DataVXACS NanoPaper
journal article·2016-02-23Open access

Sequential Electron Transport and Vibrational Excitations in an Organic Molecule Coupled to Few-Layer Graphene Electrodes

Enrique Burzurí, Joshua O. Island, Raúl Díaz-Torres, Alexandra Fursina, Arántzazu González-Campo, Olivier Roubeau, Simon J. Teat, Núria Aliaga-Alcalde, Eliseo Ruiz, Herre S. J. van der Zant

ACS Nano· Volume 10· Issue 2
Publisher pageOpen full text
Source abstract

Abstract

Graphene electrodes are promising candidates to improve reproducibility and stability in molecular electronics through new electrode-molecule anchoring strategies. Here we report sequential electron transport in few-layer graphene transistors containing individual curcuminoid-based molecules anchored to the electrodes via π-π orbital bonding. We show the coexistence of inelastic co-tunneling excitations with single-electron transport physics due to an intermediate molecule-electrode coupling; we argue that an intermediate electron-phonon coupling is the origin of these vibrational-assisted excitations. These experimental observations are complemented with density functional theory calculations to model electron transport and the interaction between electrons and vibrational modes of the curcuminoid molecule. We find that the calculated vibrational modes of the molecule are in agreement with the experimentally observed excitations.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Molecular Junctions and Nanostructures · Organic Electronics and Photovoltaics · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands

CSIC-ICMAB (Institut de Ciència dels Materials de Barcelona), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain

Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC, and Universidad de Zaragoza, Plaza San Francisco s/n, 50009 Zaragoza, Spain

Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States

ICREA (Institució Catalana de Recerca i Estudis Avançats), Passeig Lluís Companys 23, 08010 Barcelona, Spain

Funding

European Research Council · Basic Energy Sciences · Stichting voor Fundamenteel Onderzoek der Materie · Ministerio de Ciencia e Innovación · Generalitat de Catalunya · Ministerie van Onderwijs, Cultuur en Wetenschap · Seventh Framework Programme · Nederlandse Organisatie voor Wetenschappelijk Onderzoek

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