Article (Scientific journals)
Bottom-up, Robust Graphene Ribbon Electronics in All-Carbon Molecular Junctions.
Supur, Mustafa; Van Dyck, Colin; Bergren, Adam J et al.
2018In ACS Applied Materials and Interfaces, 10 (7), p. 6090-6095
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Keywords :
electron transport; graphene electronics; graphene ribbons; molecular electronics; molecular junction; 1 ,8-diaminonaphthalene; Electrochemical reductions; Electron delocalization; Electronic coupling; Molecular electronic junction; Materials Science (all); General Materials Science
Abstract :
[en] Large-area molecular electronic junctions consisting of 5-carbon wide graphene ribbons (GR) with lengths of 2-12 nm between carbon electrodes were fabricated by electrochemical reduction of diazotized 1,8-diaminonaphthalene. Their conductance greatly exceeds that observed for other molecular junctions of similar thicknesses, by a factor of >1 × 104 compared to polyphenylenes and >1 × 107 compared to alkane chains. The remarkable increase of conductance of the GR nanolayer results from (i) uninterrupted planarity of fused-arene structure affording extensive π-electron delocalization and (ii) enhanced electronic coupling of molecular layer with the carbon bottom contact by two-point covalent bonding, in agreement with DFT-based simulations.
Disciplines :
Chemistry
Author, co-author :
Supur, Mustafa ;  Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
Van Dyck, Colin  ;  Université de Mons - UMONS > Faculté des Sciences > Service Chimie Physique Théorique
Bergren, Adam J;  National Institute for Nanotechnology (NINT), National Research Council Canada , 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
McCreery, Richard L ;  Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada ; National Institute for Nanotechnology (NINT), National Research Council Canada , 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
Language :
English
Title :
Bottom-up, Robust Graphene Ribbon Electronics in All-Carbon Molecular Junctions.
Publication date :
21 February 2018
Journal title :
ACS Applied Materials and Interfaces
ISSN :
1944-8244
eISSN :
1944-8252
Publisher :
American Chemical Society, United States
Volume :
10
Issue :
7
Pages :
6090-6095
Peer reviewed :
Peer Reviewed verified by ORBi
Research institute :
Matériaux
Funders :
National Research Council Canada
University of Alberta
Natural Sciences and Engineering Research Council of Canada
Alberta Innovates - Technology Futures
Funding text :
This work was supported by the University of Alberta, the National Research Council of Canada, the National Sciences and Engineering Research Council, and Alberta Innovates. We acknowledge the computational resources of the Center for Nanoscale Materials (Argonne National Lab), an Office of Science user facility, supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract DE-AC02-06CH11357.
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