期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 36, 期 16, 页码 1505-1510出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500219
关键词
hydrogen bonding; photoisomerization; block copolymers; micelles; nanopatterns
资金
- National Natural Science Foundation of China [21274097, 21474069, 21334004]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Controlling the orientation and long-range order of nanostructures is a key issue in the self-assembly of block copolymer micelles. Herein, a versatile strategy is presented to transform one-component oxime-based block copolymer micelles into long-range ordered dense nanopatterns. Photoisomerization provides a straightforward and versatile approach to convert the hydrogen-bonding association from inward dimerization (E-type oxime motifs, slightly desolvated in ethyl acetate) into outward interchain association (Z-type ones, highly desolvated in ethyl acetate). This increases the glass transition temperature in bulk and converts swollen micelles into compact spherical micelles in solution. The reconstruction of these micelles on various substrates demonstrates that the phase transformation enables reconstruction of spherical micelles into mesoscopic sheets, nanorods, nanoworms, nanowires, networks, and eventually into long-range ordered and densely packed textile-like and lamellar nanopatterns on a macroscopic scale by adjusting E/Z-oxime ratio and solvent-evaporation rate.
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