Temperature-Responsive, Femtosecond Laser-Ablated Ceramic Surfaces with Switchable Wettability for On-Demand Droplet Transfer

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(10), P. 13740 - 13752

Published: March 1, 2023

Reversible wettability transition has drawn substantial interest because of its importance for widespread applications, but facile realization such on ceramic surfaces, which is promising achieving on-demand droplet manipulation under harsh conditions, remains rare. Herein, superhydrophobic zirconia surfaces that can reversibly and repeatedly transit between superhydrophobicity superhydrophilicity after alternate heating treatments have been fabricated using a femtosecond laser. The underlying mechanisms the complex transitions laser-ablated are elucidated. Hydrophilic polished immediately become superhydrophilic laser ablation, mainly attributed to amplification effect laser-induced micro/nanostructures no obvious relationship with oxygen vacancies. obtained transformed into rapid adsorption airborne organic compounds driven by physical interaction conditions. With removal re-adsorption compounds, reversible repeatable happens surfaces. also contribute transitions. Furthermore, utilizing switchable wettability, transfer strong acid in air oil solution achieved. This work will inspire environmentally friendly fabrication their multifunctional applications

Language: Английский

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Biomimetic nano/microfabrication techniques in multi‐bioinspired superhydrophobic wood: New insight on theory, design and applications

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 48, P. 104217 - 104217

Published: March 17, 2024

Language: Английский

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Monolithically integrated micro-supercapacitors with high areal number density produced by surface adhesive-directed electrolyte assembly

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 2, 2024

Accurately placing very small amounts of electrolyte on tiny micro-supercapacitors (MSCs) arrays in close proximity is a major challenge. This difficulty hinders the development densely-compact monolithically integrated MSCs (MIMSCs). To overcome this grand challenge, we demonstrate controllable directed assembly strategy for precise isolation densely-packed at micron scale, achieving scalable production MIMSCs with ultrahigh areal number density and output voltage. We fabricate patterned adhesive surface across MIMSCs, that induce 10,000 highly MSC regions, 100 µm-scale spatial separation between each droplet within seconds. The resultant achieve an 210 cells cm

Language: Английский

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Magnetic-Actuated Jumping of Droplets on Superhydrophobic Grooved Surfaces: A Versatile Strategy for Three-Dimensional Droplet Transportation

ACS Nano, Journal Year: 2024, Volume and Issue: 18(8), P. 6359 - 6372

Published: Feb. 16, 2024

On-demand droplet transportation is of great significance for numerous applications. Although various strategies have been developed transportation, out-of-surface three-dimensional (3D) droplets remains challenging. Here, a versatile strategy based on magnetic-actuated jumping (MAJ) superhydrophobic grooved surfaces (SHGSs) presented, which enables 3D, remote, and precise manipulation even in enclosed narrow spaces. To trigger MAJ, an electromagnetic field utilized to deform the SHGS with aid attached magnetic particle, thereby acquires excess surface energy. When quickly removed, energy partly converted into kinetic energy, allowing jump atop surface. Through high-speed imaging numerical simulation, working mechanism size matching effect MAJ are unveiled. It found that behavior can only be observed if sizes grooves matched, otherwise unwanted entrapment or pinch-off effects would lead failure MAJ. A regime diagram serves as guideline design SHGSs proposed. The capacities including in-surface directional climbing stairs, crossing obstacles, also demonstrated. With ability remotely manipulate spaces without using any mechanical moving parts, used miniaturized fluidic platforms, exhibit potential applications bioassays, microfluidics, droplet-based switches, microreactions.

Language: Английский

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Construction of robust superhydrophobic surfaces with an 'armour' structure on the low-temperature steels by picosecond laser processing

Tribology International, Journal Year: 2024, Volume and Issue: 195, P. 109637 - 109637

Published: April 3, 2024

Language: Английский

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A UV‐Resistant Heterogeneous Wettability‐Patterned Surface

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(42)

Published: July 14, 2023

Preparing UV-resistant heterogeneous wettability patterns is critical for the practical application of surfaces with wettability. However, combining superhydrophobic and superhydrophilic materials on challenging. Inspired by structure cell membranes, a wettability-patterned surface (UPS) designed via laser ablation coating multilayer structures. silica can be created in situ covered TiO2 nanoparticles. The UV resistance time UPS -based more than two orders magnitude higher that obtained other molecular modification methods require mask. cell-membrane-like regulates migration internal siloxane chain segments hydrophilic hydrophobic regions surface. enables efficient patterning functional under irradiation, controlling wetting behavior liquids open-air systems. Furthermore, its remains stable even after 50 h intense irradiation (365 nm, 500 mW cm-2 ). These patterned will likely applied microfluidics, culture, energy conversion, water collection future.

Language: Английский

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Fabrication of robust superhydrophobic copper surface via highly efficient nanosecond laser-based surface functionalization

Optik, Journal Year: 2023, Volume and Issue: 276, P. 170690 - 170690

Published: Feb. 15, 2023

Language: Английский

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Multistage Gradient Bioinspired Riblets for Synergistic Drag Reduction and Efficient Antifouling

ACS Omega, Journal Year: 2023, Volume and Issue: 8(9), P. 8569 - 8581

Published: Feb. 20, 2023

Shark skin-inspired riblets have represented the tremendous potential for drag reduction (DR) and antifouling in submarine, ship, so on. Most studies simplified complex denticle embedded shark skin into single-stage riblet with uniform parameters, ignoring influence of height gradient material deformation on DR antifouling. In present study, flexible multistage (MSGRs) varied heights were proposed, their effects investigated by experiment numerical simulation. The experimental results showed that maximum rate MSGRs an elastic modulus 4.592 MPa could reach 16.8% at a flow velocity 0.5 m/s. Moreover, dynamic adhesion measurement indicated 69.6% area Chlorella vulgaris MSGR surface. identified low surface energy generate steady high- low-velocity streaks alter state fluid, thus lessening average near wall adhering selectivity pollutants achieving synergistic efficient Taken together, proposed holds promise reducing friction inhibiting particle attachment engineering applications.

Language: Английский

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Robust superhydrophobic copper oxide layer with high-low staggered structure on polymers for strong anti-icing and all-day de-icing

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156332 - 156332

Published: Sept. 1, 2024

Language: Английский

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Wettability Controlled Surface for Energy Conversion

Small, Journal Year: 2022, Volume and Issue: 18(31)

Published: July 6, 2022

To achieve clean and high-efficiency utilization of renewable energy, functional surfaces with controllable patternable wettability are becoming a fast-growing research focus. In this work, laser scribing strategy to fabricate patterned graphene that capable energy conversion in different forms is demonstrated. Using the raster-scanning vector-scanning modes, two distinct surface structures constructed on polybenzoxazine substrate, yielding superhydrophilic (LSHL) superhydrophobic (LSHB) surface, respectively. Of particular note unique hierarchical structure LSHB has endowed it quite robust superwetting behaviors. Further profiting from flexibility processing method, patterns spatially resolved LSHL regions designed, achieving liquid kinetic energy. This also offers tractable approach wettability-engineered devices enable directional, pumpless transport water by capillary pressure gradient selective cooling via jet impingement. addition, demonstrates high electric-to-thermal (222 °C cm2 W-1 ) light-to-thermal (88%). Overall, material system method present promising step forward developing easy-fabricated controlled for efficient conversion.

Language: Английский

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