NDLI: Ultrathin Carbon with Interspersed Graphene/Fullerene-like Nanostructures: A DurableProtective Overcoat for High Density Magnetic Storage

Content Provider	PubMed Central
Author	Dwivedi, Neeraj Satyanarayana, Nalam Yeo, Reuben J. Hai, Xu Loh, Kian Ping Tripathy, Sudhiranjan Bhatia, Charanjit S.
Copyright Year	2015
Abstract	One of the key issues for future hard disk drive technology is to design and developultrathin (<2 nm) overcoats with excellent wear- and corrosionprotection and high thermal stability. Forming carbon overcoats (COCs) havinginterspersed nanostructures by the filtered cathodic vacuum arc (FCVA) process canbe an effective approach to achieve the desired target. In this work, by employing anovel bi-level surface modification approach using FCVA, the formation of a highsp3 bonded ultrathin (~1.7 nm) amorphouscarbon overcoat with interspersed graphene/fullerene-like nanostructures, grown onmagnetic hard disk media, is reported. The in-depth spectroscopic and microscopicanalyses by high resolution transmission electron microscopy, scanning tunnelingmicroscopy, time-of-flight secondary ion mass spectrometry, and Raman spectroscopysupport the observed findings. Despite a reduction of ~37 % in COCthickness, the FCVA-processed thinner COC (~1.7 nm) showspromising functional performance in terms of lower coefficient of friction(~0.25), higher wear resistance, lower surface energy, excellenthydrophobicity and similar/better oxidation corrosion resistance than currentcommercial COCs of thickness ~2.7 nm. The surface andtribological properties of FCVA-deposited COC was further improved after depositionof lubricant layer.
Related Links	http://dx.doi.org/10.1038/srep11607
Starting Page	11607
File Format	PDF
ISSN	20452322
e-ISSN	20452322
Journal	Scientific Reports
Volume Number	5
Language	English
Publisher	Nature Publishing Group
Publisher Date	2015-06-25
Access Restriction	Open
Rights Holder	Nature Publishing Group
Subject Keyword	Science and technology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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