Copolymers morphological changes

Nanoscale Morphological Change of PS-b-P4VP Block Copolymer Films Induced by Site-Selective Doping of a Photoactive Chromophore... 

As aforementioned, diblock copolymer films have a wide variety of nanosized microphase separation structures such as spheres, cylinders, and lamellae. As described in the above subsection, photofunctional chromophores were able to be doped site-selectively into the nanoscale microdomain structures of the diblock copolymer films, resulting in nanoscale surface morphological change of the doped films. The further modification of the nanostructures is useful for obtaining new functional materials. Hence, in order to create further surface morphological change of the nanoscale microdomain structures, dopant-induced laser ablation is applied to the site-selectively doped diblock polymer films. 

Machida, S., Nakata, H., Yamada, K. and Itaya, A. (2007) Morphological change of a diblock copolymer film induced by selective doping of a photoactive chromophore./, Polym. Sci. B, Polym. Phys. Ed., 45, 368-375. 

Zhang L, Yu K, Eisenberg A. Ion-induced morphological changes in crew-cut aggregates of amphiphilic block copolymers. Science 1996 272 1777-1779. 

Minatti E, Viville P et al (2003) Micellar morphological changes promoted by cyclization of PS-b-PI copolymer DLS and AFM experiments. Macromolecules 36 4125-4133... 

Fig. 11 a Schematic illustration and b chemical structure of the diblock copolymer, c Illustration of the morphology changes with temperature increases from top to bottom represent three temperature regions below 100 °C, 100-150 °C, and above 150 °C. d TEM image of diblock film at room temperature, (e) SAXS intensity curves during heating at 2 °C/min. Reprinted with permission from [84]... 

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