Solvent-Induced Ordering in Diblock Copolymer Thin Films

@article{citeulike:2782327, abstract = {Thin films of block copolymers (BC) are the focus of intensive investigations due to their self-assembly into well-ordered periodic structures. 1) In the present work, we investigate the microdomain morphology in symmetric PS-b-PMMA diblock copolymer thin films 'annealed' by different selective solvents vapor. 2, 3) PMMA hexagonally cylindrical microdomains oriented normal to the surface (Fig. 1a) can form by tuning the film thickness (less than L o ), the solvent selectivity (selective for PMMA) and solvent annealing time. Thickness confinement and solvent induced the change of film boundary condition are shown to be responsible for the formation of morphology. The resulted nanostructured films turn out to be sensitive to the surrounding medium, i.e., their morphologies and surface properties can be reversibly switchable upon exposure to solvent vapor selective for PS (Fig. 1b). Furthermore, by mixing the symmetric BC with homopolymers and block copolymer, the cylindrical domain sizes can be continuously tuned.}, author = {Peng, Juan and Xuan, Yu and Li, Binyao and Han, Yanchun }, citeulike-article-id = {2782327}, journal = {Polymeric Materials Science and Engineering}, keywords = {bcp, self-assembly, templated}, posted-at = {2008-05-10 05:05:40}, priority = {2}, title = {Solvent-Induced Ordering in Diblock Copolymer Thin Films}, url = {http://www-ca2.csa.com/ids70/view\_record.php?id=2\&\#38;recnum=0\&\#38;SID=82a791c1febb258ac497b59d281602b9\&\#38;mark\_id=search\%3A2\%3A0\%2C0\%2C1}, volume = {93}, year = {2005} }

TY - JOUR ID - citeulike:2782327 TI - Solvent-Induced Ordering in Diblock Copolymer Thin Films JF - Polymeric Materials Science and Engineering VL - 93 N2 - Thin films of block copolymers (BC) are the focus of intensive investigations due to their self-assembly into well-ordered periodic structures. 1) In the present work, we investigate the microdomain morphology in symmetric PS-b-PMMA diblock copolymer thin films 'annealed' by different selective solvents vapor. 2, 3) PMMA hexagonally cylindrical microdomains oriented normal to the surface (Fig. 1a) can form by tuning the film thickness (less than L o ), the solvent selectivity (selective for PMMA) and solvent annealing time. Thickness confinement and solvent induced the change of film boundary condition are shown to be responsible for the formation of morphology. The resulted nanostructured films turn out to be sensitive to the surrounding medium, i.e., their morphologies and surface properties can be reversibly switchable upon exposure to solvent vapor selective for PS (Fig. 1b). Furthermore, by mixing the symmetric BC with homopolymers and block copolymer, the cylindrical domain sizes can be continuously tuned. KW - bcp KW - self-assembly KW - templated AU - Peng, Juan AU - Xuan, Yu AU - Li, Binyao AU - Han, Yanchun PY - 2005///Fall UR - http://www-ca2.csa.com/ids70/view_record.php?id=2&recnum=0&SID=82a791c1febb258ac497b59d281602b9&mark_id=search%3A2%3A0%2C0%2C1 ER -