title: Current rectification in a Langmuir-Schaefer monolayer of fullerene-bis-[4-diphenylamino-4' '-(n-ethyl-n-2' ''-ethyl)amino-1,4-diphenyl-1,3-butadiene] malonate between Au electrodes.
abstract: Langmuir-Schaefer (LS) monolayer films of fullerene-bis-[4-diphenylamino-4' '-(N-ethyl-N-2' ''-ethyl)amino-1,4-diphenyl-1,3-butadiene] malonate, 1, sandwiched between two Au electrodes, exhibit pronounced current asymmetries (rectification) between positive and negative bias at room temperature, with no decay of the rectification after several cycles. The device shows symmetrical through-space tunneling for a bias up to +/-3 V, and asymmetrical, unimolecular, "U" type rectifier behavior in the voltage range from +/-3.0 to +/-5.4 V, with rectification ratios up to 16.5. The rectification is ascribed to the asymmetric placement of the relevant molecular orbitals, with respect to the metallic electrodes.
authors.affiliation: Laboratory for Molecular Electronics, Chemistry Department, University of Alabama, Tuscaloosa, Alabama 35487-0336, USA.
authors.forename: Andrei
authors.initials: A
authors.lastname: Honciuc
authors.forename: Archana
authors.initials: A
authors.lastname: Jaiswal
authors.forename: Aijun
authors.initials: A
authors.lastname: Gong
authors.forename: Kimba
authors.initials: K
authors.lastname: Ashworth
authors.forename: Charles W
authors.initials: CW
authors.lastname: Spangler
authors.forename: Ian R
authors.initials: IR
authors.lastname: Peterson
authors.forename: Larry R
authors.initials: LR
authors.lastname: Dalton
authors.forename: Robert M
authors.initials: RM
authors.lastname: Metzger
mesh_terms: D000388:Air; D004159:Diphenylamine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D004563:Electrochemistry; D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008567:Membranes, Artificial; D008956:Models, Chemical; D015394:Molecular Structure; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D037741:Fullerenes; D008567:Membranes, Artificial; C521422:fullerene-bis(4-diphenylamino-4''-(N-ethyl-N-2'''-ethyl)amino-1,4-diphenyl-1,3-butadiene)malonate; D014867:Water; D006046:Gold; D004159:Diphenylamine