Opto-Electronic Engineering, Volume. 49, Issue 2, 210356-1(2022)
Laser fabrication of light/voltage-responsive slippery liquid-infused porous substrate (SLIPS)
Zhizhen Jiao1... Xingchen Han1, Hao Zhou1, and Dongdong Han12,*
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Author Affiliations
1State Key Laboratory of Integrated Optoelectronics College, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, China2Key Laboratory of Icing and Anti/De-icing, China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, Chinashow less
Inspired by the nepenthes in nature, slippery liquid-infused porous substrates (SLIPS) have attracted extensive research attentions. In this work, a graphene @ polyvinylidene fluoride (G@PVDF) composite substrate was ablated by a laser technology. Then paraffin is uniformly filled in the grooves by a thermal spin-coating method. A confocal laser scanning microscope and a scanning electron microscope were used to characterize the surface morphology and depth of the grooves. UV3600 and Infrared thermal imagers were used to test the absorption and photothermal characteristics of the samples. The droplet is "pinned" on the surface without light irradiation. Since graphene has excellent photothermal conversion capability, the photothermal conversion happens upon light irradiation. The temperature is high enough to melt the paraffin, the interface state changes from the friction gas-liquid-solid interface to a smooth gas-liquid-lubricant-solid interface. The droplet can slide at an inclination angle of about 10° without leaving any residues. In addition, the droplet sliding can be controlled by an external voltage. This work shows potentials in manipulating the behavior of droplets.
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