[1] ULA S W, TRAUGUTT N A, VOLPE R H et al. Liquid crystal elastomers: an introduction and review of emerging technologies[J]. Liquid Crystals Reviews, 6, 78-107(2018).

[2] TSCHIERSKE C. Liquid crystal engineering-new complex mesophase structures and their relations to polymer morphologies, nanoscale patterning and crystal engineering[J]. Chemical Society Reviews, 36, 1930-1970(2007).

[3] AMBULO C P, TASMIM S, WANG S T et al. Processing advances in liquid crystal elastomers provide a path to biomedical applications[J]. Journal of Applied Physics, 128, 140901(2020).

[4] WHITE T J, BROER D J. Programmable and adaptive mechanics with liquid crystal polymer networks and elastomers[J]. Nature Materials, 14, 1087-1098(2015).

[5] LAVRENTOVICH O D. Prepatterned liquid crystal elastomers as a step toward artificial morphogenesis[J]. Proceedings of the National Academy of Sciences of the United States of America, 115, 7171-7173(2018).

[6] MISTRY D, TRAUGUTT N A, SANBORN B et al. Soft elasticity optimises dissipation in 3D-printed liquid crystal elastomers[J]. Nature Communications, 12, 6677(2021).

[7] BOOTHBY J M, WARE T H. Dual-responsive, shape-switching bilayers enabled by liquid crystal elastomers[J]. Soft Matter, 13, 4349-4356(2017).

[8] WANG Y C, DANG A L, ZHANG Z F et al. Repeatable and reprogrammable shape morphing from photoresponsive gold nanorod/liquid crystal elastomers[J]. Advanced Materials, 32, 2004270(2020).

[9] WARE T H, PERRY Z P, MIDDLETON C M et al. Programmable liquid crystal elastomers prepared by thiol-ene photopolymerization[J]. ACS Macro Letters, 4, 942-946(2015).

[10] HEBNER T S, KORNER K, BOWMAN C N et al. Leaping liquid crystal elastomers[J]. Science Advances, 9, eade1320(2023).

[11] GUIN T, SETTLE M J, KOWALSKI B A et al. Layered liquid crystal elastomer actuators[J]. Nature Communications, 9, 2531(2018).

[12] FENG W, BROER D J, LIU D Q. Combined light and electric response of topographic liquid crystal network surfaces[J]. Advanced Functional Materials, 30, 1901681(2020).

[13] LI Y, LIU Y J, LUO D. Polarization dependent light-driven liquid crystal elastomer actuators based on photothermal effect[J]. Advanced Optical Materials, 9, 2001861(2021).

[14] ZENG H, WANI O M, WASYLCZYK P et al. Self-regulating iris based on light-actuated liquid crystal elastomer[J]. Advanced Materials, 29, 1701814(2017).

[15] HERBERT K M, FOWLER H E, MCCRACKEN J M et al. Synthesis and alignment of liquid crystalline elastomers[J]. Nature Reviews Materials, 7, 23-38(2021).

[16] LI M H, KELLER P. Artificial muscles based on liquid crystal elastomers[J]. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 364, 2763-2777(2006).

[17] THOMSEN D L, KELLER P, NACIRI J et al. Liquid crystal elastomers with mechanical properties of a muscle[J]. Macromolecules, 34, 5868-5875(2001).

[18] YU Z H, WANG Y M, ZHENG J Q et al. Fast-response bioinspired near-infrared light-driven soft robot based on two-stage deformation[J]. ACS Applied Materials & Interfaces, 14, 16649-16657(2022).

[19] ZENG H, WANI O M, WASYLCZYK P et al. Light-driven, caterpillar-inspired miniature inching robot[J]. Macromolecular Rapid Communications, 39, 1700224(2018).

[20] PALAGI S, MARK A G, REIGH S Y et al. Structured light enables biomimetic swimming and versatile locomotion of photoresponsive soft microrobots[J]. Nature Materials, 15, 647-653(2016).

[21] ZENG H, WASYLCZYK P, PARMEGGIANI C et al. Light-fueled microscopic walkers[J]. Advanced Materials, 27, 3883-3887(2015).

[22] PRÉVÔT M E, USTUNEL S, HEGMANN E. Liquid crystal elastomers—a path to biocompatible and biodegradable 3D-LCE scaffolds for tissue regeneration[J]. Materials, 11, 377(2018).

[23] WU J, YAO S L, ZHANG H et al. Liquid crystal elastomer metamaterials with giant biaxial thermal shrinkage for enhancing skin regeneration[J]. Advanced Materials, 33, 2106175(2021).

