Nanoelectrical analysis of single molecules and atomic-scale materials at the solid/liquid interface



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Nirmalraj, Peter and Thompson, Damien and Molina Ontoria, Agustín and Sousa, Marilyne and Martín, Nazario and Gotsmann, Bernd and Riel, Heike (2014) Nanoelectrical analysis of single molecules and atomic-scale materials at the solid/liquid interface. Nature Materials, 13 . pp. 947-953. ISSN 1476-1122, EISSN: 1476-4660

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Evaluating the built-in functionality of nanomaterials under practical conditions is central for their proposed integration as active components in next-generation electronics. Low-dimensional materials from single atoms to molecules have been consistently resolved and manipulated under ultrahigh vacuum at low temperatures. At room temperature, atomic-scale imaging has also been performed by probing materials at the solid/liquid interface. We exploit this electrical interface to develop a robust electronic decoupling platform that provides precise information on molecular energy levels recorded using in situ scanning tunnelling microscopy/spectroscopy with high spatial and energy resolution in a high-density liquid environment. Our experimental findings, supported by ab initio electronic structure calculations and atomic-scale molecular dynamics simulations, reveal direct mapping of single-molecule structure and resonance states at the solid/liquid interface.We further extend this approach to resolve the electronic structure of graphene monolayers at atomic length scales under standard room-temperature operating conditions.

Item Type:Article
Uncontrolled Keywords:Atoms; Calculations; Electronic structure; Graphene; Interfaces (materials); Molecular dynamics; Molecules; Scanning tunneling microscopy; Vacuum applications
Subjects:Sciences > Chemistry > Chemistry, Organic
ID Code:36418
Deposited On:15 Mar 2016 12:42
Last Modified:18 Mar 2016 12:04

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