Rose petal wetting behavior realized by ultrathin laser-induced graphene

IF 5.8 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2025-07-28 DOI:10.1007/s42823-025-00940-4

Hee Ra Lee, Hong Gun Kim, Tae-Wook Kim, Sukang Bae, Jong-Seong Bae, Ji-won Park, Seoung-Ki Lee

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Abstract

Laser-induced graphene (LIG) has emerged as a promising carbon nanomaterial platform owing to its scalability and tunable surface properties. Although its electrical and structural characteristics have been widely explored, the precise modulation of the surface energy remains challenging, particularly in ultrathin configurations. In this study, we investigated the wetting behavior of an ultrathin LIG synthesized from a fluorinated polyimide (F-PI) thin-film precursor using ultraviolet (UV) laser irradiation. Systematic variations in laser exposure induced morphologic transitions from hierarchical porous networks to compact planar structures, accompanied by changes in the chemical composition, including fluorine depletion and oxygen incorporation. These combined effects result in a broad range of wetting behaviors, including superhydrophobicity and hydrophilicity. Remarkably, LIG produced under single irradiation exhibited a rose-petal-like wetting state characterized by a high contact angle and strong droplet adhesion, a phenomenon not previously reported in LIG systems. This work elucidates the interplay between laser-induced nanostructuring and surface chemistry in governing wetting behavior and establishes a controllable strategy for fabricating functional carbon surfaces for applications in microfluidics, selective adhesion, and water-repellent coating technologies.

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超薄激光诱导石墨烯实现玫瑰花瓣润湿行为

激光诱导石墨烯（LIG）由于其可扩展性和可调的表面特性而成为一种很有前途的碳纳米材料平台。尽管其电学和结构特性已被广泛探索，但表面能的精确调制仍然具有挑战性，特别是在超薄结构中。在这项研究中，我们研究了用紫外（UV）激光照射由氟化聚酰亚胺（F-PI）薄膜前驱体合成的超薄LIG的润湿行为。激光照射的系统变化诱导了从分层多孔网络到紧凑平面结构的形态转变，伴随着化学成分的变化，包括氟消耗和氧掺入。这些综合作用导致了广泛的润湿行为，包括超疏水性和亲水性。值得注意的是，在单次照射下产生的LIG表现出玫瑰花瓣般的湿润状态，具有高接触角和强液滴粘附性，这是以前在LIG系统中未报道的现象。这项工作阐明了激光诱导的纳米结构和表面化学在控制润湿行为方面的相互作用，并建立了一种可控制的策略，用于制造用于微流体、选择性粘附和防水涂层技术的功能碳表面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.