[24] OHM C, BREHMER M, ZENTEL R. Liquid crystalline elastomers as actuators and sensors[J]. Advanced Materials, 22, 3366-3387(2010).

[25] DE HAAN L T, SÁNCHEZ-SOMOLINOS C, BASTIAANSEN C M W et al. Engineering of complex order and the macroscopic deformation of liquid crystal polymer networks[J]. Angewandte Chemie International Edition, 51, 12469-12472(2012).

[26] PEI Z Q, YANG Y, CHEN Q M et al. Mouldable liquid-crystalline elastomer actuators with exchangeable covalent bonds[J]. Nature Materials, 13, 36-41(2014).

[27] ZHAO N, WANG X X, YAO L R et al. Actuation performance of a liquid crystalline elastomer composite reinforced by eiderdown fibers[J]. Soft Matter, 18, 1264-1274(2022).

[28] FINKELMANN H, KOCK H J, REHAGE G. Investigations on liquid crystalline polysiloxanes 3. Liquid crystalline elastomers—a new type of liquid crystalline material[J]. Die Makromolekulare Chemie, Rapid Communications, 2, 317-322(1981).

[29] YAKACKI C M, SAED M, NAIR D P et al. Tailorable and programmable liquid-crystalline elastomers using a two-stage thiol-acrylate reaction[J]. RSC Advances, 5, 18997-19001(2015).

[30] AHN C, LIANG X D, CAI S Q. Inhomogeneous stretch induced patterning of molecular orientation in liquid crystal elastomers[J]. Extreme Mechanics Letters, 5, 30-36(2015).

[31] YU L, SHAHSAVAN H, RIVERS G et al. Programmable 3D shape changes in liquid crystal polymer networks of uniaxial orientation[J]. Advanced Functional Materials, 28, 1802809(2018).

[32] BARNES M, VERDUZCO R. Direct shape programming of liquid crystal elastomers[J]. Soft Matter, 15, 870-879(2019).

[33] SHIN J, KANG M, TSAI T et al. Thermally functional liquid crystal networks by magnetic field driven molecular orientation[J]. ACS Macro Letters, 5, 955-960(2016).

[34] YANG H, BUGUIN A, TAULEMESSE J M et al. Micron-sized main-chain liquid crystalline elastomer actuators with ultralarge amplitude contractions[J]. Journal of the American Chemical Society, 131, 15000-15004(2009).

[35] NA Z S, LIU X, SUN P Z et al. Fabrication of guest-host display based on patterned assembly of liquid crystal[J]. Chinese Journal of Liquid Crystals and Displays, 38, 1014-1021(2023).

[36] BRÖMMEL F, BENZIE P, OSTERWINTER G J et al. Orientation behaviour of the minor director of homeotropically oriented nematic elastomers in mechanical fields[J]. Soft Matter, 9, 2646-2651(2013).

[37] BRANNUM M T, STEELE A M, VENETOS M C et al. Light control with liquid crystalline elastomers[J]. Advanced Optical Materials, 7, 1801683(2019).

[38] LI S C, LERCH M M, WATERS J T et al. Self-regulated non-reciprocal motions in single-material microstructures[J]. Nature, 605, 76-83(2022).

[39] YAO Y X, WATERS J T, SHNEIDMAN A V et al. Multiresponsive polymeric microstructures with encoded predetermined and self-regulated deformability[J]. Proceedings of the National Academy of Sciences of the United States of America, 115, 12950-12955(2018).

[40] SÁNCHEZ-FERRER A, FISCHL T, STUBENRAUCH M et al. Photo-crosslinked side-chain liquid-crystalline elastomers for microsystems[J]. Macromolecular Chemistry and Physics, 210, 1671-1677(2009).

[41] ICHIMURA K. Photoalignment of liquid-crystal systems[J]. Chemical Reviews, 100, 1847-1874(2000).

[42] WANG Y W, HE Y N, WANG X G. Photoinduced orientation of two dendritic azo amorphous molecular materials[J]. Chemical Journal of Chinese Universities, 33, 2351-2355(2012).

[43] KOWALSKI B A, TONDIGLIA V P, GUIN T et al. Voxel resolution in the directed self-assembly of liquid crystal polymer networks and elastomers[J]. Soft Matter, 13, 4335-4340(2017).

[44] UBE T, TSUNODA H, KAWASAKI K et al. Photoalignment in polysiloxane liquid-crystalline elastomers with rearrangeable networks[J]. Advanced Optical Materials, 9, 2100053(2021).

[45] SCHADT M, SCHMITT K, KOZINKOV V et al. Surface-induced parallel alignment of liquid crystals by linearly polymerized photopolymers[J]. Japanese Journal of Applied Physics, 31, 2155(1992).

