Surface Stoichiometry and Optical Properties of Cux–TiyCz Thin Films Deposited by Magnetron Sputtering

Roy, Avishek; Mukhopadhyay, Arun Kumar; Das, Sadhan Chandra; Bhattacharjee, Gourab; Majumdar, Abhijit; Hippler, R.

doi:10.3390/coatings9090551

Cited by 48 publications

(26 citation statements)

References 27 publications

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“…So it can be concluded that for optimum conductivity, the C content should not exceed more than 50%. The evaluation of band-gap of Cu-TiC thin film is already reported in the range between 1.83 eV to 2.2 eV [10]. The inclusion of Cu with TiC phase has formed a film with band-gap close to that of a semiconductor.…”

Section: Xrd Analysismentioning

confidence: 96%

“…The synthesis of Cu-TiC composites is mostly performed by following self-propagating high-temperature synthesis [1,9], DC/HiPIMS magnetron sputtering system [10], microwave processing [11] or powder metallurgy [2,9,12] involving mostly mechanical ball milling [13,14] and infiltration technique [3]. Earlier it has been reported that TiC x with different values of x, can directly influence the distribution of carbides in TiC stoichiometry of Cu-TiC composites [9].…”

Section: Introductionmentioning

confidence: 99%

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Carbon impact on surface morphology and electrical properties of Cu-TiC thin film

Roy

Hembram

Ghosh

et al. 2020

Mater. Res. Express

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In recent years, synthesis of TiC reinforced Cu matrix composites are comprehensively utilized for industrial applications. Synthesis of Cu-TiC as a thin film can also be an intriguing challenge for such applications. In this work, Cu-TiC thin film was deposited by DC magnetron co-sputtering method and examined to investigate the role of C content on the micro-structure, electrical conductivity and surface morphology by using XRD, UV-vis spectroscopy, I-V characteristics, AFM, SEM and EDX analysis. The wt% of C was varied from 14 to 67% while depositing the Cu-TiC films. All the films have resulted to be polycrystalline with Cu and TiC phases. The optical band-gap has decreased from 2.59 to 1.93 eV and the refractive index got enhanced from 2.92 to 3.38 with increase in wt% of C. The ideality factor, electrical resistance, surface roughness across the films has also decreased as wt% of C was increased in Cu-TiC films.

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Section: Xrd Analysismentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Carbon impact on surface morphology and electrical properties of Cu-TiC thin film

Roy

Hembram

Ghosh

et al. 2020

Mater. Res. Express

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“…The left subpeaks (green lines) observed at 934.5 and 954.3 eV are characteristic of the Cu 2+ , while the right subpeaks (blue lines) observed at 932.5 and 952.4 eV can be attributed to the Cu + , which are reduced from a fraction of Cu 2+ . Furthermore, two accompanying shakeup satellite peaks corroborated the presence of a coordination interaction in the form of Cu 2+ . The similarly divided subpeaks of Cu 2p suggested their electronic similarities.…”

Section: Results and Discussionmentioning

confidence: 79%

“…41 Furthermore, two accompanying shakeup satellite peaks corroborated the presence of a coordination interaction in the form of Cu 2+ . 42 The similarly divided subpeaks of Cu 2p suggested their electronic similarities. However, as shown in Figure S10, no Zn 2p was detected in the M 4+ and Zn 2+ co-blended MM-MON films, resulting from the fast dissolution of Zn 2+ due to the weakest and a relatively longer Zn−O bond (Table S4), thus bearing the worst coordination ability.…”

Section: Resultsmentioning

confidence: 95%

A Gold Nanocluster Constructed Mixed-Metal Metal–Organic Network Film for Combating Implant-Associated Infections

et al. 2020

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The development of modular strategies for programming self-assembled supramolecular architectures with distinct structural and functional features is of immense scientific interest. We reported on the intrinsic antibacterial capability of anionic amphiphilic gold nanoclusters (GNCs) capped by para-mercaptobenzoic acid, which was closely related to the protonation level of terminal carboxylate groups. By using of the metal−ligand coordination-driven and solvent evaporation-induced self-assembly, we constructed GNCs-based mixed-metal metal−organic network (MM-MON) films on titanium disks as antibacterial nanocoatings. Taking the reasonable utilization of tetravalent metal ions M 4+ (Ti, Zr, Hf; hard Lewis acid) and bactericidal divalent metal ions M 2+ (Cu, Zn; borderline acid) co-incorporated metal−carboxylate coordination bonds, the MM-MON films exhibited superior stability due to the robust M 4+ −O bonds and M 2+ releasing behavior resulting from the labile M 2+ −O coordinating. Together, the MM-MON films integrated the bacteria-responsive character of GNCs, exceptional chemical stability, and greatly enhanced antibacterial activity, ultimately killing adherent bacteria and initiating a self-defensive function. In a rat model for subcutaneous implant-associated infection, the MM-MON nanocoating showed an approximately 2 and 1 log lower multidrugresistant Staphylococcus aureus implant and tissue colonization, respectively. The generalizable modular strategy of the GNC− metal networks is amenable to facilitate the functionalization of metal surfaces for combating implant-associated infections.

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“…In this way, the electron density of the carbon atom decreases, causing the BE to drop from 288.77 to 288.43 eV. The low-resolution spectra for copper are presented in Figure S2 in Supplementary, evidencing the predominance of Cu(II) species in the alginate beads based on the peaks that correspond to Cu 2p2/3, and Cu 2p1/2 [ 58 , 59 , 60 , 61 , 62 ].…”

Section: Resultsmentioning

confidence: 99%

Role of Alginate Composition on Copper Ion Uptake in the Presence of Histidine or Beta-Amyloid

et al. 2022

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The anomalous interaction between metal ions and the peptide beta-amyloid is one of the hallmarks of Alzheimer’s disease. Metal-binding biopolymers, including polysaccharides, can elucidate the fundamental aspects of metal ions’ interactions with biological tissue and their interplay in Alzheimer’s disease. This work focuses on the role of the alginate composition on Cu(II) adsorption in the presence of histidine or β-amyloid, the peptide associated with the progression of Alzheimer’s disease. Alginate samples with different mannuronic/guluronic (M/G) ratios led to similar Cu(II) adsorption capacities, following the Langmuir isotherm and the pseudo-second-order adsorption kinetic models. Although the presence of histidine produced up to a 20% reduction in the copper adsorption capacity in guluronic-rich alginate samples (M/G~0.61), they presented stable bidentate chelation of the metallic ion. Chemical analyses (FTIR and XPS) demonstrated the role of hydroxyl and carboxyl groups in copper ion chelation, whereas both crystallinity and morphology analyses indicated the prevalence of histidine interaction with guluronic-rich alginate. Similar results were observed for Cu(II) adsorption in alginate beads in the presence of beta-amyloid and histidine, suggesting that the alginate/histidine system is a simple yet representative model to probe the application of biopolymers to metal ion uptake in the presence of biological competitors.

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Surface Stoichiometry and Optical Properties of Cux–TiyCz Thin Films Deposited by Magnetron Sputtering

Cited by 48 publications

References 27 publications

Carbon impact on surface morphology and electrical properties of Cu-TiC thin film

Carbon impact on surface morphology and electrical properties of Cu-TiC thin film

A Gold Nanocluster Constructed Mixed-Metal Metal–Organic Network Film for Combating Implant-Associated Infections

Role of Alginate Composition on Copper Ion Uptake in the Presence of Histidine or Beta-Amyloid

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