Superhydrophobic surfaces fabricated by nanoimprint lithography

Pozzato, Alessandro; Zilio, Simone Dal; Fois, Giovanni; Vendramin, Diego; Mistura, Giampaolo; Belotti, M.; Chen, Yong; Natali, M.

doi:10.1016/j.mee.2006.01.012

Cited by 214 publications

(114 citation statements)

References 3 publications

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“…In recently, superhydrophobic surfaces (with water contact angle larger than 150° and sliding angle (SA) is smaller than 10°) have shown great interest due to the potential application in selfcleaning materials [3], antifogging surfaces [4], antireflective surfaces [5], microfluid manipulation [6] and so on. Many novel methods for the fabrication of super hydrophobic surfaces have been developed such as anodic oxidation [7,8], chemical deposition [9], chemical etching [10][11][12][13][14][15], chemical vapor deposition [16][17][18][19], colloidal self-assembly [20][21][22], electrospinning [23,24], sol-gel [25,26] and some others [27,28].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Mechanically Stable Superhydrophobic Aluminium Surface with Excellent Self-Cleaning and Anti-Fogging Properties

Varshney

Mohapatra

Kumar

2017

Preprint

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Development of the self-cleaning and anti-fogging superhydrophobic coating for aluminum surfaces which is durable in the aggressive conditions has raised tremendous interest in materials science.In this work, by employing chemical etching technique with mixture of hydrochloric and nitric acid, followed by passivation with lauric acid, superhydrophobic aluminum surface was synthesized. The surface morphology analysis reveals the presence of rough microstructures on coated aluminium surface.Superhydrophobicity with water contact angle of 170 ± 3.9° and sliding angle of 4 ± 0.5° is achieved.Surface bounces off the high speed water jet, indicating excellent water-repellent nature of coating. It is also continuously floated on water surface for several weeks, showing excellent buoyancy nature.Additionally, coating maintains its superhydrophobicity after undergoing 100 cycles of adhesive tape peeling test. Its superhydrophobic nature withstands 90° and 180° bending, and repeated folding and defolding. Coating exhibits the excellent self-cleaning property. In low temperature condensation test, almost no accumulation of water drops on the surface, showing the excellent anti-fogging property of coating. This approach can be applied to any size and shape of aluminium surface and hence has great industrial applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Mechanically Stable Superhydrophobic Aluminium Surface with Excellent Self-Cleaning and Anti-Fogging Properties

Varshney

Mohapatra

Kumar

2017

Preprint

View full text Add to dashboard Cite

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“…There have been numerous attempts to develop a more precise R2R process [1][2][3][4][5][6] so as to take greater advantage of the unique structural colors [2,3] and dewetting properties [7] afforded by nanostructured surfaces.…”

Section: Introductionmentioning

confidence: 99%

Effects of UV Intensity, Line-speed, and Light Distribution on Conversion and Surface Elastic Modulus of Roll-to-roll UV-cured Film

Taki

Kondo

Ito

2016

J. Photopol. Sci. Technol.

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Roll-to-roll UV nanoimprint lithography (R2RUVNIL) is a promising technology for fabricating nanostructures on flexible films, but its application requires finding feasible operating conditions to peel-off the UV resin from the mold. Furthermore, to achieve the required nanostructure, conversion of the UV resin needs to be precisely optimized in terms of the UV intensity and line speed. In this study, (1,6-bis(acryloyloxy)hexane) resin was cured by roll-to-roll UV-curing while monitoring its conversion and surface elasticity by Fourier transform infrared spectroscopy and a nano indenter, respectively. It was found that the conversion increases by up to 85% with a decrease in line speed and increase in UV intensity. The effect of varying the distribution of UV light on the roller mold was also investigated, which revealed that a sharp distribution of UV light is effective in increasing the surface elastic modulus from 0.2 to 1.0 GPa at 0.6 conversion.

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“…The process is mostly one-stage, but is limited by a relatively small number of available materials. Another route consists of the preparation of the required surface texture in a material of choice, regardless of its SFE, and its subsequent hydrophobization with a thin layer of a low SFE compound [1,[6][7][8][9][10]. Various surface modification techniques can be utilized, either physicochemical processes (such as physical vapour deposition, plasma enhanced PVD), chemical vapour deposition or wet chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobization of epoxy nanocomposite surface with 1H,1H,2H,2H-perfluorooctyltrichlorosilane for superhydrophobic properties

et al. 2012

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Nature inspires the design of synthetic materials with superhydrophobic properties, which can be used for applications ranging from self-cleaning surfaces to microfluidic devices. Their water repellent properties are due to hierarchical (micrometer- and nanometre-scale) surface morphological structures, either made of hydrophobic substances or hydrophobized by appropriate surface treatment. In this work, the efficiency of two surface treatment procedures, with a hydrophobic fluoropolymer, synthesized and deposited from 1H,1H,2H,2H-perfluorooctyltrichlorosilane (PFOTS) is investigated. The procedures involved reactions from the gas and liquid phases of the PFOTS/hexane solutions. The hierarchical structure is created in an epoxy nanocomposite surface, by filling the resin with alumina nanoparticles and micron-sized glass beads and subsequent sandblasting with corundum microparticles. The chemical structure of the deposited fluoropolymer was examined using XPS spectroscopy. The topography of the modified surfaces was characterized using scanning electron microscopy (SEM), and atomic force microscopy (AFM). The hydrophobic properties of the modified surfaces were investigated by water contact and sliding angles measurements. The surfaces exhibited water contact angles of above 150° for both modification procedures, however only the gas phase modification provided the non-sticking behaviour of water droplets (sliding angle of 3°). The discrepancy is attributed to extra surface roughness provided by the latter procedure.

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Superhydrophobic surfaces fabricated by nanoimprint lithography

Cited by 214 publications

References 3 publications

Fabrication of Mechanically Stable Superhydrophobic Aluminium Surface with Excellent Self-Cleaning and Anti-Fogging Properties

Fabrication of Mechanically Stable Superhydrophobic Aluminium Surface with Excellent Self-Cleaning and Anti-Fogging Properties

Effects of UV Intensity, Line-speed, and Light Distribution on Conversion and Surface Elastic Modulus of Roll-to-roll UV-cured Film

Hydrophobization of epoxy nanocomposite surface with 1H,1H,2H,2H-perfluorooctyltrichlorosilane for superhydrophobic properties

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