Related Experiment Video
Updated: May 15, 2025
Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
Published on: November 9, 2015
Reversible and Programmable Wettability of Laser-Induced Graphene Papers via In Situ Joule Heating-Triggered
Yanan Wang1, Pingping Hao2, Sida Luo2
1Aviation Key Lab of Science and Technology on High Performance Electromagnetic Windows, AVIC Research Institute for Special Structures of Aeronautical Composite, Jinan 250023, China.
Abstract:
Reversible surface materials with programmable wettability play an increasingly vital role in a wide variety of fields from science to industry. Based on laser-induced graphene (LIG) technology, we innovatively propose a paraffin-infused porous LIG paper (P-LIGP) with tunable superslippery wettability. On account of graphene's excellent electrical property, paraffin in P-LIGP can transit rapidly from a solid-to-liquid state in response to the in situ Joule heating effect. Thus, a LIGP surface is created with a dynamic and reversible transition between slippery and nonslippery state. In addition, combining the patternable performance with tunable LIGP resistance, the paraffin layer from P-LIGP can be selectively melted based on Ohm's law and Kirchhoff's laws, thus enabling special flow pathways with programmable wettability for manipulating the droplets with various straight/oblique/arc/S-shaped sliding patterns. These applications with customizable LIG resistance performance promise the in situ Joule heating of P-LIGP for designing intelligent and flexible temperature-responsive surfaces.
