A Review of Femtosecond‐Laser‐Induced Underwater Superoleophobic Surfaces

Yong, Jiale; Chen, Feng; Yang, Qing; Jiang, Zhuangde; Hou, Xun

doi:10.1002/admi.201701370

Cited by 101 publications

(105 citation statements)

References 251 publications

(522 reference statements)

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“…The micro/nanoscale hierarchical rough structures and the low‐surface‐energy chemical composition endow the F‐rough mesh with superhydrophobicity and ultralow water adhesion. A water droplet on such mesh is at the Cassie wetting state (Figure e) . The droplet only touches the peaks of the rough microstructures, resulting in an air cushion being trapped between the mesh surface and the water droplet.…”

Section: Resultsmentioning

confidence: 99%

Underwater Superaerophobic and Superaerophilic Nanoneedles‐Structured Meshes for Water/Bubbles Separation: Removing or Collecting Gas Bubbles in Water

Yong

Huo

et al. 2018

Global Challenges

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Water/bubbles separation has great practical significance, which can avoid the harm caused by underwater bubbles or cleverly collect useful gas bubbles in water. Here, a Cu(OH) 2 ‐nanoneedles‐structured rough copper mesh is fabricated by a one‐step chemical reaction. The original rough mesh shows superhydrophilicity in air and superaerophobicity in water. The underwater superaerophobic mesh has great anti/removing‐bubbles ability in water. In contrast, the rough mesh switches to superhydrophobicity in air and superaerophilicity in water after further being modified with fluoroalkylsilane. The underwater superaerophilic mesh can absorb bubbles and allow bubbles to pass through the mesh. Based on the superhydrophilic/superaerophobic mesh and the superhydrophobic/superaerophilic mesh, a strategy to remove gas bubbles from the water pipe is proposed, and an in‐water bubbles‐collection device is also designed. It is believed that these two kinds of mesh will have more applications in controlling the behavior of underwater bubbles.

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Section: Resultsmentioning

confidence: 99%

Underwater Superaerophobic and Superaerophilic Nanoneedles‐Structured Meshes for Water/Bubbles Separation: Removing or Collecting Gas Bubbles in Water

Yong

Huo

et al. 2018

Global Challenges

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“…The femtosecond laser beam (pulse width=67 fs, center wavelength=800 nm, repetition rate=1 kHz) was focused on the stainless steel surface by a plano‐convex lens (focal length=250 mm). The typical line‐by‐line laser scanning manner was used, which can be referred to our previous works . In this experiment, the laser power and the scanning speed were set constantly at 500 mW and 1 mm s −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Reducing Adhesion for Dispensing Tiny Water/Oil Droplets and Gas Bubbles by Femtosecond Laser‐Treated Needle Nozzles: Superhydrophobicity, Superoleophobicity, and Superaerophobicity

et al. 2018

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Three‐level microstructures were formed on the stainless‐steel surfaces by simple femtosecond laser ablation. The structured surfaces exhibit superhydrophilicity in air and superoleophobicity/superaerophobicity in water. After further stearic acid modification, the surfaces turned to superhydrophobicity and underwater superoleophilicity/superaerophilicity. Through this technique, the nozzle of a needle is transformed to possess superwettabilities. When the nozzles were used to release liquid and gas, the sizes of the dispensed water and oil droplets and air bubbles were dramatically reduced. Particularly, we demonstrate that the underwater superaerophobic nozzle could dispense air bubbles in nanoliter volume without the need of reducing the nozzle diameter. The liquid retention at the opening of the needle was also effectively prevented. Therefore, the reduced droplet/bubble size and retention allow us to achieve a dramatically enhanced volume accuracy and resolution during manipulation and transport of aqueous solutions and gases. The femtosecond laser‐induced superwetting nozzles can be used in high‐resolution liquid transport, inkjet printing, 3D printing, pipettes, medical devices, cell engineering, biological detection, microchemical reactor, and reducing industrial gas emission.

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“…The superhydrophobicity is ascribed to the combined effect of the hierarchical rough microstructure and the low-surface-energy modification. [21][22][23][24][25][26][27][28][29][30] Similar with the micro/nanoscale hierarchical structure of the superhydrophobic lotus leaf surface, both the microscale mesh structure and the nanowires contribute to the superhydrophobicity of the as-prepared mesh surface. [31][32][33][34][35] The water droplet on the mesh is at the Cassie wetting state, resulting in a high CA value and ultralow water adhesion.…”

Section: Methodsmentioning

confidence: 93%

Reversible switch between underwater superaerophilicity and superaerophobicity on the superhydrophobic nanowire-haired mesh for controlling underwater bubble wettability

et al. 2018

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Reversible switch between underwater superaerophilicity and superaerophobicity on the superhydrophobic nanowire-haired mesh for controlling underwater bubble wettability Controlling the underwater bubble wettability on a solid surface is of great research significance. In this letter, a simple method to achieve reversible switch between underwater superaerophilicity and underwater superaerophobicity on a superhydrophobic nanowire-haired mesh by alternately vacuumizing treatment in water and drying in air is reported. Such reversible switch endows the as-prepared mesh with many functional applications in controlling bubble's behavior on a solid substrate. The underwater superaerophilic mesh is able to absorb/capture bubbles in water, while the superaerophobic mesh has great anti-bubble ability. The reversible switch between underwater superaerophilicity and superaerophobicity can selectively allow bubbles to go through the resultant mesh; that is, bubbles can pass through the underwater superaerophilic mesh while are fully intercepted by the underwater superaerophobic mesh in a water medium. We believe these meshes will have important applications in removing or capturing underwater bubbles/gas. © 2018 Author (s)

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A Review of Femtosecond‐Laser‐Induced Underwater Superoleophobic Surfaces

Abstract: remarkable water repellence. [1,9,[13][14][15][16][17][18] Inspired by the superhydrophobicity of lotus leaf, thousands of artificial superhydrophobic surfaces have been fabricated, and those surfaces are wildly applied in self-

Cited by 101 publications

References 251 publications

Underwater Superaerophobic and Superaerophilic Nanoneedles‐Structured Meshes for Water/Bubbles Separation: Removing or Collecting Gas Bubbles in Water

Underwater Superaerophobic and Superaerophilic Nanoneedles‐Structured Meshes for Water/Bubbles Separation: Removing or Collecting Gas Bubbles in Water

Reducing Adhesion for Dispensing Tiny Water/Oil Droplets and Gas Bubbles by Femtosecond Laser‐Treated Needle Nozzles: Superhydrophobicity, Superoleophobicity, and Superaerophobicity

Reversible switch between underwater superaerophilicity and superaerophobicity on the superhydrophobic nanowire-haired mesh for controlling underwater bubble wettability

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