title: Controlled electrochemical growth of ultra-long gold nanoribbons.
abstract: This paper describes the electrochemical growth of branchless gold nanoribbons with ∼40 nm × ∼300 nm cross sections and >100μm lengths (giving length-to-thickness aspect ratios of >103). These structures are useful for opto-electronic studies and as nanoscale electrodes. The 0.75-1.0 V voltage amplitude range is optimal for branchless ribbon growth. Reduced amplitudes induce no growth, possibly due to reversible redox chemistry of gold at reduced amplitudes, whereas elevated amplitudes, or excess electrical noise, induce significant side-branching. The inter-relatedness of voltage-amplitude, noise, and side-branching in electrochemical nanoribbon growth is demonstrated.
authors.affiliation: Department of Physics, Kansas State University , Manhattan, Kansas 66506, USA.
authors.forename: Gobind
authors.initials: G
authors.lastname: Basnet
authors.affiliation: Department of Physics, Kansas State University , Manhattan, Kansas 66506, USA.
authors.forename: Krishna R
authors.initials: KR
authors.lastname: Panta
authors.affiliation: Imaging and Analytical Microscopy Laboratory, University of Kansas , Lawrence, Kansas 66045, USA.
authors.forename: Prem S
authors.initials: PS
authors.lastname: Thapa
authors.affiliation: Department of Physics, Kansas State University , Manhattan, Kansas 66506, USA.
authors.forename: Bret N
authors.initials: BN
authors.lastname: Flanders