Functional Surfaces with Photocatalytic Behavior and Reversible Wettability: ZnO Coating on Silicon Spikes

Frysali, Melani A.; Papoutsakis, Lampros; Kenanakis, George; Anastasiadis, Spiros H.

doi:10.1021/acs.jpcc.5b07736

Cited by 35 publications

(29 citation statements)

References 52 publications

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“…This is a typical potent cationic dye, widely used as a model organic probe to test the photocatalytic performance of photocatalysts 33–35 . The samples were placed in a custom made quartz cell, and the whole setup was illuminated for up to 60 min using a UV lamp centred at 365 nm (Philips HPK 125 W), with a light intensity of ~10 mW/cm 2 .…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In this work, the photocatalytic activity of the ZnO NRs-coated 3D structures was quantified by measuring the decolourization of methylene blue (MB) in aqueous solution (initial concentration: 5.4 × 10 −7 mol/L (20 ppm), pH: 5.5). This is a typical potent cationic dye, widely used as a model organic probe to test the photocatalytic performance of photocatalysts 33 – 35 . The samples were placed in a custom made quartz cell, and the whole setup was illuminated for up to 60 min using a UV lamp centred at 365 nm (Philips HPK 125 W), with a light intensity of ~10 mW/cm 2 .…”

Section: Experimental Methodsmentioning

confidence: 99%

See 1 more Smart Citation

3D micro-structured arrays of ZnΟ nanorods

Giakoumaki¹,

Kenanakis²,

Klini³

et al. 2017

Sci Rep

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The fabrication of nanostructures with controlled assembly and architecture is very important for the development of novel nanomaterial-based devices. We demonstrate that laser techniques coupled with low-temperature hydrothermal growth enable complex three-dimensional ZnO nanorod patterning on various types of substrates and geometries. This methodology is based on a procedure involving the 3D scaffold fabrication using Multi-Photon Lithography of a photosensitive material, followed by Zn seeded Aqueous Chemical Growth of ZnO nanorods. 3D, uniformly aligned ZnO nanorods are produced. The increase in active surface area, up to 4.4 times in the cases presented here, provides a dramatic increase in photocatalytic performance, while other applications are also proposed.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

3D micro-structured arrays of ZnΟ nanorods

Giakoumaki¹,

Kenanakis²,

Klini³

et al. 2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, the SWCNT/TiO 2 film possessed an excellent self‐cleaning ability after contamination with oils because of the photocatalytic property of TiO 2 , which considerably improved the durability of the film and suggested the possibility of separating oil/water emulsions on a large scale. Frysali et al compared the wettability transitions on a ZnO‐treated flat Si substrate and on a ZnO‐treated surface with silicon microspikes. A narrower WCA transition from 40° and 70° was observed on the former substrate compared to the ZnO‐ coated microspike‐roughened Si substrate, on which a wider WCA transition from 157° to 30° occurred.…”

Section: Manipulation Of Liquid Wetting Behaviorsmentioning

confidence: 99%

Stimuli‐Responsive Bioinspired Materials for Controllable Liquid Manipulation: Principles, Fabrication, and Applications

Wang

Xin

2017

Adv Funct Materials

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Many emerging interfacial technologies, such as self-cleaning surfaces, oil/ water separation, water collection, and microfluidics, are essentially liquid manipulation processes. In this regard, micro-nanostructures of the living organisms are highly preferable, by virtue of the evolutionary pressure and the adaptation to the specific environments, to inspire the optimization of man-made interfaces. With the increasing demands of modern life, research, and industry, intelligent materials with stimuli-responsive liquid manipulation functions have gained substantial attention from interfacial scientists. This review introduces the recent progress in the development of stimuli-responsive liquid-manipulating materials with bioinspired structures and surface chemistry according to two classified manipulation modes: (i) smart manipulation of liquid wetting behaviors, including lyophobic/lyophilic and superlyophobic/superlyophilic, and (ii) smart manipulation of liquid motion behaviors, including coalescence, transportation, rolling/adhesion, and sliding/pinning.At the beginning of the presentation of each classification, the theoretical basis and the sources of inspiration are introduced comprehensively to ensure a better understanding. This review mainly focuses on the mechanisms, fabrication, and applications of the state-of-the-art works related to smart and biomimetic liquid-manipulating materials. Finally, conclusions and future prospects are provided, and the remaining problems and promising breakthroughs in fabricating large-scale, cost-effective, and efficient smart liquid-manipulating materials are outlined.

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“…Otherwise, the growth of ZnO can also be induced on pre-structured surfaces. For example, a smooth ZnO film was added to Si nanospikes to reach reversible wettability and photocatalytic behavior [78,79].…”

mentioning

confidence: 99%

Switchable and Reversible Superhydrophobic Surfaces: Part One

Taleb¹,

Darmanin²,

Guittard³

2018

Interdisciplinary Expansions in Engineering and Design With the Power of Biomimicry

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In this chapter, most of the methods used in the literature to prepare switchable and reversible superhydrophobic surfaces are described. Inspired by Nature, it is possible to induce the Cassie-BaxterÀWenzel transition using different external stimuli such as light, temperature, pH, ion exchange, voltage, magnetic field, mechanic stress, plasma, ultrasonication, solvent, gas or guest. Such properties are extremely important for various applications but especially for controllable oil/water separation membranes, oilabsorbing materials and water harvesting systems.

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Functional Surfaces with Photocatalytic Behavior and Reversible Wettability: ZnO Coating on Silicon Spikes

Cited by 35 publications

References 52 publications

3D micro-structured arrays of ZnΟ nanorods

3D micro-structured arrays of ZnΟ nanorods

Stimuli‐Responsive Bioinspired Materials for Controllable Liquid Manipulation: Principles, Fabrication, and Applications

Switchable and Reversible Superhydrophobic Surfaces: Part One

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