[46] WEI B Y, HU W, MING Y et al. Generating switchable and reconfigurable optical vortices via photopatterning of liquid crystals[J]. Advanced Materials, 26, 1590-1595(2014).

[47] GUO Y B, JIANG M, PENG C H et al. High-resolution and high-throughput plasmonic photopatterning of complex molecular orientations in liquid crystals[J]. Advanced Materials, 28, 2353-2358(2016).

[48] MCCONNEY M E, MARTINEZ A, TONDIGLIA V P et al. Topography from topology: photoinduced surface features generated in liquid crystal polymer networks[J]. Advanced Materials, 25, 5880-5885(2013).

[49] WARE T H, MCCONNEY M E, WIE J J et al. Voxelated liquid crystal elastomers[J]. Science, 347, 982-984(2015).

[50] ZHI X X, BI H S, GAO Y S et al. Recent progress of research and applications of PI alignment layer for TFT-LCD device[J]. New Chemical Materials, 47, 1-6(2019).

[51] HUANG Z J, TSUI G C P, DENG Y et al. Bioinspired near-infrared light-induced ultrafast soft actuators with tunable deformation and motion based on conjugated polymers/liquid crystal elastomers[J]. Journal of Materials Chemistry C, 10, 12731-12740(2022).

[52] WANI O M, ZENG H, PRIIMAGI A. A light-driven artificial flytrap[J]. Nature Communications, 8, 15546(2017).

[53] XIA Y, CEDILLO-SERVIN G, KAMIEN R D et al. Guided folding of nematic liquid crystal elastomer sheets into 3D via patterned 1D microchannels[J]. Advanced Materials, 28, 9637-9643(2016).

[54] AHARONI H, XIA Y, ZHANG X Y et al. Universal inverse design of surfaces with thin nematic elastomer sheets[J]. Proceedings of the National Academy of Sciences of the United States of America, 115, 7206-7211(2018).

[55] KULARATNE R S, KIM H, BOOTHBY J M et al. Liquid crystal elastomer actuators: synthesis, alignment, and applications[J]. Journal of Polymer Science Part B: Polymer Physics, 55, 395-411(2017).

[56] PENG X R, WU S, SUN X H et al. 4D printing of freestanding liquid crystal elastomers via hybrid additive manufacturing[J]. Advanced Materials, 34, 2204890(2022).

[57] GUO Y B, SHAHSAVAN H, SITTI M. 3D Microstructures of liquid crystal networks with programmed voxelated director fields[J]. Advanced Materials, 32, 2002753(2020).

[58] GUO Y B, ZHANG J C, HU W Q et al. Shape-programmable liquid crystal elastomer structures with arbitrary three-dimensional director fields and geometries[J]. Nature Communications, 12, 5936(2021).

[59] KOTIKIAN A, TRUBY R L, BOLEY J W et al. 3D printing of liquid crystal elastomeric actuators with spatially programed nematic order[J]. Advanced Materials, 30, 1706164(2018).

[60] AMBULO C P, BURROUGHS J J, BOOTHBY J M et al. Four-dimensional printing of liquid crystal elastomers[J]. ACS Applied Materials & Interfaces, 9, 37332-37339(2017).

[61] TABRIZI M, WARE T H, SHANKAR M R. Voxelated molecular patterning in three-dimensional freeforms[J]. ACS Applied Materials & Interfaces, 11, 28236-28245(2019).

[62] WU Y H, ZHANG S, YANG Y et al. Locally controllable magnetic soft actuators with reprogrammable contraction-derived motions[J]. Science Advances, 8, eabo6021(2022).

[63] LAHIKAINEN M, ZENG H, PRIIMAGI A. Reconfigurable photoactuator through synergistic use of photochemical and photothermal effects[J]. Nature Communications, 9, 4148(2018).

[64] JIANG Z C, XIAO Y Y, TONG X et al. Selective decrosslinking in liquid crystal polymer actuators for optical reconfiguration of origami and light-fueled locomotion[J]. Angewandte Chemie, 131, 5386-5391(2019).

[65] ZENG X B, ZHOU T F, LI L et al. Reconfigurable liquid crystal elastomer director patterns for multi-mode shape morphing[J]. Crystals, 14, 357(2024).

[66] JIANG X Y, WANG R R, SUN J. Conductive hydrogels and their applications in flexible electronic devices[J]. Chinese Journal of Analytical Chemistry, 51, 1381-1390(2023).

[67] LV F H, LI C C, LI Y et al. Advance in applications of metal-organic gel[J]. Chinese Journal of Analytical Chemistry, 51, 160-171(2023).