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“NIR” = “Near-InfraRed”
“RT” = “Room Temperature”
carbon nanotube (CNT)–containing poly(dimethylsiloxane) (PDMS)
FROM:
Fudong Li, Honghao Hou, Jie Yin and Xuesong Jiang (School of Chemistry and Chemical Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China),
“Near-infrared light-responsive dynamic wrinkle patterns”, Science Advances, Vol. 4, No. 4, eaar5762, 6 April 2018, DOI: 10.1126/sciadv.aar5762
ABSTRACT: Dynamic micro/nanopatterns provide an effective approach for on-demand tuning of surface properties to realize a smart surface. We report a simple yet versatile strategy for the fabrication of near-infrared (NIR) light–responsive dynamic wrinkles by using a carbon nanotube (CNT)–containing poly(dimethylsiloxane) (PDMS) elastomer as the substrate for the bilayer systems, with various functional polymers serving as the top stiff layers. The high photon-to-thermal energy conversion of CNT leads to the NIR-controlled thermal expansion of the elastic CNT-PDMS substrate, resulting in dynamic regulation of the applied strain (ε) of the bilayer system by the NIR on/off cycle to obtain a reversible wrinkle pattern. The switchable surface topological structures can transfer between the wrinkled state and the wrinkle-free state within tens of seconds via NIR irradiation. As a proof-of-concept application, this type of NIR-driven dynamic wrinkle pattern was used in smart displays, dynamic gratings, and light control electronics.
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