Influence of Silver Incorporation on the Structural and Electrical Properties of Diamond-Like Carbon Thin Films

Dwivedi, Neeraj; Kumar, Sushil; Carey, J. D.; Tripathi, Ratnakar; Malik, Hitendra K.; Dalai, M. K.

doi:10.1021/am4003183

Cited by 46 publications

(25 citation statements)

References 33 publications

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“…In general, the introduction of metals in a-C promotes the sp 2 carbon bonding. 54,55 Recently, Tritsaris et al 56 have also theoretically established that the introduction of metals in diamond-like carbon (DLC) promotes sp 2 carbon bonding and that its effect can be significant at the metal/C interface. In our work, the CoCrPt:oxide media was used as a substrate for the deposition of all the overcoats.…”

Section: Resultsmentioning

confidence: 99%

Atomic Scale Interface Manipulation, Structural Engineering, and Their Impact on Ultrathin Carbon Films in Controlling Wear, Friction, and Corrosion

Dwivedi

Yeo

Yak

et al. 2016

ACS Appl. Mater. Interfaces

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Reducing friction, wear, and corrosion of diverse materials/devices using <2 nm thick protective carbon films remains challenging, which limits the developments of many technologies, such as magnetic data storage systems. Here, we present a novel approach based on atomic scale interface manipulation to engineer and control the friction, wear, corrosion, and structural characteristics of 0.7-1.7 nm carbon-based films on CoCrPt:oxide-based magnetic media. We demonstrate that when an atomically thin (∼0.5 nm) chromium nitride (CrNx) layer is sandwiched between the magnetic media and an ultrathin carbon overlayer (1.2 nm), it modifies the film-substrate interface, creates various types of interfacial bonding, increases the interfacial adhesion, and tunes the structure of carbon in terms of its sp(3) bonding. These contribute to its remarkable functional properties, such as stable and lowest coefficient of friction (∼0.15-0.2), highest wear resistance and better corrosion resistance despite being only ∼1.7 nm thick, surpassing those of ∼2.7 nm thick current commercial carbon overcoat (COC) and other overcoats in this work. While this approach has direct implications for advancing current magnetic storage technology with its ultralow thickness, it can also be applied to advance the protective and barrier capabilities of other ultrathin materials for associated technologies.

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Section: Resultsmentioning

confidence: 99%

Atomic Scale Interface Manipulation, Structural Engineering, and Their Impact on Ultrathin Carbon Films in Controlling Wear, Friction, and Corrosion

Dwivedi

Yeo

Yak

et al. 2016

ACS Appl. Mater. Interfaces

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“…The G peak corresponds to the symmetrical E 2g vibrational mode in graphite-like sp 2 material and arises from the bond stretching motion of all pairs of sp 2 atoms in both rings and chains against the restoring force34. The D peak corresponds to the A 1g breathing mode of phonons near the zone boundary and appears in the presence of disorder caused by sp 2 atoms in the rings35. Hence, both D and G peaks are associated with sp 2 C bonding.…”

Section: Resultsmentioning

confidence: 99%

Probing the Role of an Atomically Thin SiNx Interlayer on the Structure of Ultrathin Carbon Films

Dwivedi

Rismani-Yazdi

Yeo

et al. 2014

Sci Rep

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Filtered cathodic vacuum arc (FCVA) processed carbon films are being considered as a promising protective media overcoat material for future hard disk drives (HDDs). However, at ultrathin film levels, FCVA-deposited carbon films show a dramatic change in their structure in terms of loss of sp3 bonding, density, wear resistance etc., compared to their bulk counterpart. We report for the first time how an atomically thin (0.4 nm) silicon nitride (SiNx) interlayer helps in maintaining/improving the sp3 carbon bonding, enhancing interfacial strength/bonding, improving oxidation/corrosion resistance, and strengthening the tribological properties of FCVA-deposited carbon films, even at ultrathin levels (1.2 nm). We propose the role of the SiNx interlayer in preventing the catalytic activity of Co and Pt in media, leading to enhanced sp3C bonding (relative enhancement ~40%). These findings are extremely important in view of the atomic level understanding of structural modification and the development of high density HDDs.

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“…Among them diamond like carbon, zinc oxide and titanium oxide thin films were more applicable than others [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on the properties of TiO2 nanoparticle

Jasbi

Dorranian

2016

J Theor Appl Phys

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Effect of aging on the properties of titanium dioxide nanoparticles produced by laser ablation process in water is investigated experimentally. The fundamental wavelength of a Q-switched Nd:YAG laser was employed to irradiate a high-purity Ti plate in distilled water at temperatures of 20, 35, 50 and 65°C. Produced nanoparticles were diagnosed by UV-Vis-NIR spectroscopy, X-ray diffraction method, and dynamic light scattering device immediately after production and 1 week after. Bandgap energy of samples was extracted using Tauc method. Size of nanoparticles was increased after a week and their bandgap energy was decreased. Results show that the phase of TiO 2 nanoparticles was transited from brookite to rutile after 1 week.

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Influence of Silver Incorporation on the Structural and Electrical Properties of Diamond-Like Carbon Thin Films

Cited by 46 publications

References 33 publications

Atomic Scale Interface Manipulation, Structural Engineering, and Their Impact on Ultrathin Carbon Films in Controlling Wear, Friction, and Corrosion

Atomic Scale Interface Manipulation, Structural Engineering, and Their Impact on Ultrathin Carbon Films in Controlling Wear, Friction, and Corrosion

Probing the Role of an Atomically Thin SiNx Interlayer on the Structure of Ultrathin Carbon Films

Effect of aging on the properties of TiO2 nanoparticle

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