Macroscopic Regulation of Hierarchical Nanostructures in Liquid-crystalline Block Copolymers towards Functional Materials

Feng Cai; Yu-Xuan Chen; Wen-Zhong Wang; Hai-Feng Yu

doi:10.1007/s10118-021-2531-1

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Macroscopic Regulation of Hierarchical Nanostructures in Liquid-crystalline Block Copolymers towards Functional Materials

REVIEW | Updated：2020-12-17

- Macroscopic Regulation of Hierarchical Nanostructures in Liquid-crystalline Block Copolymers towards Functional Materials
- Chinese Journal of Polymer Science Vol. 39, Issue 4, Pages: 397-416(2021)
- Affiliations：
  
  Department of Materials Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Engineering, Peking University, Beijing 100871, China
- Author bio：
  
  yuhaifeng@pku.edu.cn
- Funds：
- DOI：10.1007/s10118-021-2531-1
  CLC：
- Received：01 November 2020，
  
  Revised：2020-11-19，
  
  Accepted：23 November 2020，
  
  Online First：17 December 2020，
  
  Published：01 January 2021
- Accepted：
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Cai, F.; Chen, Y. X.; Wang, W. Z.; Yu, H. F. Macroscopic regulation of hierarchical nanostructures in liquid-crystalline block copolymers towards functional materials. Chinese J. Polym. Sci. 2021, 39, 397–416

Feng Cai, Yu-Xuan Chen, Wen-Zhong Wang, et al. Macroscopic Regulation of Hierarchical Nanostructures in Liquid-crystalline Block Copolymers towards Functional Materials[J]. Chinese Journal of Polymer Science, 2021, 39(4): 397-416.
Cai, F.; Chen, Y. X.; Wang, W. Z.; Yu, H. F. Macroscopic regulation of hierarchical nanostructures in liquid-crystalline block copolymers towards functional materials. Chinese J. Polym. Sci. 2021, 39, 397–416 DOI： 10.1007/s10118-021-2531-1.

Feng Cai, Yu-Xuan Chen, Wen-Zhong Wang, et al. Macroscopic Regulation of Hierarchical Nanostructures in Liquid-crystalline Block Copolymers towards Functional Materials[J]. Chinese Journal of Polymer Science, 2021, 39(4): 397-416. DOI： 10.1007/s10118-021-2531-1.

摘要

Abstract

The great potential of liquid-crystalline block copolymers (LCBCs) containing photoresponsive mesogens toward novel applications in photonics and nanotechnology has been attracting increasing attention

due to the combination of the inherent property of microphase separation of block copolymers and the hierarchically-assembled structures of liquid-crystalline polymers (LCPs). The periodically ordered nanostructures in bulk film of LCBCs can be acquired by supramolecular cooperative motion

derived from the interaction between liquid-crystalline elastic deformation and microphase separation

which are able to improve physical properties of polymer film toward advanced functional applications. Moreover

various micro/nano-patterned structures have been fabricated

via

light manipulation of photoresponsive LCBCs with good reproducibility and mass production. Thanks to recent developments in synthesis and polymerization techniques

diverse azobenzene-containing LCBCs have been designed

resulting in the creation of a wide variety of novel functions. This review illustrates recent progresses in macroscopic regulation of hierarchical nanostructures in LCBCs towards functional materials. The existing challenges are also discussed

showing perspectives for future studies.

关键词

Keywords

references

Fasolka, M. J.; Mayes, A. M. . Block copolymer thin films: physics and applications . Ann. Rev. Mater. Res. , 2001 . 31 323 - 355 . DOI: 10.1146/annurev.matsci.31.1.323 http://doi.org/10.1146/annurev.matsci.31.1.323 .

Bates, F. S.; Fredrickson, G. H. . Block copolymers-designer soft materials . Phys. Today , 1999 . 52 32 - 38 . .

Schacher, F.; Rupar, P.; Manners, I. . Functional block copolymers: nanostructured materials with emerging applications . Angew. Chem. Int. Ed. , 2012 . 51 7898 - 7921 . DOI: 10.1002/anie.201200310 http://doi.org/10.1002/anie.201200310 .

Sun, Z.; Chen, Z.; Zhang, W.; Choi, J.; Huang, C.; Jeong, G.; Coughlin, E. B.; Hsu, Y.; Yang, Z.; Lee, K.; Kuo, D.; Xiao, C.; Russell, T. P. . Directed self-assembly of poly(2-vinylpyridine)- b -polystyrene- b -poly(2-vinylpyridine) triblock copolymer with sub-15 nm spacing line patterns using a nanoimprinted photoresist template . Adv. Mater. , 2015 . 27 4364 - 4370 . DOI: 10.1002/adma.201501585 http://doi.org/10.1002/adma.201501585 .

Kim, J.; Yang, S.; Lee, Y.; Kim, Y. . Functional nanomaterials based on block copolymer self-assembly . Prog. Polym. Sci. , 2010 . 35 1325 - 1349 . DOI: 10.1016/j.progpolymsci.2010.06.002 http://doi.org/10.1016/j.progpolymsci.2010.06.002 .

