterogeneously nucleates at the flow cell wall surface. We examined the evolution
of the (1 1 1) Bragg diffraction peak, and, for the first time, quantitatively monitored growth by measur-
ing the temporal evolution of the Bragg diffraction interference fringes. Modeling of the evolution of the
fringe patterns exposes the time dependence of the increasing crystal thickness. The initial diffusion-dri-

  

Source: Asher, Sanford A. - Department of Chemistry, University of Pittsburgh

 

Collections: Materials Science; Chemistry