Article (Scientific journals)
Theoretical Comparison of a Longitudinal versus a Transverse Transport Path through Diarylethene Molecular Switches
Arbouch, Imane; Cornil, Jérôme; Van Dyck, Colin
2022In Journal of Physical Chemistry. C, Nanomaterials and interfaces, 126 (12), p. 5675 - 5681
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Keywords :
Bond-breaking; Crucial parameters; Decouplings; DFT method; Diarylethenes; Light activated switches; Molecular junction; Molecular switches; Performance; Trade off; Electronic, Optical and Magnetic Materials; Energy (all); Physical and Theoretical Chemistry; Surfaces, Coatings and Films; General Energy
Abstract :
[en] Diarylethene molecules are regularly used in molecular junctions as light-activated switches. Two crucial parameters drive the performance of these switches: (i) ON-OFF ratios and (ii) reversibility. In this work, we first show using the theoretical NEGF-DFT method that an efficient decoupling between the molecular backbone and the electrodes, which is necessary for reversibility, unfortunately, tends to weaken the ON-OFF ratio. We then show that this trade-off situation can be avoided by considering an alternative "transverse" contact configuration of the diarylethene, which exploits the bond breaking associated with the isomerization reaction. Interestingly, this transverse contact ensures both high on-off ratios (at least by 2 orders of magnitude) and an efficient decoupling of the active unit from the gold electrodes.
Disciplines :
Chemistry
Author, co-author :
Arbouch, Imane ;  Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des matériaux nouveaux
Cornil, Jérôme ;  Service de Chimie des Matériaux Nouveaux, Department of Chemistry, University of Mons, Mons, Belgium
Van Dyck, Colin  ;  Université de Mons - UMONS > Faculté des Sciences > Service Chimie Physique Théorique
Language :
English
Title :
Theoretical Comparison of a Longitudinal versus a Transverse Transport Path through Diarylethene Molecular Switches
Publication date :
31 March 2022
Journal title :
Journal of Physical Chemistry. C, Nanomaterials and interfaces
ISSN :
1932-7447
eISSN :
1932-7455
Publisher :
American Chemical Society
Volume :
126
Issue :
12
Pages :
5675 - 5681
Peer reviewed :
Peer Reviewed verified by ORBi
Research institute :
Matériaux
Funders :
Fonds De La Recherche Scientifique - FNRS
Funding text :
C.V.D. gratefully acknowledges the computational support obtained from the Center for Nanoscale Materials (CNM at 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 No. DE-AC02-06CH11357. The work of I.A. is supported by the Belgian National Fund for Scientific Research (F.R.S.-FNRS), thanks to the project SPINFUN (Convention T.0054.20). The authors also acknowledge the Consortium des Équipements de Calcul Intensif (CéCI) funded by the Belgian National Fund for Scientific Research (F.R.S.-FNRS) for providing the computational resources. J.C. is an FNRS research director.
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