Conformation of Single Block Copolymer Chain in Two-Dimensional Microphase-Separated Structure Studied by Scanning Near-Field Optical Microscopy Export

@article{citeulike:4462895, abstract = {The localization and orientation of the symmetric diblock copolymer chain in a quasi-two-dimensional microphase-separated structure were studied by scanning near-field optical microscopy (SNOM). In the monolayer of poly(isobutyl methacrylate)-block-poly(octadecyl methacrylate) (PiBMA-b-PODMA), the individual PiBMA subchains were directly observed by SNOM, and the center of mass (CM) and orientational angle relative to the phase interface were examined at the single chain level. It was found that the position of the CM and the orientation of the PiBMA subchain in the lamellar structure were dependent on the curvature of the PiBMA/PODMA interface. As the interface was bent toward the objective chain, the block chain preferred the CM position closer to the domain center, and the conformation was strongly oriented perpendicularly to the domain interface. With increase of the curvature, the steric hindrance among the block chain increases, resulting in the stretched conformation.}, author = {Sekine, Ryojun and Aoki, Hiroyuki and Ito, Shinzaburo}, citeulike-article-id = {4462895}, citeulike-linkout-0 = {http://dx.doi.org/10.1021/jp901806h}, citeulike-linkout-1 = {http://pubs.acs.org/doi/abs/10.1021/jp901806h}, day = {21}, doi = {10.1021/jp901806h}, journal = {The Journal of Physical Chemistry B}, keywords = {nsom, polymers, sms}, month = {May}, number = {20}, pages = {7095--7100}, posted-at = {2009-05-05 02:46:18}, priority = {2}, title = {Conformation of Single Block Copolymer Chain in Two-Dimensional Microphase-Separated Structure Studied by Scanning Near-Field Optical Microscopy}, url = {http://dx.doi.org/10.1021/jp901806h}, volume = {113}, year = {2009} }

TY - JOUR ID - citeulike:4462895 L3 - citeulike-article-id:4462895 N2 - The localization and orientation of the symmetric diblock copolymer chain in a quasi-two-dimensional microphase-separated structure were studied by scanning near-field optical microscopy (SNOM). In the monolayer of poly(isobutyl methacrylate)-block-poly(octadecyl methacrylate) (PiBMA-b-PODMA), the individual PiBMA subchains were directly observed by SNOM, and the center of mass (CM) and orientational angle relative to the phase interface were examined at the single chain level. It was found that the position of the CM and the orientation of the PiBMA subchain in the lamellar structure were dependent on the curvature of the PiBMA/PODMA interface. As the interface was bent toward the objective chain, the block chain preferred the CM position closer to the domain center, and the conformation was strongly oriented perpendicularly to the domain interface. With increase of the curvature, the steric hindrance among the block chain increases, resulting in the stretched conformation. IS - 20 JF - The Journal of Physical Chemistry B EP - 7100 TI - Conformation of Single Block Copolymer Chain in Two-Dimensional Microphase-Separated Structure Studied by Scanning Near-Field Optical Microscopy VL - 113 SP - 7095 KW - nsom KW - polymers KW - sms AU - Sekine, Ryojun AU - Aoki, Hiroyuki AU - Ito, Shinzaburo PY - 2009/05/21/ UR - http://dx.doi.org/10.1021/jp901806h ER -