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Synthesis and utilization of monodisperse hollow polymeric particles in photonic crystals

Xu, X and Asher, SA (2004) Synthesis and utilization of monodisperse hollow polymeric particles in photonic crystals. Journal of the American Chemical Society, 126 (25). 7940 - 7945. ISSN 0002-7863

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Abstract

We developed a process to fabricate 150-700 nm monodisperse polymer particles with 100-500 nm hollow cores. These hollow particles were fabricated via dispersion polymerization to synthesize a polymer shell around monodisperse SiO2 particles. The SiO2 cores were then removed by HF etching to produce monodisperse hollow polymeric particle shells. The hollow core size and the polymer shell thickness, can be easily varied over significant size ranges. These hollow polymeric particles are sufficiently monodisperse that upon centrifugation from ethanol they form well-ordered close-packed colloidal crystals that diffract light. After the surfaces are functionalized with sulfonates, these particles self-assemble into crystalline colloidal arrays in deionized water. This synthetic method can also be used to create monodisperse particles with complex and unusual morphologies. For example, we synthesized hollow particles containing two concentric-independent, spherical polymer shells, and hollow silica particles which contain a central spherical silica core. In addition, these hollow spheres can be used as template microreactors. For example, we were able to fabricate monodisperse polymer spheres containing high concentrations of magnetic nanospheres formed by direct precipitation within the hollow cores.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Xu, X
Asher, SAasher@pitt.eduASHER
Date: 30 June 2004
Date Type: Publication
Journal or Publication Title: Journal of the American Chemical Society
Volume: 126
Number: 25
Page Range: 7940 - 7945
DOI or Unique Handle: 10.1021/ja049453k
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 0002-7863
MeSH Headings: Alkanesulfonates--chemistry; Biocompatible Materials--chemical synthesis; Colloids--chemistry; Crystallization; Image Processing, Computer-Assisted; Light; Microscopy, Electron--methods; Nanotechnology; Particle Size; Photons; Polymers--chemical synthesis; Silicon Dioxide--chemistry
PubMed ID: 15212543
Date Deposited: 08 Feb 2013 20:52
Last Modified: 23 Jun 2018 13:57
URI: http://d-scholarship.pitt.edu/id/eprint/17174

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