A5009794335- Surface Modification and Superhydrophobicity
- Adhesion, Friction, and Surface Interactions
- Fluid Dynamics and Heat Transfer
- Additive Manufacturing and 3D Printing Technologies
- Tribology and Lubrication Engineering
- Diamond and Carbon-based Materials Research
- Additive Manufacturing Materials and Processes
- Surface Roughness and Optical Measurements
- Electrocatalysts for Energy Conversion
- Lubricants and Their Additives
- Icing and De-icing Technologies
- Graphene research and applications
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Composting and Vermicomposting Techniques
- Municipal Solid Waste Management
- Carbon and Quantum Dots Applications
- Laser-induced spectroscopy and plasma
- Synthesis and properties of polymers
- Flame retardant materials and properties
- Electrochemical Analysis and Applications
- Metallurgy and Material Forming
- CO2 Reduction Techniques and Catalysts
- Particle Dynamics in Fluid Flows
- Tribology and Wear Analysis
University of Iowa
1937-2024
Zhejiang University
2022
Iowa State University
2022
Iowa City Public Library
2021
Wuhan University of Technology
2020
Extreme wetting activities of laser-textured metal alloys have received significant interest due to their superior performance in a wide range commercial applications and fundamental research studies. Fundamentally, extreme wettability structured depends on both the surface structure chemistry. However, compared with generation physical topology surface, role chemistry is less explored for laser texturing processes tune wettability. This work introduces systematic design approach modify...
Enabling capillary wicking on bulk metal alloys is challenging due to processing complexity at different size scales. This work presents a laser-chemical surface treatment fabricate superwicking patterns guided by superhydrophobic region over large-area alloy surface. The generates micro/nanostructures and desirable chemistry simultaneously. was first fabricated the whole laser under water confinement fluorosilane treatment; subsequently, stripes were processed second in air cyanosilane...
Direct tuning of silver electrode wetting state affects its activity and selectivity for oxygen reduction reaction.
In this study, we investigated the effects of laser shock peening (LSP) on corrosion resistance lightweight metal alloys, specifically AA6061 and AZ31. LSP was performed underwater, using a nanosecond pulse without protective coating or layer workpiece. The behaviors these alloys were analyzed through electrochemical tests, including open circuit potential, impedance spectroscopy, potentiodynamic polarization measurements. results demonstrated that significantly improved resistance, higher...
Electrochemical reduction of CO2 and H2O to synthesize gas (H2 CO mixture) is significant interest due established industrial pathways tune the H2 composition generate an array valuable products including methanol, synthetic fuel, natural gas, hydrogen. However, controlled H2:CO ratios are challenging on CO-active electrocatalysts like silver. We demonstrate that applying laser engineering adjust surface wetting state a silver electrocatalyst with water contact angles θw ranging from 47°...
Machine learning interatomic potentials (MLIPs) have substantially advanced atomistic simulations in materials science and chemistry by providing a compelling balance between accuracy computational efficiency. While leading MLIPs rely on representations of atomic environments using spherical tensors, Cartesian offer potential advantages simplicity In this work, we introduce Atomic Moment Potentials (CAMP), an approach equivalent to models based tensors but operating entirely the space. CAMP...
Abstract Layered nanocomposite hydrotalcite/montmorillonite (LDH/MMT) was obtained though in-situ synthesis of nickel-magnesium-aluminum hydrotalcite (Ni-Mg-Al LDH) on the surface montmorillonite nanosheets (MMTNS) by one-step hydrothermal method. X-ray diffractometer (XRD), Fourier Transform Infrared Spectrometer (FTIR), Scanning Electron Microscope (SEM), Transmission (TEM) were used to characterize composite material. The flame retardancy property investigated thermogravimetry (TG) and...
Additive manufacturing (AM) has revolutionized the production of complex geometries with superior properties compared traditional methods. However, high roughness and poor wettability as-produced surfaces AM parts limit their suitability for certain applications. To address this, we present a maskless laser-assisted surface functionalization method to improve metal 3D printed parts. This study explores potential combining patterning, promising technique in fluid-related fields. Large-area...
Surface modification has been extensively applied to metal alloys achieve extraordinary surface wettability for a wide range of applications. However, only limited research done on the 3D-printed parts. In this study, AlSi10Mg and Ti6Al4V parts fabricated using selective laser melting (SLM) were functionalized with silane reagent. With assist texturing or not, showed different wetting behaviors, as surfaces treated by chemical solutions higher water adhesion (rose petal effect), while gone...
In this study, the effect of surface wettability on tribological performance is evaluated through a ball-on-flat reciprocating wear test. The substrate material, M2 tool steel, laser processed and then functionalized with fluorocarbon nitrile chemistry to achieve distinct oleophobicity oleophilicity, respectively, but similar nanoscale texture. poly-alpha-olefin (PAO) base oil used as baseline lubricant, ammonium- phosphonium-based oil-miscible ionic liquids (ILs) are additives. interaction...
Air bubble injection has been a widely studied method for reducing frictional drag in fluid flows, especially the marine industry. However, lack of control over air stability, size, and shape hindered its widespread adoption. This study investigates use laser-based surface wettability modification techniques to address these challenges by enhancing behavior water flows. We processed metal plates using nanosecond laser chemical immersion create patterns consisting regions either...
View Video Presentation: https://doi.org/10.2514/6.2022-4095.vid An experimental study was conducted to compare the water droplet dynamic impingement and wind driven runback process on laser treated surfaces with different wettability characteristics. Two were tested: one that showed what can be described as lotus leaf effect other rose petal effect. The is when a super hydrophobic surface (contact angle ~150) has small hysteresis (<30) while ~140) large (>100). done using vertical tunnel....