Journal article
Large-area surface wettability patterning of metal alloys via a maskless laser-assisted functionalization method
Applied surface science, Vol.568, p.150788
12/01/2021
DOI: 10.1016/j.apsusc.2021.150788
Abstract
[Display omitted]
•We present an innovative high-throughput processing method of wettability patterning ranging from superhydrophobicity to superhydrophilicity for large-area metal alloy surfaces.•Surface wettability patterning is achieved by selectively processing the surface with designated micro-/nanoscale topological structures and varying surface energy chemical groups using hybrid procedures combining laser and chemical immersion treatments.•Patterning an extreme wettability surface is decoupled from patterning surface topography; a wide range of surface topography from low-roughness, isotropic, random nano-structured texture to highly structured texture can be accurately achieved by adjusting laser parameters.•Anti-reflection surface properties, ranging from moderately reduced reflectivity to ultralow reflectivity of less than 5% can be achieved for a patterned surface.
An innovative laser-assisted functionalization (LAF) method is presented in this work to fabricate a superhydrophobic-superhydrophilic patterned surface on a large-area metal alloy with a high process throughput. The LAF method comprises four steps, including two laser processing steps and two surface chemistry modification steps. Two strategies are demonstrated to fabricate extreme wettability patterns on aluminum alloy without using protective masking. Strategy I fabricates contrasting topography and chemistry where superhydrophobic regions are nanostructured with fluorocarbon chemistry, and superhydrophilic regions contain microchannels with nitrile chemistry. Conversely, strategy II fabricates similar microchannel topography for both wettability regions with contrasting chemistry. Surface topography patterning, from low-roughness, isotropic, random nanostructured texture to highly structured texture, is achieved by adjusting the laser parameters during LAF. LAF constitutes the first known laser-based surface engineering method that decouples extreme wettability from surface topography. In addition, anti-reflection surface property, ranging from moderately reduced reflectivity of about 50% to ultralow reflectivity of less than 10%, is achieved using this process. The processing mechanism, surface chemistry, and surface topography are analyzed to demonstrate the simplicity, robustness, and feasibility of the process.
Details
- Title: Subtitle
- Large-area surface wettability patterning of metal alloys via a maskless laser-assisted functionalization method
- Creators
- Avik Samanta - University of IowaWuji Huang - University of IowaMartell Bell - University of IowaScott K Shaw - University of IowaNicholas Charipar - United States Naval Research LaboratoryHongtao Ding - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Applied surface science, Vol.568, p.150788
- Publisher
- Elsevier B.V
- DOI
- 10.1016/j.apsusc.2021.150788
- ISSN
- 0169-4332
- eISSN
- 1873-5584
- Grant note
- DOI: 10.13039/100000001, name: National Science Foundation, award: CMMI-1762353; DOI: 10.13039/100003187, name: NSF
- Language
- English
- Date published
- 12/01/2021
- Academic Unit
- Chemistry; Mechanical Engineering; Iowa Technology Institute
- Record Identifier
- 9984196635902771
Metrics
8 Record Views