Fluorescent organosilica micro- and nanoparticles with controllable size

Vogel, R., Surawski, P.T., Littleton, B. N., Miller, C., Lawrie, G. A., Battersby, B. J. and Trau, M. (2007) Fluorescent organosilica micro- and nanoparticles with controllable size. Journal of Colloid and Interface Science, 310 1: 144-150. doi:10.1016/j.jcis.2007.01.092


Author Vogel, R.
Surawski, P.T.
Littleton, B. N.
Miller, C.
Lawrie, G. A.
Battersby, B. J.
Trau, M.
Title Fluorescent organosilica micro- and nanoparticles with controllable size
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
1095-7103
Publication date 2007-06-01
Sub-type Article (original research)
DOI 10.1016/j.jcis.2007.01.092
Volume 310
Issue 1
Start page 144
End page 150
Total pages 7
Editor D. T. Wasan
Place of publication New York, U.S.A.
Publisher Academic Press
Collection year 2008
Language eng
Subject 240401 Optics and Opto-electronic Physics
C1
780102 Physical sciences
780103 Chemical sciences
0306 Physical Chemistry (incl. Structural)
Formatted abstract
This paper reports on the synthesis of uniformly dye-doped organosilica particles with narrow size distribution. The particle size can be controlled from tenths of nanometers up to several micrometers, whilst still maintaining monodispersity. Microparticles were observed to swell in various solvents up to ~2.5 times their original volume, suggesting the presence of a gel-like internal structure. As shown by confocal microscopy, this morphological control of particle swelling has important implications for the encoding of the nano/micro particles with organic dyes, such as rhodamine B isothiocyanate. Swelling allows the dye to penetrate the organosilica matrix and produce uniformly dye-doped nano- and microparticles. Finally, we suggest a coagulation model for the particle formation which significantly differs from conventional Stöber synthesis.
© 2007 Elsevier Inc. All rights reserved.

Keyword Colloids
Ormosil
Organosilica
Nanoparticles
Microspheres
Dyes
Biomolecules
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Tue, 15 Apr 2008, 23:47:04 EST by Jenny Robinson on behalf of Faculty of Science