title: Structure of [C4mpyr][NTf2] room-temperature ionic liquid at charged gold interfaces.
abstract: The structure of 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C(4)mpyr][NTf(2)]) room-temperature ionic liquid at an electrified gold interface was studied using neutron reflectometry, cyclic voltammetry, and differential capacitance measurements. Subtle differences were observed between the reflectivity data collected on a gold electrode at three different applied potentials. Detailed analysis of the fitted reflectivity data reveals an excess of [C(4)mpyr](+) at the interface, with the amount decreasing at increasingly positive potentials. A cation rich interface was found even at a positively charged electrode, which indicates a nonelectrostatic (specific) adsorption of [C(4)mpyr](+) onto the gold electrode.
authors.affiliation: CSIRO Process Science and Engineering, Bayview Avenue, Clayton South, Victoria 3169, Australia.
authors.forename: Yansen
authors.initials: Y
authors.lastname: Lauw
authors.forename: Michael D
authors.initials: MD
authors.lastname: Horne
authors.forename: Theo
authors.initials: T
authors.lastname: Rodopoulos
authors.forename: Vera
authors.initials: V
authors.lastname: Lockett
authors.forename: Bulent
authors.initials: B
authors.lastname: Akgun
authors.forename: William A
authors.initials: WA
authors.lastname: Hamilton
authors.forename: Andrew R J
authors.initials: AR
authors.lastname: Nelson