Metwalli, E.; Korstgens, V.; Schlage, K.; Meier, R.; Kaune, G.; Buffet, A.; Couet, S.; Roth, S. V.; Rohlsberger, R.; Muller-Buschbaum, P. . Cobalt nanoparticles growth on a block copolymer thin film: a time-resolved GISAXS study . Langmuir , 2013 . 29 6331 - 6340 . DOI: 10.1021/la400741b http://doi.org/10.1021/la400741b .

Roth, S. V.; Santoro, G.; Risch, J. F. H.; Yu, S.; Schwartzkopf, M.; Boese, T.; Dohrmann, R.; Zhang, P.; Besner, B.; Bremer, P.; Rukser, D.; Rubhausen, M. A.; Terrill, N. J.; Staniec, P. A.; Yao, Y.; Metwalli, E.; Muller-Buschbaum, P. . Patterned diblock copolymer thin films as templates for advanced anisotropic metal nanostructures . ACS Appl. Mater. Interfaces , 2015 . 7 12470 - 12477 . DOI: 10.1021/am507727f http://doi.org/10.1021/am507727f .

Lu, X.; Li, J.; Zhu, D.; Xu, M.; Li, W.; Lu, Q. . Double-helical nanostructures with controllable handedness in bulk diblock copolymers . Angew. Chem. Int. Ed. , 2018 . 57 15148 - 15152 . DOI: 10.1002/anie.201809676 http://doi.org/10.1002/anie.201809676 .

Seki, T. . Light-directed alignment, surface morphing and related processes: recent trends . J. Mater. Chem. C , 2016 . 4 7895 - 7910 . DOI: 10.1039/C6TC02482C http://doi.org/10.1039/C6TC02482C .

Nagano, S. . Inducing planar orientation in side-chain liquid-crystalline polymer systems via interfacial control . Chem. Rec. , 2016 . 16 378 - 392 . DOI: 10.1002/tcr.201500232 http://doi.org/10.1002/tcr.201500232 .

Fukuhara, K.; Fujii, Y.; Nagashima, Y.; Hara, M.; Nagano, S.; Seki, T. . Liquid-crystalline polymer and block copolymer domain alignment controlled by free-surface segregation . Angew. Chem. Int. Ed. , 2013 . 52 5988 - 5991 . DOI: 10.1002/anie.201300560 http://doi.org/10.1002/anie.201300560 .

Fukuhara, K.; Nagano, S.; Hara, M.; Seki, T. . Free-surface molecular command systems for photoalignment of liquid crystalline materials . Nat. Commun. , 2014 . 5 3320 .

Yu, H. . Photoresponsive liquid-crystalline block copolymers: from photonics to nanotechnology . Prog. Polym. Sci. , 2014 . 39 781 - 815 . DOI: 10.1016/j.progpolymsci.2013.08.005 http://doi.org/10.1016/j.progpolymsci.2013.08.005 .

Yu, H. . Recent advances in photoresponsive liquid-crystalline polymers containing azobenzene chromophores . J. Mater. Chem. C , 2014 . 2 3047 - 3054 . .

Mao, G.; Wang, J.; Clingman, S. R.; Ober, C. K.; Chen, J. T.; Thomas, E. L. . Molecular design, synthesis, and characterization of liquid crystal-coil diblock copolymers with azobenzene side groups . Macromolecules , 1997 . 30 2556 - 2567 . DOI: 10.1021/ma9617835 http://doi.org/10.1021/ma9617835 .

Tian, Y.; Watanabe, K.; Kong, X.; Abe, J.; Iyoda, T. . Synthesis, nanostructures, and functionality of amphiphilic liquid crystalline block copolymers with azobenzene moieties . Macromolecules , 2002 . 35 3739 - 3747 . .

Asaoka, S.; Uekusa, T.; Tokimori, H.; Komura, M.; Iyoda, T.; Yamada, T.; Yoshida, H. . Normally oriented cylindrical nanostructures in amphiphilic PEO-LC diblock copolymers films . Macromolecules , 2011 . 44 7645 - 7658 . DOI: 10.1021/ma201119u http://doi.org/10.1021/ma201119u .

Yu, H.; Iyoda, T.; Ikeda, T. . Photoinduced alignment of nanocylinders by supramolecular cooperative motions . J. Am. Chem. Soc. , 2006 . 128 11010 - 11011 . DOI: 10.1021/ja064148f http://doi.org/10.1021/ja064148f .

Yu, H.; Li, J.; Ikeda, T.; Iyoda, T. . Macroscopic parallel nanocylinder array fabrication using a simple rubbing technique . Adv. Mater. , 2006 . 18 2213 - 2215 . DOI: 10.1002/adma.200600582 http://doi.org/10.1002/adma.200600582 .

Yu, H.; Kobayashi, T.; Hu, G. . Photocontrolled microphase separation in a nematic liquid-crystalline diblock copolymer . Polymer , 2011 . 52 1554 - 1561 . DOI: 10.1016/j.polymer.2011.01.053 http://doi.org/10.1016/j.polymer.2011.01.053 .

