A ZnO nanowire array film with stable highly water-repellent properties

Badre, Chantal; Pauporté, Thierry; Turmine, Mireille; Lincot, Daniel

doi:10.1088/0957-4484/18/36/365705

Cited by 111 publications

(102 citation statements)

References 27 publications

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“…72,73 So far, most previous works have been focused mainly on ZnO nanorods, nanowires, and nanobelts. 72,74,75 However, it remains a big challenge to develop simple and reliable synthetic methods for ZnO hierarchical architectures with controlled morphology, which are important to amplify the photoswitching effect and to explore in detail the effect of roughness on photoresponse. We have developed a two-step approach in order to achieve a ZnO surface exhibiting roughness at two length scales.…”

Section: Photoswitchable Surfacesmentioning

confidence: 99%

Biomimetic micro/nanostructured functional surfaces for microfluidic and tissue engineering applications

2011

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1 This paper reviews our work on the application of ultrafast pulsed laser micro/ nanoprocessing for the three-dimensional ͑3D͒ biomimetic modification of materials surfaces. It is shown that the artificial surfaces obtained by femtosecond-laser processing of Si in reactive gas atmosphere exhibit roughness at both micro-and nanoscales that mimics the hierarchical morphology of natural surfaces. Along with the spatial control of the topology, defining surface chemistry provides materials exhibiting notable wetting characteristics which are potentially useful for open microfluidic applications. Depending on the functional coating deposited on the laser patterned 3D structures, we can achieve artificial surfaces that are ͑a͒ of extremely low surface energy, thus water-repellent and self-cleaned, and ͑b͒ responsive, i.e., showing the ability to change their surface energy in response to different external stimuli such as light, electric field, and pH. Moreover, the behavior of different kinds of cells cultured on laser engineered substrates of various wettabilities was investigated. Experiments showed that it is possible to preferentially tune cell adhesion and growth through choosing proper combinations of surface topography and chemistry. It is concluded that the laser textured 3D micro/ nano-Si surfaces with controllability of roughness ratio and surface chemistry can advantageously serve as a novel means to elucidate the 3D cell-scaffold interactions for tissue engineering applications.

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Section: Photoswitchable Surfacesmentioning

confidence: 99%

Biomimetic micro/nanostructured functional surfaces for microfluidic and tissue engineering applications

2011

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“…It has a wide and direct band gap of 3.37 eV at 300 K and a large free exciton binding energy of 60 meV [3]. It has unique physical and chemical properties [4], low-dimensional volume, high aspect ratio, light-matter interaction, cost-effectiveness and can be synthesized by various chemical and physical methods [5][6][7][8][9][10][11]. ZnO has become one of the most popular materials for electrical and optical applications over the time.…”

Section: Introductionmentioning

confidence: 99%

Improving the optical and electrical properties of Zinc Oxide thin film by Cupric Oxide dopant

Nawar¹,

Aal²,

Said³

et al. 2014

IOSRJAP

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“…In recent years single-crystal ZnO nanowire arrays have emerged as promising building blocks for a new generation of devices in different technological domains such as optoelectronics [9,10], solar cells [11,12], gas sensing [13,14], field emission [15,16], piezoelectrics [17] and microfluidics [18]. Once the potential of single crystal ZnO nanowires in nanostructured devices has been shown, further investigations were required to enhance their performances.…”

mentioning

confidence: 99%

Electrodeposition and impedance spectroscopy characterization of ZnO nanowire arrays

Tena‐Zaera

Elias

Lévy‐Clément

et al. 2008

Physica Status Solidi (a)

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An overview of the electrodeposition of ZnO nanowire arrays from the reduction of dissolved molecular oxygen in zinc chloride solutions was reported. In spite of the internal structure of ZnO which favours the anisotropic growth along the [0001] direction, the change in the local composition of the electrolyte around the nanowire during the electrodeposition was proposed as a major parameter to affect the nanowire growth mechanism. The influence of the ratio between the O2 reduction rate and the diffusion of Zn2+ to the cathode was emphasized. Due to the particular morphology of the nanowire arrays, no lateral growth was observed when the reduction of O2 was relatively fast, while the corresponding deposition efficiency was very low. The decrease of the O2 reduction rate resulted in an enhancement of the deposition efficiency. The highest efficiencies (40–55%) were attained by using high chloride concentrations ([KCl] = 3.4 M) resulting not only in an enhancement of the longitudinal growth, but also in a considerable lateral growth. The influence of the electrodeposition conditions on the donor density of ZnO nanowires was investigated by using electrochemical impedance spectroscopy. Donor densities from 5 × 1019 cm–3 to 3 × 1020 cm–3 were obtained for as deposited samples. They decreased to values in the range of 1017–1018 cm–3 after annealing in air (1 hour at 450 °C). (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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A ZnO nanowire array film with stable highly water-repellent properties

Cited by 111 publications

References 27 publications

Biomimetic micro/nanostructured functional surfaces for microfluidic and tissue engineering applications

Biomimetic micro/nanostructured functional surfaces for microfluidic and tissue engineering applications

Improving the optical and electrical properties of Zinc Oxide thin film by Cupric Oxide dopant

Electrodeposition and impedance spectroscopy characterization of ZnO nanowire arrays

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