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Title:Interface-controlled growth of organic semiconductors on graphene
Authors:ID Mathews, Jinta, UNG (Author)
ID Emin, Saim, UNG (Author)
ID Pavlica, Egon, UNG (Author)
ID Valant, Matjaž, UNG (Author)
ID Bratina, Gvido, UNG (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:We have studied submonolayer coverages of N,N-1H,1H-perfluorobutyl dicyanoperylenecarboxydiimide (PDIF-CN2) on mechanically exfoliated graphene transferred onto SiO2 substrates. Our atomic force microscopy (AFM) data show that PDIF-CN2 forms irregularly-shaped 1.4 nm-high islands. From the selected area diffraction performed with transmission electron microscope (TEM) we conclude that this height corresponds to π−π stacks of molecules, which are inclined for 43° relative to the graphene surface. AFM also showed complete absence of PDIF-CN2 on single-layer graphene (SLG). Electric force microscopy revealed a marked difference in surface charge density between a single-layer graphene and bilayer graphene, with a higher surface charge on SLG than on the bilayer graphene. We associate this behavior with p− type doping of graphene due to the electrostatic dipole induced by the molecular water layer present at the graphene/SiO2 interface. The crucial role of the graphene/SiO2 interface in determining growth of PDIF-CN2 was further confirmed by TEM examination of PDIF-CN2 deposited onto unsupported SLG.
Keywords:afm, organic semiconductors, graphene
Publication version:Version of Record
Year of publishing:2017
Number of pages:16
Numbering:0, 0
PID:20.500.12556/RUNG-3089-af6e5781-f85a-bb71-572d-afe42bca54c6 New window
COBISS.SI-ID:4780795 New window
DOI:10.1016/j.susc.2017.05.005 New window
NUK URN:URN:SI:UNG:REP:4QEVHK2P
Publication date in RUNG:18.05.2017
Views:5984
Downloads:0
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MATHEWS, Jinta, EMIN, Saim, PAVLICA, Egon, VALANT, Matjaž and BRATINA, Gvido, 2017, Interface-controlled growth of organic semiconductors on graphene. surface science [online]. 2017. Vol. 0, no. 0. [Accessed 26 March 2025]. DOI 10.1016/j.susc.2017.05.005. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=3089
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Record is a part of a journal

Title:surface science
Shortened title:surf.sci.
Publisher:elsevier
Year of publishing:2017

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0055

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:18.05.2017

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