Nagano, S.; Koizuka, Y.; Murase, T.; Sano, M.; Shinohara, Y.; Amemiya, Y.; Seki, T. . Synergy effect on morphology switching: real-time observation of photo-orientation of microphase separation in a block copolymer . Angew. Chem. Int. Ed. , 2012 . 51 5884 - 5888 . DOI: 10.1002/anie.201201346 http://doi.org/10.1002/anie.201201346 .

Sano, M.; Hara, M.; Nagano, S.; Shinohara, Y.; Amemiya, Y.; Seki, T. . New aspects for the hierarchical cooperative motions in photoalignment process of liquid crystalline block copolymer films . Macromolecules , 2015 . 48 2217 - 2223 . DOI: 10.1021/acs.macromol.5b00299 http://doi.org/10.1021/acs.macromol.5b00299 .

Sano, M.; Shan, F.; Hara, M.; Nagano, S.; Shinohara, Y.; Amemiya, Y.; Seki, T. . Dynamic photoinduced realignment processes in photoresponsive block copolymer films: effects of the chain length and block copolymer architecture . Soft Matter , 2015 . 11 5918 - 5925 . DOI: 10.1039/C5SM01140J http://doi.org/10.1039/C5SM01140J .

Cai, F.; Zheng, F.; Lu, X.; Lu, Q. . Control of the alignment of liquid crystal molecules on a sequence-polymerized film by surface migration and polarized light irradiation . Polym. Chem. , 2017 . 8 7316 - 7324 . DOI: 10.1039/C7PY01576C http://doi.org/10.1039/C7PY01576C .

Yu, H.; Ikeda, T. . Photocontrollable liquid-crystalline actuators . Adv. Mater. , 2011 . 23 2149 - 2180 . DOI: 10.1002/adma.201100131 http://doi.org/10.1002/adma.201100131 .

Ikeda, T. . Photomodulation of liquid crystal orientations for photonic applications . J. Mater. Chem. , 2003 . 13 2037 - 2057 . DOI: 10.1039/b306216n http://doi.org/10.1039/b306216n .

Yu, H.; Kobayashi, T.; Yang, H. . Liquid-crystalline ordering helps block copolymer self-assembly . Adv. Mater. , 2011 . 23 3337 - 3344 . DOI: 10.1002/adma.201101106 http://doi.org/10.1002/adma.201101106 .

Barrett, C. J.; Yager, K. G.; Mamiya, J.; Ikeda, T. . Photo-mechanical effects in azobenzene-containing soft materials . Soft Matter , 2007 . 3 1249 - 1261 . DOI: 10.1039/b705619b http://doi.org/10.1039/b705619b .

Han, D.; Tong, X.; Zhao, Y. . Block copolymers comprising p-conjugated and liquid crystalline subunits: induction of macroscopic nanodomain orientation . Angew. Chem. Int. Ed. , 2010 . 49 9162 - 9165 . DOI: 10.1002/anie.201004445 http://doi.org/10.1002/anie.201004445 .

Intelligent stimuli responsive materials: from well-defined nanostructures to applications . Li, Q. Ed. John Wiley & amp; Sons, Hoboken, NJ, 2013 .

Zheng, Z.; Li, Y.; Bisoyi, H.; Wang, L.; Bunning, T.; Li, Q. . Three-dimensional control of the helical axis of a chiral nematic liquid crystal by light . Nature , 2016 . 531 352 - 356 . DOI: 10.1038/nature17141 http://doi.org/10.1038/nature17141 .

Bisoyi, H.; Li, Q. . Light-directed dynamic chirality inversion in functional self-organized helical superstructures . Angew. Chem. Int. Ed. , 2016 . 55 2994 - 3010 . DOI: 10.1002/anie.201505520 http://doi.org/10.1002/anie.201505520 .

Zhao, Y.; Tong, X.; Zhao, Y. . Photoinduced microphase separation in block copolymers: exploring shape incompatibility of mesogenic side groups . Macromol. Rapid Commun. , 2010 . 31 986 - 990 . DOI: 10.1002/marc.200900892 http://doi.org/10.1002/marc.200900892 .

Bisoyi, H.; Li, Q. . Light-driven liquid crystalline materials: from photo-induced phase transitions and property modulations to applications . Chem. Rev. , 2016 . 116 15089 - 15166 . DOI: 10.1021/acs.chemrev.6b00415 http://doi.org/10.1021/acs.chemrev.6b00415 .

Hu, J.; Li, X.; Ni, Y.; Ma S.; Yu, H. . A programmable and biomimetic photo-actuator: a composite of a photo-liquefiable azobenzene derivative and commercial plastic film . J. Mater. Chem. C , 2018 . 6 10815 - 10821 . DOI: 10.1039/C8TC03693D http://doi.org/10.1039/C8TC03693D .

Hoshino, M.; Uchida, E.; Norikane, Y.; Azumi, R.; Nozawa, S.; Tomita, A.; Sato, T.; Adachi, S.; Koshihara, S. . Crystal melting by light: X-ray crystal structure analysis of an azo crystal showing photoinduced crystal-melt transition . J. Am. Chem. Soc. , 2014 . 136 9158 - 9164 . DOI: 10.1021/ja503652c http://doi.org/10.1021/ja503652c .

