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. Author manuscript; available in PMC: 2020 Sep 27.
Published in final edited form as: Nat Chem. 2020 Mar 27;12(4):363–371. doi: 10.1038/s41557-020-0444-1

Figure 5. Shape changes of structures containing light-responsive domains.

Figure 5

a. PNIPAm structures containing embedded gold nanoparticles (AuNP-PNIPAm) contract when illuminated with green light (λ = 530 nm). b, Selective light-activated contraction of domains in a AuNP-PNIPAm hydrogel structure by using an aperture-restricted green light source. c, Two modes of deformation of a structure containing PNIPAm (white spheres) and AuNP-PNIPAm (pink spheres) domains. The structure contracts isotropically when heated to 42°C, and curls when irradiated with green light at 25°C. Scale bars correspond to 250 μm. Green dotted circles represent the regions of the structures irradiated with green light in b and c.