Acharya Himadri, Yoon Bokyung, Park Youn Jung, Bae Insung, Park Cheolmin
Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Korea.
Macromol Rapid Commun. 2010 Jun 16;31(12):1071-7. doi: 10.1002/marc.201000032. Epub 2010 May 17.
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.
已开发出一种方法，可基于聚[苯乙烯-嵌段-(4-乙烯基吡啶)]（PS-b-P4VP）和聚[苯乙烯-嵌段-(丙烯酸)]（PS-b-PAA）共聚物的两亲性嵌段共聚物胶束，将含金属的酞菁染料分散在非极性介质中。极性的P4VP和PAA分别通过与过渡金属的氮轴向配位和μ-氧桥联二聚作用，有效地包封钴（II）、锰（II）和镍（II）酞菁染料。紫外可见吸收光谱中Q带随染料浓度的线性增强证实了染料的良好分散性。一种含有镍（II）酞菁染料的单层PS-b-P4VP胶束薄膜，能在局部区域有效吸收激光束以产生高于两个嵌段玻璃化转变温度的局部热量。在含染料薄膜上进行一维激光写入，可制造出一些亚微米宽的线条图案，其中嵌段共聚物的自组装纳米结构会因激光扫描产生的定向热量而改变。
