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High-refractive-index tin sulfide core–shell spheres for photonic applications

Published online by Cambridge University Press:  20 March 2012

Xiaotao Peng  and
Anthony D. Dinsmore
Xiaotao Peng
Affiliation:
Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003
Anthony D. Dinsmore*
Affiliation:
Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003
*
b)Address all correspondence to this author. e-mail: dinsmore@physics.umass.edu
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Abstract

We describe the fabrication of core–shell colloidal spheres composed of a shell of tin sulfide and a core of polystyrene. The tin sulfide shell is deposited on micrometer-sized latex spheres using a sonochemical technique. By angle-dependent light scattering and electron microscopy, we find that the refractive index of the shell is 3.0 at a wave length of 1064 nm, and the shell’s thickness is controllable in the range of 30–60 nm. The resulting spheres have a narrow distribution of sizes, are stable in aqueous suspension, and are very strong scatterers in the near infrared with potential application in photonic band gap materials or other photonic devices.

Keywords

ColloidOptical propertiesCore/shell
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 9 , 14 May 2012 , pp. 1251 - 1256
Copyright
Copyright © Materials Research Society 2012

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