Publication Type |
Journal Article |
Title |
Synthesis and Characterization of Perylenediimide Labeled Core-Shell Hybrid Silica-Polymer Nanoparticles |
Authors |
Tânia Ribeiro Carlos Baleizão José Paulo Farinha |
Groups |
|
Journal |
JOURNAL OF PHYSICAL CHEMISTRY C |
Year |
2009 |
Month |
October |
Volume |
113 |
Number |
42 |
Pages |
18082-18090 |
Abstract |
We have successfully synthesized core-shell nanoparticles with a silica fluorescent core and a methacrylate shell for application in photoactive high performance coatings and paints. Silica core particles with diameters between 270 and 440 nm and low polydispersity were labeled with a perylenediimide derivate with two terminal alkoxysilyl groups. Pure silica nanoparticles with equivalent diameters were also synthesized and surface modified with a second perylenediimide derivative. The photophysical properties of both sets of nanoparticles were studied for polarity environment dependence and dye aggregation. The fluorescent silica nanoparticles were surface modified with 3-(trimethoxysilyl)propyl methacrylate and used as seeds ill the emulsion polymerization of a butyl or methyl methacrylate shell. Fluorescence correlation spectroscopy (FCS) was used to characterize the core-shell nanoparticles, using the fluorescent silica particles to calibrate the system. Films cast from water dispersions of clean core-shell nanoparticles are flexible, transparent, and exhibit fluorescence under appropriate excitation. |
DOI |
http://dx.doi.org/10.1021/jp906748r |
ISBN |
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Publisher |
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Book Title |
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ISSN |
1932-7447 |
EISSN |
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Conference Name |
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Bibtex ID |
ISI:000270671100017 |
Observations |
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