Nanostructures formed on carbon-based materials with different levels of crystallinity using oxygen plasma treatment

Ko, Tae-Jun; Jo, Wonjin; Lee, Heon Ju; Oh, Kyu Hwan; Moon, Myoung‐Woon

doi:10.1016/j.tsf.2015.02.040

Cited by 19 publications

(13 citation statements)

References 24 publications

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“…The ablation process can be used, along with chemical surface modification, to create grooves along which the cells align themselves during adhesion [34,35]. The surface along the grooves becomes functionalized by oxygen groups and its roughness increases [36], which leads to an increased cell adhesion in the modified area.…”

Section: Laser Treatmentmentioning

confidence: 99%

Surface Modification of Polymer Substrates for Biomedical Applications

2017

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While polymers are widely utilized materials in the biomedical industry, they are rarely used in an unmodified state. Some kind of a surface treatment is often necessary to achieve properties suitable for specific applications. There are multiple methods of surface treatment, each with their own pros and cons, such as plasma and laser treatment, UV lamp modification, etching, grafting, metallization, ion sputtering and others. An appropriate treatment can change the physico-chemical properties of the surface of a polymer in a way that makes it attractive for a variety of biological compounds, or, on the contrary, makes the polymer exhibit antibacterial or cytotoxic properties, thus making the polymer usable in a variety of biomedical applications. This review examines four popular methods of polymer surface modification: laser treatment, ion implantation, plasma treatment and nanoparticle grafting. Surface treatment-induced changes of the physico-chemical properties, morphology, chemical composition and biocompatibility of a variety of polymer substrates are studied. Relevant biological methods are used to determine the influence of various surface treatments and grafting processes on the biocompatibility of the new surfaces—mammalian cell adhesion and proliferation is studied as well as other potential applications of the surface-treated polymer substrates in the biomedical industry.

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Section: Laser Treatmentmentioning

confidence: 99%

Surface Modification of Polymer Substrates for Biomedical Applications

2017

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“…2a-f). 18 At the beginning of plasma etching, the specimens did not show differences in the diameters and lengths of nanostructures, but the lengths of the nanostructures varied as oxygen plasma etching time increased ( Fig. 2g and i).…”

Section: Resultsmentioning

confidence: 88%

Effect of crystallinity on the recovery rate of superhydrophobicity in plasma-nanostructured polymers

Moon

Park

2020

RSC Adv.

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“…Therefore, as the center of the PET disc suffered from a lack of metal co-deposition, the height and distribution of the high-aspect-ratio nanostructures hardly managed to form uniformly over the large area. It has been reported that the concentration of metallic compounds on the polymeric surface corresponds to the roughness of the nanostructured surface 32 . As the size of the substrate is relatively larger than the cathode plate, the sputtered atoms, serving as the nanoscale etching mask, cannot reach the entire region on the target substrate.…”

Section: Resultsmentioning

confidence: 99%

“…Until 10 min of plasma treatment, the concentration of metal compounds from the co-deposition of sputtered atoms is not sufficient to form metallic clusters that act as a nanoscale etch mask, so the surface roughness is maintained at a low level of few nm. With increasing plasma treatment duration over 10 min, nanoscale bumps with a low aspect ratio evolve into nanopillar or nanohairy structures through further anisotropic etching, which is induced by the nanoscale etch masks 29,32 . The change in morphology of the nanostructure leads to roughness (R q ) increment to 40.9, 61.2, and 89.4 nm for the plasma treatment of 30, 40, and 60 min, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…. This template-less method is a time-saving and eco-friendly process for the large-scale fabrication of nanostructures with tunable structural shapes such as dot, pillar, or hairy 32,33 . However, there are some limits to applying this method in large-scale fabrication, as the formation of the etching mask from the supply of the co-deposited metal atoms may not be uniform over a large surface area.…”

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confidence: 99%

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Single-step plasma-induced hierarchical structures for tunable water adhesion

Park

Kim

et al. 2020

Sci Rep

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Smart surfaces in nature have been extensively studied to identify their hierarchical structures in micro-/nanoscale to elucidate their superhydrophobicity with varying water adhesion. However, mimicking hybrid features in multiscale requires complex, multi-step processes. Here, we proposed a one-step process for the fabrication of hierarchical structures composed in micro-/nanoscales for superhydrophobic surfaces with tunable water adhesion. Hierarchical patterns were fabricated using a plasma-based selective etching process assisted by a dual scale etching mask. As the metallic mesh is placed above the substrate, it serves the role of dual scale etching masks on the substrate: microscale masks to form the micro-wall network and nanoscale masks to form high-aspect-ratio nanostructures. the micro-walls and nanostructures can be selectively hybridized by adjusting the gap distance between the mesh and the target surface: single nanostructures on a large area for a larger gap distance and hybrid/hierarchical structures with nanostructures nested on micro-walls for a shorter gap distance. The hierarchically nanostructured surface shows superhydrophobicity with low water adhesion, while the hybrid structured surface becomes become superhydrophobic with high adhesion. these water adhesion tunable surfaces were explored for water transport and evaporation. Additionally, we demonstrated a robust superhydrophobic surface with anti-reflectance over a large area.

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Nanostructures formed on carbon-based materials with different levels of crystallinity using oxygen plasma treatment

Cited by 19 publications

References 24 publications

Surface Modification of Polymer Substrates for Biomedical Applications

Surface Modification of Polymer Substrates for Biomedical Applications

Effect of crystallinity on the recovery rate of superhydrophobicity in plasma-nanostructured polymers

Single-step plasma-induced hierarchical structures for tunable water adhesion

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