Han, G. D.; Park, S. S.; Liu, Y.; Zhitomirsky, D.; Cho, E.; Dinca, M.; Grossman, J. C. . Photon energy storage materials with high energy densities based on diacetylene-azobenzene derivatives . J. Mater. Chem. A , 2016 . 4 16157 - 16165 . DOI: 10.1039/C6TA07086H http://doi.org/10.1039/C6TA07086H .

Han, G. D.; Deru, J. H.; Cho, E. N.; Grossman, J. C. . Optically-regulated thermal energy storage in diverse organic phase-change materials . Chem. Commun. , 2018 . 54 10722 - 10725 . DOI: 10.1039/C8CC05919E http://doi.org/10.1039/C8CC05919E .

Seki, T. . Dynamic photoresponsive functions in organized layer systems comprised of azobenzene-containing polymers . Polym. J. , 2004 . 36 435 - 454 . DOI: 10.1295/polymj.36.435 http://doi.org/10.1295/polymj.36.435 .

Seki, T. . Smart photoresponsive polymer systems organized in two dimensions . Bull. Chem. Soc. Jpn. , 2007 . 80 2084 - 2109 . DOI: 10.1246/bcsj.80.2084 http://doi.org/10.1246/bcsj.80.2084 .

Zhao, Y.; He, J. . Azobenzene-containing block copolymers: the inter-play of light and morphology enables new functions . Soft Matter , 2009 . 5 2686 - 2693 . DOI: 10.1039/b821589h http://doi.org/10.1039/b821589h .

Kawatsuki, N. . Photoalignment and photoinduced molecular reorientation of photosensitive materials . Chem. Lett. , 2011 . 40 548 - 554 . DOI: 10.1246/cl.2011.548 http://doi.org/10.1246/cl.2011.548 .

Wang, Y.; Urbas, A.; Li, Q. . Reversible visible-light tuning of self-organized helical superstructures enabled by unprecedented light-driven axially chiral molecular switches . J. Am. Chem. Soc. , 2012 . 134 3342 - 3345 . DOI: 10.1021/ja211837f http://doi.org/10.1021/ja211837f .

Yun, X.; Tang, B.; Xiong, Z.; Wang, X. . Understanding self-assembly, colloidal behavior and rheological properties of graphene derivatives for high-performance supercapacitor fabrication . Chinese J. Polym. Sci. , 2020 . 38 423 - 434 . DOI: 10.1007/s10118-020-2411-0 http://doi.org/10.1007/s10118-020-2411-0 .

Wang, Y.; Urbas, A.; Li, Q. . Light-driven chiral molecular switches or motors in liquid crystals . Adv. Mater. , 2012 . 24 1926 - 1945 . DOI: 10.1002/adma.201200241 http://doi.org/10.1002/adma.201200241 .

Li, J.; Blake, J.; Delaney, C. . Template-and vacuum-ultraviolet-assisted fabrication of an Ag-nanoparticle array on flexible and rigid substrates . Adv. Mater. , 2007 . 19 1267 - 1271 . DOI: 10.1002/adma.200602851 http://doi.org/10.1002/adma.200602851 .

Li, J.; Kamata, K.; Komura, M.; Yamada, T.; Yoshida, H.; Iyoda, T. . Anisotropic ion conductivity in liquid crystalline diblock copolymer membranes with perpendicularly oriented PEO cylindrical domains . Macromolecules , 2007 . 40 8125 - 8128 . DOI: 10.1021/ma071821s http://doi.org/10.1021/ma071821s .

Watanabe, S.; Fujiwara, R.; Hada, M.; Okazaki, Y.; Iyoda, T. . Site-specific recognition of nanophase-separated surfaces of amphiphilic block copolymers by hydrophilic and hydrophobic gold nanoparticles . Angew. Chem. Int. Ed. , 2007 . 46 1120 - 1123 . DOI: 10.1002/anie.200603516 http://doi.org/10.1002/anie.200603516 .

Darling, S. B. . Directing the self-assembly of block copolymers . Prog. Polym. Sci. , 2007 . 32 1152 - 1204 . DOI: 10.1016/j.progpolymsci.2007.05.004 http://doi.org/10.1016/j.progpolymsci.2007.05.004 .

Lodge, T. P. . Block copolymers: past successes and future challenges . Macromol. Chem. Phys. , 2003 . 204 265 - 273 . DOI: 10.1002/macp.200290073 http://doi.org/10.1002/macp.200290073 .

Hawker, C. J.; Russell, T. P. . Block copolymer lithography: merging “bottom-up” with “top-down” processes . MRS Bull. , 2005 . 30 952 - 965 . DOI: 10.1557/mrs2005.249 http://doi.org/10.1557/mrs2005.249 .

Ruzette, A. V.; Leibler, A. L. . Block copolymers in tomorrow’s plastics . Nat. Mater. , 2005 . 4 19 - 31 . DOI: 10.1038/nmat1295 http://doi.org/10.1038/nmat1295 .

Wu, J.; Yi, Z.; Lu, X.; Chen, S.; Lu, Q. . Formation and properties of liquid crystalline supramolecules with anisotropic fluorescence emission . Polym. Chem. , 2014 . 5 2567 - 2573 . DOI: 10.1039/c3py01544k http://doi.org/10.1039/c3py01544k .

