Gels and hydrogels

Gels are materials composed of a three-dimensional crosslinked polymer or colloidal network immersed in a fluid. They are usually soft and weak, but can be made hard and tough. Hydrogels are gels that have water as their main constituent.

Latest Research and Reviews

  • Research
    | Open Access

    Perovskite nanocrystals are promising emitters but suffer from environmental instabilities. Here, Park et al. introduce aromatic nonpolar organogels as a soft passivating matrix of perovskites, demonstrating highly efficient and environmentally stable luminescent nanocomposites.

    • Jae-Man Park
    • , Jinwoo Park
    • , Young-Hoon Kim
    • , Huanyu Zhou
    • , Younghoon Lee
    • , Seung Hyeon Jo
    • , Jinwoo Ma
    • , Tae-Woo Lee
    •  & Jeong-Yun Sun
  • Research
    | Open Access

    Musculoskeletal systems are recognized as a model for designing robust yet flexible microbots but the development of artificial musculoskeletal systems at nanoscale currently remains challenging. Here the authors report a laser programmed artificial musculoskeletal systems for prototyping 3D microbots, using relatively stiff SU-8 as the skeleton and pH-responsive proteins as the smart muscle.

    • Zhuo-Chen Ma
    • , Yong-Lai Zhang
    • , Bing Han
    • , Xin-Yu Hu
    • , Chun-He Li
    • , Qi-Dai Chen
    •  & Hong-Bo Sun
  • Research
    | Open Access

    The swelling-weakening behaviour of synthetic hydrogels is a major limitation to many applications. Here, the authors report on the covalent linkage of precursor loaded liposomes which are deformed upon hydrogel swelling and release precursor to form a secondary network strengthening the hydrogel.

    • Feng Wu
    • , Yan Pang
    •  & Jinyao Liu
  • Research
    | Open Access

    Light gated reactions are important due to their spatial and temporal control over the chemical processes but long wavelength activation of photocycloaddition reactions are rare. Here the authors introduce a green light induced [2+2] cycloaddition of a halochromic system, which allows for its photo-reactivity to be switched on and off by adjusting the pH of the system.

    • Kubra Kalayci
    • , Hendrik Frisch
    • , Vinh X. Truong
    •  & Christopher Barner-Kowollik
  • Research |

    A direct ink writing protocol for silica aerogels enables 3D printing of lightweight, miniaturized objects with complex shapes, with the possibility to easily add functionality by incorporating nanoparticles.

    • Shanyu Zhao
    • , Gilberto Siqueira
    • , Sarka Drdova
    • , David Norris
    • , Christopher Ubert
    • , Anne Bonnin
    • , Sandra Galmarini
    • , Michal Ganobjak
    • , Zhengyuan Pan
    • , Samuel Brunner
    • , Gustav Nyström
    • , Jing Wang
    • , Matthias M. Koebel
    •  & Wim J. Malfait
    Nature 584, 387-392

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