Fabrication of Tunable Superhydrophobic Surfaces by Nanosphere Lithography

Shiu, Jau-Ye; Kuo, Chung-Wen; Chen, Peilin; Mou, Chung‐Yuan

doi:10.1021/cm034696h

Cited by 548 publications

(418 citation statements)

References 29 publications

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“…Techniques such as reactive ion etching 220 or oxygen plasma treatment 23 can provide control over these parameters. The resulting topographies of the substrate surface, such as pillars and cones, support a specific wetting state.…”

Section: Factors Affecting Wetting Applicationsmentioning

confidence: 99%

“…Conversely, functionalization with a hydrophobic fluoroalkylsilane renders the surface superhydrophobic, where water wets the surface in a metastable Cassie-Baxter state at an angle greater than 150° ( Figure 13A,ii). 23 The concave structures produced by inverse opal assemblies provide ideal rough substrates to satisfy the Wenzel or Cassie-Baxter state of wetting. [222][223][224] Inverse opals have been used to template soft materials to create superhydrophobicity; 225 however, the concave structures shown in Figure 12A-B have not been used to create superoleophobic surfaces, which instead require a feature known as re-entrant geometry, shown in Figure 12C and discussed below.…”

Section: Factors Affecting Wetting Applicationsmentioning

confidence: 99%

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A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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Nature evolved a variety of hierarchical structures that produce sophisticated functions. Inspired by these natural materials, colloidal self-assembly provides a convenient way to produce structures from simple building blocks with a variety of complex functions beyond those found in nature. In particular, colloid-based porous materials (CBPM) can be made from a wide variety of materials. The internal structure of CBPM also has several key attributes, namely porosity on a sub-micrometer length scale, interconnectivity of these pores, and a controllable degree of order. The combination of structure and composition allow CBPM to attain properties important for modern applications such as photonic inks, colorimetric sensors, self-cleaning surfaces, water purification systems, or batteries. This review summarizes recent developments in the field of CBPM, including principles for their design, fabrication, and applications, with a particular focus on structural features and materials' properties that enable these applications. We begin with a short introduction to the wide variety of patterns that can be generated by colloidal self-assembly and templating processes. We then discuss different applications of such structures, focusing on optics, wetting, sensing, catalysis, and electrodes. Different fields of applications require different properties, yet the modularity of the assembly process of CBPM provides a high degree of tunability and tailorability in composition and structure. We examine the significance of properties such as structure, composition, and degree of order on the materials' functions and use, as well as trends in and future directions for the development of CBPM.

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Section: Factors Affecting Wetting Applicationsmentioning

confidence: 99%

Section: Factors Affecting Wetting Applicationsmentioning

confidence: 99%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8][9][10] In order to fabricate such surfaces, different materials and many methods have been introduced mainly by taking two factors, the surface energy and the surface roughness, into account. In the former trial, fluorinated compounds with low surface energy were usually used, while several nano-or micro-textured or fractal structures on the surfaces were formed in the later case.…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism of super water-repellent fractal surfaces of alkylketene dimer

Fang

Mayama

Tsujii

2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Alkylketene dimer (AKD), a kind of wax, has been known to form fractal surfaces spontaneously, and to show super water-repellent property. In order to understand further the super water-repellency of the AKD surfaces and to elucidate the mechanism of spontaneous formation of the fractal structures on the wax surfaces, a pure and a mixed AKD samples were employed to make the surfaces by the melt-solidification method.Time-dependent contact angles of water droplets on the AKD surfaces cured at several temperatures were systematically measured. It was found that spontaneous formation of 2 super water-repellent surfaces was thermally induced quite effectively. For example, it took about 6 days for the pure AKD surface to show the super water-repellency at 40 o C but did just 1 hour at 50 o C. The fractal dimension of the mixed AKD surface with super water-repellency was calculated to be 2.26 from the SEM images by the box-counting method which should be reasonably compared with 2.29 of pure AKD surface. The mechanism for the spontaneous formation of fractal structures was discussed from the results of the time-dependent contact angles, differential scanning calorimetric (DSC) curves and X-ray diffractometric (XRD) patterns. It has been made clear that the fractal AKD surface and its super water-repellency result from the phase transformation from the metastable state to the stable one of the AKD crystals.

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“…Micro-/nanoscale of surface roughness have been fabricated using a number of approaches, such as lithography, 5 etching, 6 immersion processing, 7 sol-gel methods, 8 and chemical vapor deposition. 9 Functional fabrics, such as winter clothes as well as water-repellent, and biodegradable clothing, are gaining increased popularity.…”

Section: -4mentioning

confidence: 99%

Fabrication of Superhydrophobic Surface on a Cellulose-based Material via Chemical Modification

Lee¹,

Hwang²,

Ahn³

2014

Bulletin of the Korean Chemical Society

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Superhydrophobicity is an interesting surface property underlying several fascinating natural phenomena, such as the self-cleaning ability of lotus leaves and the striding ability of spiders, which have attracted much interest in the industry and academia. A superhydrophobic surface is that on which the water contact angle (WCA) is higher than 150 o and the water sliding angle is lower than 10 o , hence, water droplets can easily slide/run off the surface. This principle of high water repellence of a superhydrophobic surface can be extended to practical applications, for example, to develop coatings for automobile windows, tiles, buildings, and clothes.

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Fabrication of Tunable Superhydrophobic Surfaces by Nanosphere Lithography

Cited by 548 publications

References 29 publications

A colloidoscope of colloid-based porous materials and their uses

A colloidoscope of colloid-based porous materials and their uses

Formation mechanism of super water-repellent fractal surfaces of alkylketene dimer

Fabrication of Superhydrophobic Surface on a Cellulose-based Material via Chemical Modification

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