Yu, H.; Asaoka, A.; Shishido, A.; Iyoda, T.; Ikeda T. . Photoinduced nanoscale cooperative motion in a novel well-defined triblock copolymer . Small , 2007 . 3 768 - 771 . DOI: 10.1002/smll.200600724 http://doi.org/10.1002/smll.200600724 .

Yu, H.; Shishido, A.; Iyoda, T.; Ikeda, T. . Novel wormlike nanostructure self-assembled in a well-defined liquid-crystalline diblock copolymer with azobenzene moieties . Macromol. Rapid Commun. , 2007 . 28 927 - 931 . DOI: 10.1002/marc.200600901 http://doi.org/10.1002/marc.200600901 .

Ravi, P.; Sin, S.; Gan, L.; Gan, Y.; Tam, K.; Xia, X.; Hu, X. . New water soluble azobenzene-containing diblock copolymers: synthesis and aggregation behavior . Polymer , 2005 . 46 137 - 146 . DOI: 10.1016/j.polymer.2004.11.009 http://doi.org/10.1016/j.polymer.2004.11.009 .

Cui, L.; Tong, X.; Yan, X.; Liu, G.; Zhao, Y. . Photoactive thermoplastic elastomers of azobenzene-containing triblock copolymers prepared through atom transfer radical polymerization . Macromolecules , 2004 . 37 7097 - 7104 . DOI: 10.1021/ma048995j http://doi.org/10.1021/ma048995j .

Qi, B.; Yavrian, A.; Galstian, T.; Zhao, Y. . Liquid crystalline ionomers containing azobenzene mesogens: phase stability, photoinduced birefringence and holographic grating . Macromolecules , 2005 . 38 3079 - 3086 . DOI: 10.1021/ma0473869 http://doi.org/10.1021/ma0473869 .

Discher, D.; Eisenberg, A. . Polymer vesicles . Science , 2002 . 297 967 - 974 . DOI: 10.1126/science.1074972 http://doi.org/10.1126/science.1074972 .

Zhao, Y. . Photocontrollable block copolymer micelles: what can we control? . J. Mater. Chem. , 2009 . 19 4887 - 4895 . DOI: 10.1039/b819968j http://doi.org/10.1039/b819968j .

Huang, S.; Chen, Y.; Ma, S.; Yu, H. . Hierarchical self-assembly in liquid-crystalline block copolymers enabled by chirality transfer . Angew. Chem. Int. Ed. , 2018 . 57 12524 - 12528 . DOI: 10.1002/anie.201807379 http://doi.org/10.1002/anie.201807379 .

Lynd, N. A.; Meuler, A. J.; Hillmyer, M. A. . Polydispersity and block copolymer self-assembly . Prog. Polym. Sci. , 2008 . 33 875 - 893 . DOI: 10.1016/j.progpolymsci.2008.07.003 http://doi.org/10.1016/j.progpolymsci.2008.07.003 .

Takano, A.; Kamaya, I.; Takahashi, Y.; Matsushita, Y. . Effect of loop/bridge conformation ratio on elastic properties of the sphere-forming ABA triblock copolymers: preparation of samples and determination of loop/bridge ratio . Macromolecules , 2005 . 38 9718 - 9723 . DOI: 10.1021/ma050712f http://doi.org/10.1021/ma050712f .

Whitesides, G. M.; Grzybowski, B. . Self-assembly at all scales . Science , 2002 . 295 2418 - 2421 . DOI: 10.1126/science.1070821 http://doi.org/10.1126/science.1070821 .

Komura, M.; Iyoda, T. . AFM cross-sectional imaging of perpendicularly oriented nanocylinder structures of microphase-separated block copolymer films by crystal-like cleavage . Macromolecules , 2007 . 40 4106 - 4108 . DOI: 10.1021/ma0704008 http://doi.org/10.1021/ma0704008 .

Watanabe, K.; Yoshida, H.; Kamata, K.; Iyoda, T. . Direct TEM observation of perpendicularly oriented nanocylinder structure in amphiphilic liquid crystalline block copolymer thin films . Trans. Mater. Res. Soc. Jpn. , 2005 . 30 377 - 381 . .

Komura, M.; Watanabe, K.; Iyoda, T.; Yamada, T.; Yoshida, H.; Iwasaki, Y. . Laboratory-GISAXS measurements of block copolymer films with highly ordered and normally oriented nanocylinders . Chem. Lett. , 2009 . 38 408 - 409 . DOI: 10.1246/cl.2009.408 http://doi.org/10.1246/cl.2009.408 .

Ikkala, O.; Brinke, G. . Functional materials based on self-assembly of polymeric supramolecules . Science , 2002 . 295 2407 - 2409 . DOI: 10.1126/science.1067794 http://doi.org/10.1126/science.1067794 .

Zoelen, W.; Brinke, G. . Thin films of complexed block copolymers . Soft Matter , 2009 . 5 1568 - 1582 . DOI: 10.1039/b817093b http://doi.org/10.1039/b817093b .

