Reversible wettability between superhydrophobicity and superhydrophilicity of Ag surface

Lei, Sheng; Wang, Fajun; Wen, Li; Qiao, Guanjun

doi:10.1007/s40843-016-5040-3

Cited by 35 publications

(18 citation statements)

References 35 publications

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“…The periods of wettability transition in various substrates are different [31,32,33,34,35,36]. The reason for wettability transition has caught lots of attention [37,38,39,40,41,42]. Zhong et al stored aluminum samples textured by picosecond laser in different conditions such as air, CO 2 , O 2 , and N 2 atmospheres, and gas environments with the rich organic compound.…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic Surface Preparation and Wettability Transition of Titanium Alloy with Micro/Nano Hierarchical Texture

et al. 2018

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Microstructures are applied to various hydrophobic/hydrophilic surfaces due to the role of adjusting the surface wettability. In this paper, a 1064 nm pulsed picosecond laser was applied to prepare a micro/nano hierarchical structure on the surface of the titanium alloy (Ti-6Al-4V). The microstructures consist of dimple arrays with various diameters, depths, and areal densities. They are obtained by controlling the pulse energy and the number of pulses. The nanostructures are periodic ripples, which are defined as laser-induced periodic surface structure (LIPSS), and the dimensional parameter of LIPSS can be adjusted by changing the laser energy density and scanning speed. The contact angles of various laser textured surfaces were measured. It is found that the contact angle increases with the density of micro-textured surface increases, and the wetting state of textured surfaces conforms to the Cassie model. Some laser processed samples were subjected to low-temperature annealing treatment. It is observed that the low-temperature annealing process can accelerate the surface wettability transition significantly, which is attributed to the change of the hydroxyl groups on the surface. Finally, a superhydrophobic surface with the maximum contact angle of 144.58° is obtained.

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Section: Introductionmentioning

confidence: 99%

“…Lei et al prepared a superhydrophobic silver surface on brass by electrodeposition. At first, the surface was subjected to heat treatment at 200 °C and then the contact angle test was conducted after cooling, and the surface was superhydrophobic immediately [39]. Qing et al prepared the TiO 2 /PVDF superhydrophobic hierarchical surface.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Surface Preparation and Wettability Transition of Titanium Alloy with Micro/Nano Hierarchical Texture

et al. 2018

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“…Comparison with the WCA of the original copper mesh 120°, the Cu-Ag surface with the deposition of silver micro-nano structures form on the surface and the chemical composition of the surface change has changed. According to the Wenzel model with the increasing of the microstructure on the surface of a hydrophilic material while increases 24,25 the hydrophilicity of the material. Due to the superhydrophilicity and underwater oleophobicity of the Cu-Ag (pre-wetted by water), water permeated through it while pump oil was blocked, and no pump oil was visible in the separated water ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Facile Construction of Copper Mesh Surface from Superhydrophilic to Superhydrophobic for Various Oil-Water Separations

Zhang¹,

Pan²,

Zhao³

et al. 2019

Eng. Sci.

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Specially wettability materials offer a new pathway for effective oil-water separation. However, these materials with desired wettability, simple process and low cost as well as high efficiency separation are still urgently needed. Herein, facile strategies, acid etching and PDMS coating, were reported for the construction of copper mesh surfaces with special wettability from superhydrophilic to superhydrophobic. In the first acid etching, copper mesh surface exhibits a superhydrophilic and underwater superoleophobic properties, and the etched copper mesh with high separation efficiencies (92%) was obtained. After PDMS coating, a low adhesion superoleophilic and superhydrophobic copper mesh shows high -2-1 water contact angle of 153°, high flux (~31000 L*m *h ), excellent anti-icing and self-cleaning performances. Additionally, after UVB, mechanical wear, hot water and acid/alkaline solution treating, the coated mesh still showed excellent water-repellency performance. Moreover, the coated mesh by connecting with a vacuum pump was used for continuous oil-water separation. This work provides not only a simple and efficient method to fabricate controllable wettability copper mesh with oil-recovery ability but also a new opportunity for potential applications in continuous oil-water separation.

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“…Herein, we reported a down-shifting fluorescence detection method based on NaYF4:Eu 3+ @Ag core-shell nanocrystals for rapid detection of glucose, which is relied on the RE fluorescence release effect. After immobilization of glucose oxidase (GOx) on the surface of NaYF4:Eu 3+ @Ag core-shell nanocrystals, the fluorescence of NaYF4:Eu 3+ can be recovered by the addition of glucose, which can oxidize the Ag shells to Ag + ions due to the enzymatic conversion of glucose by GOx to generate H2O2 [30][31][32][33]. The limit of detection of NaYF4:Eu 3+ @Ag is 0.12 μmol L −1 .…”

Section: Introductionmentioning

confidence: 99%

Down-shifting luminescence of water soluble NaYF4:Eu3+@Ag core-shell nanocrystals for fluorescence turn-on detection of glucose

Wang

Liu

et al. 2016

Sci. China Mater.

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Techniques for detecting glucose are developing at a breathtaking speed because diabetes mellitus can cause many serious complications, such as blindness, high blood pressure heart disease and kidney failure. Herein, water soluble NaYF4:Eu 3+ @Ag core-shell nanocrystals for glucose detection with lower detection limit have been successfully developed, using NaYF4:Eu 3+ cores as the energy donors and Ag shells as the efficient quenchers through energy transfer. After immobilization of glucose oxidase (GOx) on the surface of NaYF4:Eu 3+ @Ag core-shell nanocrystals, the Ag shells can be decomposed in the presence of glucose, accompanied by down-shifting luminescence recovery. The limit of detection of NaYF4:Eu 3+ @Ag was 0.12 μmol L −1 . Therefore, the NaYF4:Eu 3+ @Ag can be easily extended to the detection of a variety of H2O2-involved analytes.

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Reversible wettability between superhydrophobicity and superhydrophilicity of Ag surface

Cited by 35 publications

References 35 publications

Superhydrophobic Surface Preparation and Wettability Transition of Titanium Alloy with Micro/Nano Hierarchical Texture

Superhydrophobic Surface Preparation and Wettability Transition of Titanium Alloy with Micro/Nano Hierarchical Texture

Facile Construction of Copper Mesh Surface from Superhydrophilic to Superhydrophobic for Various Oil-Water Separations

Down-shifting luminescence of water soluble NaYF4:Eu3+@Ag core-shell nanocrystals for fluorescence turn-on detection of glucose

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