Navigation überspringen
Universitätsbibliothek Heidelberg
Status: Bibliographieeintrag

Verfügbarkeit
Standort: ---
Exemplare: ---
heiBIB
 Online-Ressource
Verfasst von:Yildirim, Can [VerfasserIn]   i
 Sauter, Eric [VerfasserIn]   i
 Zharnikov, Michael [VerfasserIn]   i
Titel:Effect of electron irradiation on electric transport properties of aromatic self-assembled monolayers
Verf.angabe:Can Yildirim, Eric Sauter, Andreas Terfort, and Michael Zharnikov
Umfang:10 S.
Fussnoten:Publication Date (Web): March 16, 2017 ; Gesehen am 03.07.2018
Titel Quelle:Enthalten in: The journal of physical chemistry <Washington, DC> / C
Jahr Quelle:2017
Band/Heft Quelle:121(2017), 13, S. 7355-7364
ISSN Quelle:1932-7455
Abstract:We studied the effect of electron irradiation on electric transport properties of aromatic thiolate self-assembled monolayers (SAMs) with oligophenyl (OPh), acene, and oligo(phenylene ethynylene) (OPE) backbones of variable length. The resistance of these SAMs was found to increase progressively, by 2-3 orders of magnitude upon irradiation with doses up to 40 mC/cm2. The electric transport properties of the irradiated SAMs could be well described by the simplified Simmons’ equation, with the attenuation factor (β) and contact resistance (R0) as parameters. The β value decreased moderately for the OPh and OPE films but increased slightly for the acene monolayers upon irradiation. The R0 value increased significantly upon irradiation for all three types of SAMs and was considered as the major reason for the observed increase in the total resistance of these films. In its turn, the increase in R0 was attributed to the combined effect of a partly deteriorated anchoring to thesubstrate at the SAM-substrate interface and progressive irradiation-promoted adsorption of airborne molecules at the SAM-ambient interface. The effect of the work function, studied in the given context as well and exhibiting a small change only upon irradiation, is believed to be of negligible influence on R0. Finally, for the three-ring systems, the transition voltage (Vtrans) could be monitored. It showed progressive decrease upon irradiation for all three kinds of aromatic backbones. This behavior was considered as a fingerprint for the decrease in the width of the HOMO-LUMO gap upon irradiation, which can be potentially useful for bandgap engineering.
DOI:doi:10.1021/acs.jpcc.7b01243
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Verlag: http://dx.doi.org/10.1021/acs.jpcc.7b01243
 Verlag: https://doi.org/10.1021/acs.jpcc.7b01243
 DOI: https://doi.org/10.1021/acs.jpcc.7b01243
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1577221664
Verknüpfungen:→ Zeitschrift

Permanenter Link auf diesen Titel (bookmarkfähig):  https://katalog.ub.uni-heidelberg.de/titel/68280119   QR-Code
zum Seitenanfang