Tung, S. H.; Kalarickal, N. C.; Mays, J. W.; Xu, T. . Hierarchical assemblies of block-copolymer-based supramolecules in thin films . Macromolecules , 2008 . 41 6453 - 6462 . DOI: 10.1021/ma800726r http://doi.org/10.1021/ma800726r .

Korhonen, J. T.; Verho, T.; Rannou, P.; Ikkala, O. . Self-assembly and hierarchies in pyridine-containing homopolymers and block copolymers with hydrogen-bonded cholesteric side-chains . Macromolecules , 2010 . 43 1507 - 1514 . DOI: 10.1021/ma9021604 http://doi.org/10.1021/ma9021604 .

Wu, S.; Bubeck, C. . Macro- and microphase separation in block copolymer supramolecular assemblies induced by solvent annealing . Macromolecules , 2013 . 46 3512 - 3518 . DOI: 10.1021/ma400104d http://doi.org/10.1021/ma400104d .

Berreman, D. W. . Solid surface shape and the alignment of an adjacent nematic liquid crystal . Phys. Rev. Lett. , 1972 . 28 1683 - 1686 . DOI: 10.1103/PhysRevLett.28.1683 http://doi.org/10.1103/PhysRevLett.28.1683 .

Reiter, G.; Gastelein, G.; Hoerner, P.; Riess, G.; Blumen, A.; Sommer, J. . Nanometer-scale surface patterns with long-range order created by crystallization of diblock copolymers . Phys. Rev. Lett. , 1999 . 83 3844 - 3847 . DOI: 10.1103/PhysRevLett.83.3844 http://doi.org/10.1103/PhysRevLett.83.3844 .

Uekusa, T.; Nagano, S.; Seki, T. . Unique molecular orientation in a smectic liquid crystalline polymer film attained by surface-initiated graft polymerization . Langmuir , 2007 . 23 4642 - 4645 . DOI: 10.1021/la063467h http://doi.org/10.1021/la063467h .

Uekusa, T.; Nagano, S.; Seki, T. . Highly ordered in-plane photoalignment attained by the brush architecture of liquid crystalline azobenzene polymer . Macromolecules , 2009 . 42 312 - 318 . DOI: 10.1021/ma802010x http://doi.org/10.1021/ma802010x .

Haque, H. A.; Nagano, S.; Seki, T. . Lubricant effect of flexible chain in the photoinduced motions of surface-grafted liquid crystalline azobenzene polymer brush . Macromolecules , 2012 . 45 6095 - 6103 . DOI: 10.1021/ma300843x http://doi.org/10.1021/ma300843x .

Sano, M.; Hara, M.; Nagano, S.; Shinohara, Y.; Amemiya Y.; Seki, T. . New aspects for the hierarchical cooperative motions in photoalignment process of liquid crystalline block copolymer films . Macromolecules , 2015 . 48 2217 - 2223 . DOI: 10.1021/acs.macromol.5b00299 http://doi.org/10.1021/acs.macromol.5b00299 .

Sano, M.; Shan, F.; Hara, M.; Nagano, S.; Shinohara, Y.; Amemiya Y.; Seki, T. . Dynamic photoinduced realignment processes in photoresponsive block copolymer films: effects of the chain length and block copolymer architecture . Soft Matter , 2015 . 11 5918 - 5925 . DOI: 10.1039/C5SM01140J http://doi.org/10.1039/C5SM01140J .

Haque, H. A.; Hara, M.; Nagano, S.; Seki, T. . Photoinduced in-plane motions of azobenzene mesogens affected by the flexibility of underlying amorphous chains . Macromolecules , 2013 . 46 8275 - 8283 . DOI: 10.1021/ma401536r http://doi.org/10.1021/ma401536r .

Morikawa, Y.; Nagano, S.; Watanabe, K.; Kamata, K.; Iyoda, T.; Seki, T. . Optical alignment and patterning of nanoscale microdomains in a block copolymer thin film . Adv. Mater. , 2006 . 18 883 - 886 . DOI: 10.1002/adma.200502573 http://doi.org/10.1002/adma.200502573 .

Wang, T.; Li, X.; Dong, Z.; Huang, S.; Yu, H. . Vertical orientation of nanocylinders in liquid-crystalline block copolymers directed by light . ACS Appl. Mater. Interfaces , 2017 . 9 24864 - 24872 . DOI: 10.1021/acsami.7b06086 http://doi.org/10.1021/acsami.7b06086 .

Nickmans, K.; Bogels, G. M.; Sanchez-Somolinos, C.; Murphy, J. N.; Leclere, P.; Voets, I. K.; Schenning, A. P. H. J. . 3D orientational control in self-assembled thin films with sub-5 nm features by light . Small , 2017 . 13 1701043 - 1701053 . DOI: 10.1002/smll.201701043 http://doi.org/10.1002/smll.201701043 .

Sano, M.; Nakamura, S.; Hara, M.; Nagano, S.; Shinohara, Y.; Amemiya, Y.; Seki, T. . Pathways toward photoinduced alignment switching in liquid crystalline block copolymer films . Macromolecules , 2014 . 47 7178 - 7186 . DOI: 10.1021/ma501803g http://doi.org/10.1021/ma501803g .

