Complex shape deformations of homogeneous poly(N-isopropylacrylamide)/graphene oxide hydrogels programmed by local NIR irradiation

Abstract

The homogeneous PNIPAM/GO hydrogels could undergo complex shape deformations (e.g., imitating the postures of human) under local NIR irradiation.

Nanoclay Reinforced Self‐Cross‐Linking Poly(N‐Hydroxyethyl Acrylamide) Hydrogels with Integrated High Performances

“…Among them, nanocomposite hydrogels (NC gels) have attracted great attention for a long time . Incorporation of inorganic nanoparticles into hydrogels can strongly affect the mechanical properties due to polymer–nanoparticle interactions.…”

“…[23][24][25][26] Among them, nanocomposite hydrogels (NC gels) have attracted great attention for a long time. [27][28][29][30] Incorporation of inorganic nanoparticles into hydrogels can strongly affect the mechanical properties due to polymer-nanoparticle interactions. Laponite, a synthetic hectorite-type clay, is one of the most commonly used inorganic fillers in hydrogels.…”

Photolithographically Patterned Hydrogels with Programmed Deformations

“…[23][24][25][26][27] Deformations of hydrogels are usually induced by the mismatch of internal stress which is relatedt ot he heterogeneous swelling/de-swellingo ft he material. [22,23] There are generally two ways for build-up of internal stress and thus controllable deformationso fh ydrogels:( i) heterogeneouss timuli in one hydrogel to induce nonuniform response throughout the hydrogel, [28,29] or (ii)heterogeneous structurei no ne hydrogel, in which different regionsh ave different response to the uniform stimulation. [30,31] The first strategy usually relies on the localized photo irradiation.…”

Sunlight‐Driven Water Transport via a Reconfigurable Pump

“…This efficiency of sunlight-driven water transport is significantly higher than the previously reported carbon-based solar evaporation structures (Figure 3d). [24] Only as tandard sunlight lamp is required to realize aremote control of water launch and cease. Noteworthy,t his is the first report of sunlight powered water transport.…”

“…Sunlight irradiation, which is of much lower energy density than nearinfrared and safer than UV,i sd esirable in practical application. [24] Only as tandard sunlight lamp is required to realize aremote control of water launch and cease.…”