title: Revelation of graphene-Au for direct write deposition and characterization.
abstract: Graphene nanosheets were prepared using a modified Hummer's method, and Au-graphene nanocomposites were fabricated by in situ reduction of a gold salt. The as-produced graphene was characterized by X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy (HR-TEM). In particular, the HR-TEM demonstrated the layered crystallites of graphene with fringe spacing of about 0.32 nm in individual sheets and the ultrafine facetted structure of about 20 to 50 nm of Au particles in graphene composite. Scanning helium ion microscopy (HIM) technique was employed to demonstrate direct write deposition on graphene by lettering with gaps down to 7 nm within the chamber of the microscope. Bare graphene and graphene-gold nanocomposites were further characterized in terms of their composition and optical and electrical properties.
authors.affiliation: National Physical Laboratory, Council of Scientific and Industrial Research, Dr, K,S, Krishnan Road, New Delhi, 110 012, India. aks@nplindia.ernet.in.
authors.forename: Shweta
authors.initials: S
authors.lastname: Bhandari
authors.forename: Melepurath
authors.initials: M
authors.lastname: Deepa
authors.forename: Amish G
authors.initials: AG
authors.lastname: Joshi
authors.forename: Aditya P
authors.initials: AP
authors.lastname: Saxena
authors.forename: Avanish K
authors.initials: AK
authors.lastname: Srivastava