AI Article Synopsis
- Photothermal responsive slippery surfaces can revolutionize applications in biomedicine, self-cleaning, and more, but creating an effective version has been challenging.
- Researchers developed a new surface using laser-structured graphene and polyvinylidene difluoride (L-G@PVDF) that manipulates droplets with high light absorption and self-healing characteristics.
- The innovative surface also features anisotropic grooved structures, providing superior responsiveness to light, alongside impressive anti-frosting capabilities, and can be integrated into microfluidic systems for automated light-driven functions.
Article Abstract
Photothermal responsive slippery surfaces with switchable superwettability are promising in the fields of biomedicine, self-cleaning, anti-corrosion, and lab-on-a-chip systems. However, the development of a light switchable slippery surface that combines high-performance photothermal materials with hierarchical microstructures of special orientation remains challenging, which limits the applications in anisotropic droplet manipulation. Herein, we demonstrate a photothermal responsive slippery surface based on laser-structured graphene and polyvinylidene difluoride composites (L-G@PVDF) for controllable droplet manipulation. The L-G@PVDF film exhibits high light absorption (∼95.4%) in the visible and NIR region. After lubricating with paraffin, the resultant surface shows excellent self-healing ability and light-responsive wettability change due to the photothermal effect of L-G@PVDF and the hot melting effect of paraffin. Additionally, by introducing anisotropic grooved structures, the paraffin-infused L-G@PVDF surface displays anisotropic wettability that further affects droplet manipulation under light irradiation. Also, the photothermal responsive slippery property endows the paraffin-infused L-G@PVDF surface with excellent anti-frosting and de-icing capability. Moreover, the smart paraffin-infused L-G@PVDF surface can be combined with a microfluidics chip for light-driven automatic sampling. This study offers insight into the rational design of photothermal responsive slippery surfaces for controllable droplet manipulation.
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| http://dx.doi.org/10.1016/j.jcis.2022.08.153 | DOI Listing |
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