fig5

Figure 5. Optical actuation of LCEs. (A) Illustration of LCE/CNT composite filaments composed of RM82, CNCs, and CNTs. The bottom panels show the actuation of LCE/CNT using infrared light. Scale bars, 1 cm. Reproduced with permission^[92] by CC-YB; (B) LCE-based nanocomposites fabricated by depositing gold solution on the surface of the fiber and locally swelling the fiber before UV exposure. The LCE-based nanocomposite fiber undergoes bending deformations when actuated by waveguided light. Scale bars, 100 nm at the top panel and 5 mm at the bottom. Reproduced with permission^[40]. Copyright 2019, WILEY-VCH; (C) illustration of the preparation of the azobenzene-functionalized liquid crystalline elastomers (LCE/azo) by aza-Michael addition reaction and the photopolymerization of the end-capped diacrylate oligomers. The optical images in the bottom panel show the shape morphing of LCE/azo subjected to 365 nm irradiation (100 mW/cm^-2). Scale bar, 5 mm. Reproduced with permission^[41]. Copyright 2016, WILEY-VCH; (D) bending and flattening of the ferroelectric LCE film upon alternate irradiation with UV and visible light at room temperature. Scale bar, 2 mm. Reproduced with permission^[112]. Copyright 2007, WILEY-VCH.