Ultrastretchable Graphene-Based Molecular Barriers for Chemical Protection, Detection, and Actuation.

Ultrastretchable Graphene-Based Molecular Barriers for Chemical Protection, Detection, and Actuation.
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可用于化学保护,检测和致动的超湿石墨烯分子屏障。

DOI:
10.1021/acsnano.7b05961
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发表时间:
2018-01-23
期刊:
影响因子:
17.1
通讯作者:
Hurt RH
Hurt RH
中科院分区:
材料科学1区
文献类型:
--
作者:
Chen PY;Zhang M;Liu M;Wong IY;Hurt RH

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A wide range of technologies require barrier films to impede molecular transport between the external environment and a desired internal microclimate. Adding stretchability to barrier films would enable the applications in packaging, textiles, and flexible devices, but classical barrier materials utilized dense, ordered molecular architectures that easily fracture under small tensile strain. Here, we show that textured graphene-based coatings can serve as ultra-stretchable molecular barriers expandable to 1500% areal strain through programmed unfolding that mimics the elasticity of polymers. These coatings retain barrier function under large deformation and can be conformally applied to planar or curved surfaces, where they are washfast and mechanically robust to cycling. These graphene-polymer bilayer structures also function as sensors or actuators by transducing chemical stimuli into mechanical deformation and electrical resistance change through asymmetric polymer swelling. These results may enable multifunctional fabrics that integrate chemical protection, sensing and actuation, with further applications as selective barriers, membranes, stretchable electronics, or soft robotics.
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