title: Single electron tunneling in large scale nanojunction arrays with bisferrocene-nanoparticle hybrids.
abstract: We report on the fabrication and single electron tunneling behaviour of large scale arrays of nanogap electrodes bridged by bisferrocene-gold nanoparticle hybrids (BFc-AuNP). Coulomb staircase was observed in the low temperature current-voltage curves measured on the junctions with asymmetric tunnel barriers. On the other hand, junctions with symmetric tunneling barrier exhibited mere nonlinear current voltage characteristics without discrete staircase. The experimental results agreed well with simulations based on the orthodox theory. The junction resistance showed thermally activated conduction behaviour at higher temperature. The overall voltage and temperature dependent results show that the transport behaviour of the large arrays of single particle devices obtained by a facile optical lithography and chemical etching process corresponds with the behaviour of single particle devices fabricated by other techniques like e-beam lithography and mechanical breaking methods.
authors.affiliation: National Nanotechnology Laboratory, Istituto Nanoscienze-CNR, Via Arnesano, I-73100 Lecce, Italy. shilpi.karmakar@nano.cnr.it
authors.forename: Shilpi
authors.initials: S
authors.lastname: Karmakar
authors.forename: Susmit
authors.initials: S
authors.lastname: Kumar
authors.forename: Pasquale
authors.initials: P
authors.lastname: Marzo
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Primiceri
authors.forename: Riccardo
authors.initials: R
authors.lastname: Di Corato
authors.forename: Ross
authors.initials: R
authors.lastname: Rinaldi
authors.forename: Pier Giorgio
authors.initials: PG
authors.lastname: Cozzi
authors.forename: Alessandro Paolo
authors.initials: AP
authors.lastname: Bramanti
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Maruccio
mesh_terms: D003198:Computer Simulation; D004583:Electrons; D004867:Equipment Design; D005296:Ferrous Compounds / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D000075163:Metallocenes; D046228:Microarray Analysis / Q000295:instrumentation*; D016252:Microscopy, Scanning Tunneling; D055616:Microtechnology; D008954:Models, Biological; D008958:Models, Molecular; D053761:Nanocomposites / Q000737:chemistry
chemical_list: D005296:Ferrous Compounds; D000075163:Metallocenes; D006046:Gold; C004998:ferrocene