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Block Copolymer Micelles with Near Infrared Metal Phthalocyanine Dyes for Laser Induced Writing
Author(s) -
Acharya Himadri,
Yoon Bokyung,
Park Youn Jung,
Bae Insung,
Park Cheolmin
Publication year - 2010
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201000032
Subject(s) - copolymer , phthalocyanine , materials science , micelle , styrene , polymer chemistry , amphiphile , nickel , photochemistry , nanotechnology , polymer , chemistry , organic chemistry , aqueous solution , composite material , metallurgy
A route has been developed to disperse metal‐containing phthalocyanine dyes in a non‐polar medium based on amphiphilic block copolymer micelles of poly[styrene‐ block ‐(4‐vinylpyridine)] (PS‐ b ‐P4VP) and poly[styrene‐ block ‐(acrylic acid)] (PS‐ b ‐PAA) copolymers. Polar P4VP and PAA efficiently encapsulate cobalt( II ), manganese( II ), and nickel( II ) phthalocyanine dyes by axial coordination of nitrogen and µ‐oxo bridged dimerization with the transition metals, respectively. Good dispersion of the dyes is confirmed by the linear enhancement of Q‐bands in UV–vis absorption spectra with dye concentration. A thin monolayered PS‐ b ‐P4VP micelle film that contained a nickel( II ) phthalocyanine dye which efficiently adsorbs a laser beam on a localized area to generate a local heat higher than the glass transition temperatures of both blocks. One‐dimensional laser writing on the dye‐containing film allows the fabrication of a few submicrometer wide line patterns in which the self‐assembled nanostructure of the block copolymer is modified by the directional heat arising from laser scanning.