Important Role of Nanopore Morphology in Superoleophobic Hierarchical Surfaces

Fujii, Takashi; Sato, Hayaho; Tsuji, Etsushi; Aoki, Yoshitaka; Habazaki, H.

doi:10.1021/jp305078t

Cited by 27 publications

(35 citation statements)

References 35 publications

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“…The high versatility of this technique in obtaining different nanostructures (metals, organic compounds, oxides, hybrids and other complex heterostructures) is an additional feature that supports its use for wetting applications. Important achievements have been made in the last few years through the OAD fabrication of surfaces possessing singular adhesive properties [555], hydrophobicity [556][557][558][559], superhydrophobicity [186][187][188]557,[560][561][562][563], superhydrophilicity [366] or superolephobicity [564,565]. Initial approaches to the development of highly hydrophobic surfaces by OAD combined the surface nanostructuration capability of this technique with the chemical modification of the surface composition by different methods.…”

Section: Surface-controlled Wettabilitymentioning

confidence: 99%

“…Other pre-patterned metal OAD nanorods have been combined with Teflon deposition to control the roughness, morphology and chemistry of the surface, thereby rendering it superhydrophobic [558]. Habazaki et al [564,565] have expanded this hierarchical roughness concept by using aluminum sputtered OAD nanorods as a starting material, followed by their anodization and surface decoration with fluorinated alkyl phosphate. These surfaces showed an interesting omniphobic behavior characterized by a high repellency of water, oils and hexadecane.…”

Section: Surface-controlled Wettabilitymentioning

confidence: 99%

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Perspectives on oblique angle deposition of thin films: From fundamentals to devices

Barranco

Borrás

González‐Elipe

et al. 2016

Progress in Materials Science

618

436

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a b s t r a c tThe oblique angle configuration has emerged as an invaluable tool for the deposition of nanostructured thin films. This review develops an up to date description of its principles, including the atomistic mechanisms governing film growth and nanostructuration possibilities, as well as a comprehensive description of the applications benefiting from its incorporation in actual devices. In contrast with other reviews on the subject, the electron beam assisted evaporation technique is analyzed along with other methods operating at oblique angles, including, among others, magnetron sputtering and pulsed laser or ion beam-assisted deposition techniques. To account for the existing differences between deposition in vacuum or in the presence of a plasma, mechanistic simulations are critically revised, discussing well-established paradigms such as the tangent or cosine rules, and proposing new models that explain the growth of tilted porous nanostructures. In the second part, we present an extensive description of applications wherein oblique-angle-deposited thin films are of relevance. From there, we proceed by considering the requirements of a large number of functional devices in which these films are currently being utilized (e.g., solar cells, Li batteries, electrochromic glasses, biomaterials, sensors, etc.), and subsequently describe how and why these nanostructured materials meet with these needs.

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Section: Surface-controlled Wettabilitymentioning

confidence: 99%

Section: Surface-controlled Wettabilitymentioning

confidence: 99%

Perspectives on oblique angle deposition of thin films: From fundamentals to devices

Barranco

Borrás

González‐Elipe

et al. 2016

Progress in Materials Science

618

436

View full text Add to dashboard Cite

show abstract

“…For instance, Fujii et al 48 prepared hierarchical submicrometer-nanometer dual pillar surfaces with optimized pillar intervals via sputtering AlNb alloys onto aluminium substrates, followed by further anodizing. In a subsequent work, 49 the authors replaced the Al-…”

Section: Sputter Depositionmentioning

confidence: 99%

Superamphiphobic surfaces

2014

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Superamphiphobicity is an effect where surface roughness and surface chemistry combine to generate surfaces which are both superhydrophobic and superoleophobic, i.e., contact angles (yCA) greater than 1501 along with low contact angle hysteresis (CAH) not only towards probing water but also for low-surface-tension 'oils'. In this review, we summarize the research on superamphiphobic surfaces, including the characterization of superamphiphobicity, different techniques towards the fabrication of surface roughness and surface modification with low-surface-energy materials as well as their functional applications. Superamphiphobicity is an effect where surface roughness and surface chemistry combine to generate 5 surfaces which are both superhydrophobic and superoleophobic, i.e., contact angles ( CA ) greater than 150° along with low contact angle hysteresis (CAH) not only towards probing water but also for lowsurface-tension 'oils'. In this tutorial review, we summarize the research on superamphiphobic surfaces, including the characterization of superamphiphobicity, different techniques towards the fabrication of surface roughness and surface modification with low-surface-energy materials as well as their functional 10 applications.

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“…16,17 Some of the present authors also reported that dual-pillar or submicrometerpillar/nanopore hierarchical surfaces with controlled geometries could be utilized for superoleophobicity. 18,19 However, most studies have still found superoleophobicity limited to liquids with surface tensions not less than 27.5 mN m -1 (hexadecane). There are very few examples for high contact angle hysteresis > 150° and low contact angle hysteresis < 5° for liquids with surface tensions less than 25 mN m −1 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of superoleophobic hierarchical surfaces for low-surface-tension liquids

et al. 2014

Self Cite

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This study demonstrates the fabrication of hierarchical surfaces with super -repellency even for low-surface-tension liquids, including octane (surface tension of 21.7 mN m −1 ). Dual-pore surfaces were prepared by a combination of practical wet processes on an alumin ium substrate: chemical etching, anodizing, and organic monolayer coating. Th e size of the larger pores formed by the chemical etching of aluminium is controlled by the concentration of HCl in the CuCl 2 /HCl etching solution. The etched aluminium is then anodized to introduce nanopores, followed by a pore-widening treatment that controls the nanopore size and porosity. The repellency for low-surface-tension liquids is enhanced by increasing the size of the larger pores as well as the porosity of the walls of the larger pores in this dual-pore morphology. Under optimized morphology with a fluoroalkyl-phosphate monolayer coating, an advancing contact angle close to 160º, a contact angle hysteresis of less than 5º and a sliding angle of 10º is achieved even for octane.

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Important Role of Nanopore Morphology in Superoleophobic Hierarchical Surfaces

Cited by 27 publications

References 35 publications

Perspectives on oblique angle deposition of thin films: From fundamentals to devices

Perspectives on oblique angle deposition of thin films: From fundamentals to devices

Superamphiphobic surfaces

Fabrication of superoleophobic hierarchical surfaces for low-surface-tension liquids

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