Chen, Y.; Huang, S.; Wang, T.; Yu, H. . Enhanced ordering and efficient photoalignment of nanostructures in block copolymers enabled by halogen bond . Macromolecules , 2020 . 53 1486 - 1493 . DOI: 10.1021/acs.macromol.9b02686 http://doi.org/10.1021/acs.macromol.9b02686 .

Yu, H.; Shishido, A.; Li, J.; Kamata, K.; Iyoda, T.; Ikeda, T. . Stable macroscopic nanocylinder arrays in an amphiphilic diblock liquid-crystalline copolymer with successive hydrogen bonds . J. Mater. Chem. , 2007 . 17 3485 - 3488 . DOI: 10.1039/b705748b http://doi.org/10.1039/b705748b .

Huang, S.; Pang, L.; Chen, Y.; Zhou, L.; Fang, S.; Yu, H. . Hydrogen bond induces hierarchical self-assembly in liquid-crystalline block copolymers . Macromol. Rapid Commun. , 2018 . 39 1700783 DOI: 10.1002/marc.201700783 http://doi.org/10.1002/marc.201700783 .

Priimagi, A.; Cavallo, G.; Forni, A.; Gorynsztejn-Leben, M.; Kaivola, M.; Metrangolo, P.; Milani, R.; Shishido, A.; Pilati, T.; Resnati, G.; Terraneo, G. . Halogen bonding versus hydrogen bonding in driving self-assembly and performance of light-responsive supramolecular polymers . Adv. Funct. Mater. , 2012 . 22 2572 - 2579 . DOI: 10.1002/adfm.201200135 http://doi.org/10.1002/adfm.201200135 .

Kravchenko, A.; Shevchenko, A.; Ovchinnikov, V.; Priimagi, A.; Kaivola, M. . Optical interference lithography using azobenzene-functionalized polymers for micro- and nanopatterning of silicon . Adv. Mater. , 2011 . 23 4174 - 4177 . DOI: 10.1002/adma.201101888 http://doi.org/10.1002/adma.201101888 .

Yu, Y.; Nakano, M.; Ikeda, T. . Directed bending of a polymer film by light-miniaturizing a simple photomechanical system could expand its range of applications . Nature , 2003 . 425 145 DOI: 10.1038/425145a http://doi.org/10.1038/425145a .

Zhang, L.; Liang, H.; Jacob, J.; Naumov, P. . Photogated humidity-driven motility . Nat. Commun. , 2015 . 6 7429 - 7440 . DOI: 10.1038/ncomms8429 http://doi.org/10.1038/ncomms8429 .

Priimagi, A.; Saccone, M.; Cavallo, G.; Shishido, A.; Pilati, T.; Metrangolo, P.; Resnati, G. . Photoalignment and surface-relief-grating formation are efficiently combined in low-molecular-weight halogen-bonded complexes . Adv. Mater. , 2012 . 24 345 - 352 . .

Priimagi, A.; Cavallo, G.; Metrangolo, P.; Resnati, G. . The halogen bond in the design of functional supramolecular materials: recent advances . Acc. Chem. Res. , 2013 . 46 2686 - 2695 . DOI: 10.1021/ar400103r http://doi.org/10.1021/ar400103r .

Cheng, X.; Miao, T.; Yin, L.; Ji, Y.; Li, Y.; Zhang, Z.; Zhang, W.; Zhu, X. . In situ controlled construction of a hierarchical supramolecular chiral liquid-crystalline polymer assembly . Angew. Chem. Int. Ed. , 2020 . 59 9669 - 9677 . DOI: 10.1002/anie.202001657 http://doi.org/10.1002/anie.202001657 .

Chen, Y.; Huang, S.; Wang, T.; Dong, Z.; Yu, H. . Confined self-assembly enables stabilization and patterning of nanostructures in liquid-crystalline block copolymers . Macromolecules , 2019 . 52 1892 - 1898 . DOI: 10.1021/acs.macromol.8b02435 http://doi.org/10.1021/acs.macromol.8b02435 .

Kim, D. Y.; Tripathy, S. K.; Li, L.; Kumar, J. . Laser-induced holographic surface relief gratings on nonlinear optical polymer films . Appl. Phys. Lett. , 1995 . 66 1166 - 1168 . DOI: 10.1063/1.113845 http://doi.org/10.1063/1.113845 .

Yu, H.; Okano, K.; Shishido, A.; Ikeda, T.; Kamata, K.; Komura, M.; Iyoda, T. . Enhancement of surface-relief gratings recorded in amphiphilic liquid-crystalline diblock copolymer by nanoscale phase separation . Adv. Mater. , 2005 . 17 2184 - 2188 . DOI: 10.1002/adma.200500346 http://doi.org/10.1002/adma.200500346 .

Yu, H.; Naka, Y.; Shishido, A.; Iyoda, T.; Ikeda, T. . Effect of recording time on grating formation and enhancement in an amphiphilic diblock liquid-crystalline copolymer . Mol. Cryst. Liq. Cryst. , 2009 . 498 29 - 39 . DOI: 10.1080/15421400802612094 http://doi.org/10.1080/15421400802612094 .

