Superoleophobic and Superhydrophobic Surfaces from Microtextured ZnO-Based Surfaces on Si Substrate

Liu, Chang Song; Zhang, Qiang; Tao, Li; Li, Zhi Wen

doi:10.4028/www.scientific.net/kem.434-435.538

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…Please see Ref. 12 for more details of this modification process Characterization. ZnO powders were evaluated with a scanning electron microscope (SEM; 3500, Hitachi, Japan) and X-ray diffractometer (XRD; D8 Advanced, Bluker, German).…”

Section: Methodsmentioning

confidence: 99%

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Preparation of Flower-Like ZnO Micro-Sphere Powders and their Surface Wettability Modification

Liu

et al. 2011

AMR

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Three-dimensitional flower-like ZnO powders were prepared by using a simple aqueous solution method. Their surface wettability was modified via some long chain alkylsilanes with low surface energy. The microstructures and the wettability properties were studied by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and contact angle measurement (CAM). The ZnO powders are spheric and are about 5 micrometers in diameter. The boundary of the microspheres are not smooth, but petaliform in nanoscale, which demonstrate a hierarchical microstructure. The as-synthesized powders have a superhydrophobicity with water contact angle of more than 150°, and have a high adhesion to water. After modified by alkylsilanes, however, the ZnO powders demonstrate a strong anti-adhesion to water. When modified by fluorinated alkylsilanes, the surface of ZnO microspheres had a water contact angle up to 170°. Also, the water droplet could bounce against the surface just like a spring ball, and there are not any water traces left when the water droplets contact the surfaces of ZnO powders. The results provide a simple method to repel the water wetting and will be helpful to disperse the powders especially in a humid environment.

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Section: Methodsmentioning

confidence: 99%

“…Recently, a few reports concerned the wettability of ZnO nanomaterials [7][8][9][10][11][12]. Fujishima group firstly studied the wettability of ZnO [7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Flower-Like ZnO Micro-Sphere Powders and their Surface Wettability Modification

Liu

et al. 2011

AMR

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“…Voevodin et al investigated laser surface texturing of TiCN coatings to permit storage of solid lubricants and results showed that the lifetime of solid lubricants on dimpled surfaces was multifold longer than those on an unmodified surface [14]. In addition, the texture induced on the surface has important applications in the following broad areas of research and development, such as amplifying cell adhesion and proliferation for biomedical applications, enhancing light reflecting behaviors in optical usage, and changing the surface wetting performances for anti-biofouling [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Polydopamine-Assisted Immobilization of Chitosan Brushes on a Textured CoCrMo Alloy to Improve its Tribology and Biocompatibility

et al. 2019

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Due to their bioinert and reliable tribological performance, cobalt chromium molybdenum (CoCrMo) alloys have been widely used for articular joint implant applications. However, friction and wear issues are still the main reasons for the failure of implants. As a result, the improvement of the tribological properties and biocompatibility of these alloys is still needed. Thus, surface modification is of great interest for implant manufacturers and for clinical applications. In this study, a strategy combining laser surface texturing and chitosan grafting (mussel inspired) was used to improve the tribological and biocompatible behaviors of CoCrMo. The microstructure and chemical composition were investigated by atomic force microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy, respectively. The tribological properties were discussed to determine their synergistic effects. To evaluate their biocompatibility, osteoblast cells were cocultured with the modified surface. The results show that there is a distinct synergistic effect between laser surface texturing and polymer brushes for improving tribological behaviors and biocompatibility. The prepared chitosan brushes on a textured surface are a strong mechanism for reducing friction force. The dimples took part in the hydrodynamic lubrication and acted as the container for replenishing the consumed lubricants. These brushes also promote the formation of a local lubricating film. The wear resistance of the chitosan brushes was immensely improved. Further, the worn process was observed, and the mechanism of destruction was demonstrated. Co-culturing with osteoblast cells showed that the texture and grafting have potential applications in enhancing the differentiation and orientation of osteoblast cells.

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“…There have been reports on developing superhydrophobic ZnO nanostructured surfaces for anti-wetting applications [2,3,[11][12][13][14][15][16][17]. Kwak et al [14] reported superhydrophobic ZnO nanorods grown by wet-chemical technique after their surface modification with long chain hydrocarbon oligomers.…”

Section: Introduction mentioning

confidence: 99%

Superhydrophobic and Highly Oleophobic Zinc Sheet Surfaces Developed by a Simple Technique

Khedir¹

2016

JMSE-B

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In this report, superhydrophobic and highly oleophobicmicro-nano-scale roughened Zn sheet surfaces were obtained. A simple and environmentally friendly technique of immersing Zn sheets in hot deionized water was used to grow ZnO nanorods. Variation of the immersion time had a significant impact on the evolution and formation of the nanorods. After their concealing with long chain fluorocarbon oligomers of 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PFDTS), ZnO nanorod surfaces prepared at 60 min immersion time showed the highest wetting repellency properties toward water and peanut oil. However the surfaces yet to be able to super repel the two liquids. In order to improve the Zn sheet surfaces repellency toward liquids with various surface tensions, hierarchical structures with the combination of both micro channels covered-up with ZnO nanorods were developed. Simple technique of one-directional mechanical sanding was used to impart micro channeled structures onto Zn sheet surfaces and post immersion in hot de-ionized water for ZnO nanorods cover-up. The concealed micro-nano-combination structures with 1H, PFDTS oligomers showed superhydrophobic and highly oleophobic properties. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Photoluminescence (PL) techniques were used to characterize the morphology of the prepared surfaces.

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Superoleophobic and Superhydrophobic Surfaces from Microtextured ZnO-Based Surfaces on Si Substrate

Cited by 4 publications

References 14 publications

Preparation of Flower-Like ZnO Micro-Sphere Powders and their Surface Wettability Modification

Preparation of Flower-Like ZnO Micro-Sphere Powders and their Surface Wettability Modification

Polydopamine-Assisted Immobilization of Chitosan Brushes on a Textured CoCrMo Alloy to Improve its Tribology and Biocompatibility

Superhydrophobic and Highly Oleophobic Zinc Sheet Surfaces Developed by a Simple Technique

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