Structure and density profile of diamond-like carbon films containing copper: Study by X-ray reflectivity, transmission electron microscopy, and spectroscopic ellipsometry

Jurkevičiūtė, Aušrinė; Lazauskas, Algirdas; Tamulevičius, Tomas; Vasiliauskas, Andrius; Peckus, Domantas; Meškinis, Šarūnas; Tamulevičius, Sigitas

doi:10.1016/j.tsf.2016.10.015

Cited by 16 publications

(9 citation statements)

References 47 publications

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“…This redshift indicates a graphitization of the matrix which on the other hand is reduced, compared with other metal containing carbon nanocomposites [42]. The values of the second oscillator are indicating the position of the LSPR absorption which are also in accordance with similar nanocomposite system [43,44].…”

Section: Hdlc With Metal Npssupporting

confidence: 52%

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

et al. 2020

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In this work, the synthesis and characterization of hydrogenated diamond-like carbon (HDLC) nanocomposite thin films with embedded metallic Ag and Cu nanoparticles (NPs) are studied. These nanocomposite films were deposited using a hybrid technique with independent control over the carbon and metal sources. The metallic nanoparticles were directly deposited from the gas phase, avoiding surface diffusion of metal species on the deposition surface. The structural features, surface topography and optical properties of pure and nanocomposite HDLC films are studied and the effect of metal introduction into the carbon matrix is discussed. The interactions between the carbon ion beam and the NPs are considered and it is demonstrated that the nanocomposite HDLC:metal films, especially for Cu NPs, can retain the transparency level of the pure HDLC, by limiting the interactions between metal and carbon during deposition.

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Section: Hdlc With Metal Npssupporting

confidence: 52%

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

et al. 2020

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“…2 times smaller than nanoparticles visible on the surface (Figure 1 b, d, f, h). Some layering is seen at the initial stage of the film growth that was earlier observed experimentally by Jurkevičiūtė et al [33] and analysed theoretically by Kairaitis et al [34] where it is explained as a dominating layered growth mechanism over columnar one at lower substrate temperatures due to the lower diffusion coefficient. For the antimicrobial analysis the experiments are usually carried out in aqueous environments mimicking the natural environment and human temperature therefore it is important to investigate their behaviour in similar time frames and temperature ranges [9].…”

Section: Properties Of the Dlc:cu Films In Aqueous Mediamentioning

confidence: 61%

“…Some layering is seen at the initial stage of the film growth that was earlier observed experimentally by Jurkevičiūtė et al . [33] and analysed theoretically by Kairaitis et al . [34] where it is explained as a dominating layered growth mechanism over columnar one at lower substrate temperatures due to the lower diffusion coefficient.…”

Section: Resultsmentioning

confidence: 99%

Antiviral and Antibacterial Efficacy of Nanocomposite Amorphous Carbon Films with Copper Nanoparticles

Bakhet,

Tamulevičienė,

Vasiliauskas

et al. 2023

Preprint

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Copper compound-rich films and coatings are effective against widespread viruses and bacteria. Even though the killing mechanisms are still debated it is agreed that the metal ion, nanoparticle release, and surface effects are of paramount importance in the antiviral and antibacterial efficacy of the surfaces. In this work we have investigated the behaviour of the reactive magnetron sputtered nanocomposite diamond-like carbon thin films with copper nanoparticles (DLC:Cu). The films were etched employing oxygen plasma and/or exposed to ultra-pure water aiming to investigate the differences of the Cu release in the medium and changes in film morphology. Pristine films were more effective in the Cu release reaching up to 1.3 mg/L/cm2concentration. Plasma processing resulted in the oxidation of the films which released less Cu but after exposure to water, their average roughness increased more, up to 5.5 nm. Pristine and O2plasma processed DLC:Cu films were effective against both model coronavirus and herpesvirus after 1-hour contact time and reached virus reduction up to 2.23 and 1.63 log10, respectively. Pristine DLC:Cu films were more effective than plasma-processed ones against herpesvirus, while less expressed difference was found for coronavirus. A bactericidal study confirmed that pristine DLC:Cu films were effective against gram-negativeE. coliand gram-positiveE. faecalisbacteria. After 3 hours 100% antibacterial efficiency (ABE) was obtained forE. coliand 99.83% forE. faecalis. After 8 hours and longer exposures, 100% ABE was reached. The half-life inactivation of viruses was 8.10 – 11.08 minutes and forE. faecalis19.5 – 30.2 minutes.

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“…Component A is the component which segregates to the surface of a film. Depending on system, both metal [23,24] or carbon [15,16,23] may segregate to the surface. Component A is the host material, and in nanocomposites, the host material mostly is carbon.…”

Section: Modelmentioning

confidence: 99%

“…Despite several models based on segregation proposed, catalytic action of metal, radiation enhanced diffusion, etc. [15,16], the origin of layering and its mechanism and dynamics are not fully understood. It was found experimentally that there is some minimum metal content required to form a layered structure [17,18].…”

Section: Introductionmentioning

confidence: 99%

Mechanisms and Dynamics of Layered Structure Formation During Co-Deposition of Binary Compound Thin Films

Kairaitis

Galdikas

2019

Coatings

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In the present paper, the formation of columnar and layered structure during co-deposition of binary thin films is analyzed by kinetic modeling. The kinetic model is based on phase field theory and involves the main processes taking place during binary film growth: adsorption, phase separation, Gibbsian surface segregation, surface and bulk diffusion. The process of phase separation is defined by the Cahn-Hilliard equation, which describes well the kinetics of formation of nanoparticles in binary system with a limited solubility of components. The formation of columns and layers can occur only if other processes such as diffusion and segregation take place. In this paper, the most attention is paid to the formation of multilayered structures during binary components co-deposition, which is experimentally observed, but whose mechanism of formation is not well understood. In the work presented, the mechanism of formation of layers is shown, and the conditions at which this mechanism starts to work are formulated. It is shown that very important aspects are surface segregation of one of the components and depth dependent diffusion.

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Structure and density profile of diamond-like carbon films containing copper: Study by X-ray reflectivity, transmission electron microscopy, and spectroscopic ellipsometry

Cited by 16 publications

References 47 publications

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

Antiviral and Antibacterial Efficacy of Nanocomposite Amorphous Carbon Films with Copper Nanoparticles

Mechanisms and Dynamics of Layered Structure Formation During Co-Deposition of Binary Compound Thin Films

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