title: New Insights into Single-Molecule Junctions Using a Robust, Unsupervised Approach to Data Collection and Analysis.
abstract: We have applied a new, robust and unsupervised approach to data collection, sorting and analysis that provides fresh insights into the nature of single-molecule junctions. Automation of tunneling current-distance (I(s)) spectroscopy facilitates the collection of very large data sets (up to 100,000 traces for a single experiment), enabling comprehensive statistical interrogations with respect to underlying tunneling characteristics, noise and junction formation probability (JFP). We frequently observe unusual low-to-high through-molecule conductance features with increasing electrode separation, in addition to numerous other "plateau" shapes, which may be related to changes in interfacial or molecular bridge structure. Furthermore, for the first time we use the JFP to characterize the homogeneity of functionalized surfaces at the nanoscale.
authors.affiliation: †Department of Chemistry, Imperial College London, London SW7 2AZ, U.K.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Inkpen
authors.affiliation: †Department of Chemistry, Imperial College London, London SW7 2AZ, U.K.
authors.forename: Mario
authors.initials: M
authors.lastname: Lemmer
authors.affiliation: †Department of Chemistry, Imperial College London, London SW7 2AZ, U.K.
authors.forename: Nathan
authors.initials: N
authors.lastname: Fitzpatrick
authors.affiliation: ‡Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
authors.forename: David C
authors.initials: DC
authors.lastname: Milan
authors.affiliation: ‡Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Nichols
authors.affiliation: †Department of Chemistry, Imperial College London, London SW7 2AZ, U.K.
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Long
authors.affiliation: †Department of Chemistry, Imperial College London, London SW7 2AZ, U.K.
authors.forename: Tim
authors.initials: T
authors.lastname: Albrecht