A strategy of fast reversible wettability changes of WO3 surfaces between superhydrophilicity and superhydrophobicity

Gu, C.D.; Zhang, Jun; Tu, Jiangping

doi:10.1016/j.jcis.2010.08.064

Cited by 57 publications

(42 citation statements)

References 31 publications

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“…Some superhydrophobic surfaces have been achieved without using fluorinated substances [37]. The water contact angles of most such fluorine-free surfaces are around 150° [38][39][40], comparable with that obtained here.…”

Section: Resultssupporting

confidence: 81%

Superhydrophobic adhesive surface on titanate nanotube brushes through surface modification by capric acid

Okada

Tokudome

Takahashi

2016

J Sol-Gel Sci Technol

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A superhydrophobic adhesive surface is applied to titanate nanotube (TNT) brushes through surface modification using capric acid. Hydroxyl groups on the TNT brushes are reacted with carboxylic acids via esterification using a chemical vapor deposition method at 110°C. The alignment of the titanate nanostructures and the surface modification with capric acid resulted in a hydrophobic surface. The hydrophobicity increases with surface modification time; the contact angle, h CA , increases from 0°to 152°. After 4 h modification, the surface shows superhydrophobicity with water adhesion ability. The use of carboxylic acids as modifiers offers advantages that include low cost, environmental compatibility, and non-toxicity and is capable of adapting TNT-based functional interfaces toward a variety of applications. Graphical Abstract

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Section: Resultssupporting

confidence: 81%

Superhydrophobic adhesive surface on titanate nanotube brushes through surface modification by capric acid

Okada

Tokudome

Takahashi

2016

J Sol-Gel Sci Technol

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“…A reversible switch between superhydrophilicity and superhydrophobicity was tuned by controlling the adsorption/ desorption process of n-dodecanethiol associated with the lightinduced silver nanoparticles on WO 3 nanostructured film. 364 …”

Section: Superhydrophilic Surfacesmentioning

confidence: 99%

Bioinspired Surfaces with Superwettability: New Insight on Theory, Design, and Applications

Wang¹,

et al. 2015

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Figure 6. Typical biological materials with superwettability and corresponding multiscale structures. (a) Lotus leaves demonstrate low adhesive, superhydrophobic, and self-cleaning properties, due to randomly distributed micropapillae covered by branch-like nanostructures. (b) Rice leaf surfaces possess anisotropic superhydrophobicity arising from the arrangement of lotus-like micropapillae in one-dimensional order. (a and b) Reproduced with permission from ref 7. Copyright 2002 Wiley. (c) Butterfly wings exhibit directional adhesion, superhydrophobicity, structural color, self-cleaning, chemical sensing capability, and fluorescence emission functions due to the multiscale structures. Reproduced with permission from ref 45. Copyright 2007 American Chemical Society. (d) Water strider legs have robust and durable superhydrophobicity arising from directional arrangements of needlelike microsetae with helical nanogrooves. Reproduced with permission from ref 46. Copyright 2004 Nature Publishing Group. (e) Mosquito compound eyes demonstrate superhydrophobic, antifogging, and antireflection functions due to HCP microommatidia covered by HNCP nanonipples. Reproduced with permission from ref 47. Copyright 2007 Wiley. (f) Poplar leaves possess superhydrophobic and antireflection properties originating from dense hairs with the hollow fibrous structure. Reproduced with permission from ref 48. Copyright 2011 The Royal Society of Chemistry. (g) Gecko feet present superhydrophobic, reversible adhesive, and self-cleaning functions due to the aligned microsetae splitting into hundreds of nanospatulae. Reproduced with permission from ref 49. Copyright 2012 The Royal Society of Chemistry. (h) Red rose petals exhibit superhydrophobicity with high adhesion and structural color arising from periodic arrays of micropapillae covered by nanofolds. Reproduced with permission from ref 31. Copyright 2008 American Chemical Society. (i) Salvinia leaves demonstrate the superhydrophobic and air-retention properties due to the Salvinia Effect. Reproduced with permission from ref 50. Copyright 2010 Wiley. (j) Fish scales present drag reduction, superoleophilicity in air, and superoleophobicity in water due to oriented micropapillae covered by nanostructures. Reproduced with permission from ref 33. Copyright 2009 Wiley. (k) Clam shell shows low adhesive superoleophobicity underwater arising from the surface multiscale structures and special chemical composition. Reproduced with permission from ref 51. Copyright 2012 Wiley. (l) Peanut leaves exhibit high adhesive superhydrophobicity and fog capture properties originating from the special surface multiscale structures and chemical composition. Reproduced with permission from ref 52.

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“…7,8 WO 3 films also possess hydrophilic, 9 gasochromic 10 and photochromic properties. 11 Tungsten trioxide is one of the most widely studied electrochromic materials used as films.…”

Section: Introductionmentioning

confidence: 99%

Structural and mechanical properties of nanostructured tungsten oxide thin films

Hasan

Haseeb

Masjuki

2012

Surface Engineering

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This study presents structural and mechanical properties of WO 3 thin films deposited on glass substrates at different temperatures by radio frequency reactive magnetron sputtering. WO 3 films deposited at temperatures up to 200uC are found as amorphous, but crystalline at 300 and 400uC. Chemical analysis reveals the overstoichiometry of the films. The diffusion of sodium ions from glass substrates occurs at higher temperatures. The adhesion critical loads of WO 3 films deposited at room temperature and at 200, 300 and 400uC are found to be 670, 990, 1080 and 830 mN respectively using microscratch tests with a 25 mm probe. Scratch hardness increases with the rise of temperature. The depth of penetration and wear track width decrease with temperature, indicating an improved penetration and wear resistance at temperatures up to 300uC. Scanning electron microscopy images reveal that the coatings fail due to wedge and recovery spallation during scratch and wear tests respectively.

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A strategy of fast reversible wettability changes of WO3 surfaces between superhydrophilicity and superhydrophobicity

Cited by 57 publications

References 31 publications

Superhydrophobic adhesive surface on titanate nanotube brushes through surface modification by capric acid

Superhydrophobic adhesive surface on titanate nanotube brushes through surface modification by capric acid

Bioinspired Surfaces with Superwettability: New Insight on Theory, Design, and Applications

Structural and mechanical properties of nanostructured tungsten oxide thin films

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