Silicene/poly(N-isopropylacrylamide) smart hydrogels as remote light-controlled switches

[Display omitted] Smart hydrogels with good flexibility and biocompatibility have been widely used. The common near-infrared (NIR) photothermal agents are facing a trade-off between good photothermal-conversion efficiency and high biocompatibility. Therefore, developing new metal-free photothermal a...

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Bibliographic Details
Published in:Journal of colloid and interface science 2022-09, Vol.621, p.205-212
Main Authors: Fang, Tiantian, Chen, Xifan, Yang, Changyu, Cao, Yaqi, Zhang, Junshi, Peng, WenChao, Li, Yang, Zhang, Fengbao, Fan, Xiaobin
Format: Article
Language:English
Subjects:
Acrylic Resins
Hydrogels
In situ polymerization
Infrared Rays
Near-infrared light response
poly(N-isopropylacrylamide)
Silicene
Smart hydrogels
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Summary:[Display omitted] Smart hydrogels with good flexibility and biocompatibility have been widely used. The common near-infrared (NIR) photothermal agents are facing a trade-off between good photothermal-conversion efficiency and high biocompatibility. Therefore, developing new metal-free photothermal agents with low cost, high biocompatibility and excellent phase stability is still in urgent need. In this study, we successfully combined poly(N-isopropylacrylamide) (PNIPAM) with the two-dimensional (2D) silicene nanosheets via the in situ polymerization method. Attributed to the thermal-responsive nature of PNIPAM and the excellent photothermal properties of 2D silicene, the obtained silicene/PNIPAM composite hydrogels exhibited dual thermal and NIR responsive properties. This smart hydrogel showed rapid, reversible and repeatable NIR light-responsive behaviors. The volume of this smart hydrogels can shrink significantly under NIR irradiation and recover to its original size without the NIR irradiation. Remote near-infrared light-controlled microfluidic pipelines and electronic switches based on obtained silicene/PNIPAM composite hydrogels were also demonstrated. This work significantly broadens the application prospects of silicene-based hydrogels in remote light-controlled devices.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2022.04.079