Lee, S.; Shin, J.; Lee, Y. H.; Fan, S.; Park, J. K. . Directional photofluidization lithography for nanoarchitectures with controlled shapes and sizes . Nano Lett. , 2010 . 10 296 - 304 . DOI: 10.1021/nl903570c http://doi.org/10.1021/nl903570c .

Bai, H.; Du, C.; Zhang, A.; Li, L. . Breath figure arrays: unconventional fabrications, functionalizations, and applications . Angew. Chem. Int. Ed. , 2013 . 52 12240 - 12255 . DOI: 10.1002/anie.201303594 http://doi.org/10.1002/anie.201303594 .

Widawski, G.; Rawiso, M.; Francois, B. . Self-organized honeycomb morphology of star-polymer polystyrene films . Nature , 1994 . 369 387 - 389 . DOI: 10.1038/369387a0 http://doi.org/10.1038/369387a0 .

Chen, S.; Lu, X.; Hu, Y.; Lu, Q. . Biomimetic honeycomb-patterned surface as the tunable cell adhesion scaffold . Biomater. Sci. , 2015 . 3 85 - 93 . DOI: 10.1039/C4BM00233D http://doi.org/10.1039/C4BM00233D .

Ye, Q.; Chen, S.; Zhu, D.; Lu, X.; Lu, Q. . Preparation of aggregation-induced emission dots for long-term two-photon cell imaging . J. Mater. Chem. B , 2015 . 3 3091 - 3097 . .

Wang, W.; Du, C.; Wang, X.; He, X.; Lin, J.; Li, L.; Lin, S. . Directional photomanipulation of breath figure arrays . Angew. Chem. Int. Ed. , 2014 . 53 12116 - 12119 . DOI: 10.1002/anie.201407230 http://doi.org/10.1002/anie.201407230 .

Wang, W.; Shen, D.; Li, X.; Yao, Y.; Lin, J.; Wang, A.; Yu, J.; Wang, Z.; Hong, S.; Lin, Z.; Lin, S. . Light-driven shape-memory porous films with precisely controlled dimensions . Angew. Chem. Int. Ed. , 2018 . 57 2139 - 2143 . DOI: 10.1002/anie.201712100 http://doi.org/10.1002/anie.201712100 .

Chen, D.; Liu, H.; Kobayashi, T.; Yu, H. . Fabrication of regularly patterned microporous films by self-organization of an amphiphilic liquid-crystalline diblock copolymer in a dry environment . Macromol. Mater. Eng. , 2010 . 295 26 - 31 . DOI: 10.1002/mame.200900178 http://doi.org/10.1002/mame.200900178 .

Mukai, K.; Hara, M.; Nagano, S.; Seki, T. . High-density liquid-crystalline polymer brushes formed by surface segregation and self-assembly . Angew. Chem. Int. Ed. , 2016 . 128 14234 - 14238 . DOI: 10.1002/ange.201607786 http://doi.org/10.1002/ange.201607786 .

Cai, F.; Huang, Z.; Zheng, F.; Lu, X.; Lu, Q. . Enhancement of the photoalignment stability of block copolymer brushes by anchor segments . Macromol. Chem. Phys. , 2018 . 219 1800153 DOI: 10.1002/macp.201800153 http://doi.org/10.1002/macp.201800153 .

Zhou, H.; Xue, C.; Weis, P.; Suzuki, Y.; Huang, S.; Koynov, K.; Auernhammer, G. K.; Berger, R.; Butt, H. J.; Wu, S. . Photoswitching of glass transition temperatures of azobenzene-containing polymers induces reversible solid-to-liquid transitions . Nat. Chem. , 2017 . 9 145 - 151 . DOI: 10.1038/nchem.2625 http://doi.org/10.1038/nchem.2625 .

Ito, S.; Akiyama, H.; Sekizawa, R.; Mori, M.; Yoshida, M.; Kihara, H. . Light-induced reworkable adhesives based on ABA-type triblock copolymers with azopolymer termini . ACS Appl. Mater. Interfaces , 2018 . 10 32649 - 32658 . DOI: 10.1021/acsami.8b09319 http://doi.org/10.1021/acsami.8b09319 .

White, T. J.; Broer, D. J. . Programmable and adaptive mechanics with liquid crystal polymer networks and elastomers . Nat. Mater. , 2015 . 14 1087 - 1098 . DOI: 10.1038/nmat4433 http://doi.org/10.1038/nmat4433 .

Lv, J.; Liu, Y.; Wei, J.; Chen, E.; Qin, L.; Yu, Y. . Photocontrol of fluid slugs in liquid crystal polymer microactuators . Nature , 2016 . 537 179 - 184 . DOI: 10.1038/nature19344 http://doi.org/10.1038/nature19344 .

Yin, L.; Han, L.; Ge, F.; Tong, X.; Zhang, W.; Soldera, A.; Zhao, Y. . A novel side-chain liquid crystal elastomer exhibiting anomalous reversible shape change . Angew. Chem. Int. Ed. , 2020 . 59 15129 - 15134 . DOI: 10.1002/anie.202003904 http://doi.org/10.1002/anie.202003904 .

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