Study of sterilization-treatment in pure and N- doped carbon thin films synthesized by inductively coupled plasma assisted pulsed-DC magnetron sputtering

Javid, Amjed; Kumar, Manish; Han, Jeon G.

doi:10.1016/j.apsusc.2016.09.142

Cited by 12 publications

(6 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A lower duty cycle of pulsed plasmas reduces the physical damage that the plasma can bring to the sample. Normally, a lower duty cycle is favorable only when the etching of a material is desired [30,31,32].…”

Section: Resultsmentioning

confidence: 99%

Cupric Oxide Nanostructures from Plasma Surface Modification of Copper

et al. 2019

View full text Add to dashboard Cite

Taking inspiration from the hydrophilic and superhydrophilic properties observed from the nanostructures present on the leaves of plants such as Alocasia odora, Calathea zebrina, and Ruelia devosiana, we were able to synthesize cupric oxide (CuO) nanostructures from the plasma surface modification of copper (Cu) that exhibits hydrophilic and superhydrophilic properties. The Cu sheets were exposed to oxygen plasma produced from the P300 plasma device (Alliance Concept, Cran-Gevrier, France) at varying power, irradiation times, gas flow rates, and pulsing duty cycles. The untreated and plasma-treated Cu sheets were characterized by contact angle measurements, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) to determine the changes in the surface of Cu before and after plasma treatment. Results showed that plasma-treated Cu sheets exhibited enhanced wetting properties compared to untreated Cu. We attributed the decrease in the measured water contact angles after plasma treatment to increased surface roughness, formation of CuO nanostructures, and transformation of Cu to either CuO2 or Cu2O3. The presence of the CuO nanostructures on the surface of Cu is very useful in terms of its possible applications, such as: (1) in antimicrobial and anti-fouling tubing; (2) in the improvement of heat dissipation devices, such as microfluidic cooling systems and heat pipes; and (3) as an additional protection to Cu from further corrosion. This study also shows the possible mechanisms on how CuO, CuO2, and Cu2O3 were formed from Cu based on the varying the plasma parameters.

show abstract

Section: Resultsmentioning

confidence: 99%

Cupric Oxide Nanostructures from Plasma Surface Modification of Copper

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Meanwhile, dissociation recombination reactions also occur in hybrid plasma. [ 66 ] Due to the enhanced ionization effect, the change of surface roughness by Ar/N 2 hybrid plasma is more significant than those of single Ar or N 2 plasma. Nevertheless, no new bonds or functional groups formed during this process.…”

Section: Discussionmentioning

confidence: 99%

Hybrid Plasma Activation Strategy for the Protein‐Coated Magnesium Implants in Orthopedic Applications

Fang

Zhou

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

properties, corrosion resistance, and especially biocompatibility. Recently, silk fibroin (i.e., SF), a natural protein extracted from Bombyx mori silkworms, has been expected to be a coating strategy that protects of magnesium from corrosion for a long time. [10][11][12][13][14] This biological protein was similar to the collagen components in bone with osteogenic activity, which can endow inorganic Mg with osteoinductivity and osteoconductivity functions as a protective organic coating. However, the surface pretreatment process is essential in the application of biodegradable magnesium alloys, aiming to improve the adhesion force (or bonding strength) between organic protein coatings and inorganic magnesium substrates. [15] Thus, strong bonding at the interface can reinforce the anticorrosion performance of the coated structure in an immersed body fluid environment as well as the biocompatibility.Popular surface pretreatment includes chemical conversion, [16,17] microarc oxidation (MAO), [18,19] and intermediate layers, [20,21] which leads to some concerns regarding reliability or biosafety with increasing reports of clinical trials. The chemical conversion method applies alkaline or acid solutions on magnesium surfaces to form magnesium hydroxide [22] or magnesium fluoride, [23] which is simple and inexpensive. A single chemical conversion layer cannot provide long-term protection yet, and the biosafety of fluorine in vivo needs further confirmation. Although MAO is one of the most widely commercialized surface treatment technologies for magnesium, coatings are usually brittle with holes. Some materials such as poly dopamine [24] or 3-amino-propyltriethoxysilane (APTES, reported by our previous work) [25] are considered intermediate layers to generate bonds between outer coatings and magnesium substrates. However, their biodegradable behaviors are not controlled, and the biocompatibility of APTES is not clear. Generally, all the surface pretreatment technologies above provide one or more intermediate layers between coatings and substrates to improve adhesion at the bonding interfaces. [26][27][28][29] Some problems, including chemical residue, surface contamination, interface cracking probability, uncontrollable degradation, and biocompatibility are potential dangers when making use of intermediate layers, which form two or more bonding interfaces. [30][31][32][33] Biodegradable magnesium alloys show superior potential as bone repair implants, which are coated by natural polymers such as biological proteins to reinforce anticorrosion and biocompatibility. Surface pretreatment can facilitate the adhesion force of the organic coating/inorganic metal interface, but potentially causes one or more unfavorable intermediate layers. Herein, hybrid plasma activation is introduced to modify magnesium alloy (MgZnCa), which is directly coated by a natural protein, silk fibroin (i.e., SF), thus achieving a protein/magnesium direct bonding interface. Different plasmas exhibit distinctive physical and chemical performances o...

show abstract

“…The natural biocompatibility of carbonaceous materials has also increased the use of nC in many bio-applications like biological signal sensing, tissue engineering, and cell proliferation. [75] In medical use, the nC coating can be applied on re-usable instruments and devices which need sterilization after use since nC film is non-toxic, does not launch immunogenic response, and is chemically inert (it can be sterilized multiple times [60]).…”

Section: Nanocrystalline Carbonmentioning

confidence: 99%