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From Graphene Nanor...
From Graphene Nanoribbons on Cu(111) to Nanographene on Cu(110) : Critical Role of Substrate Structure in the Bottom-Up Fabrication Strategy
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- Simonov, Konstantin A. (författare)
- Lund University,Lunds universitet,Uppsala universitet,Molekyl- och kondenserade materiens fysik,MAX IV, Lund University, Box 118, 22100 Lund, Sweden,MAX IV-laboratoriet,MAX IV Laboratory
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- Vinogradov, Nikolay A. (författare)
- Lund University,Lunds universitet,Uppsala universitet,Molekyl- och kondenserade materiens fysik,MAX IV, Lund University, Box 118, 22100 Lund, Sweden,MAX IV-laboratoriet,MAX IV Laboratory
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- Vinogradov, Alexander S. (författare)
- St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198504, Russia.
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- Generalov, Alexander (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,MAX IV, Lund University, Box 118, 22100 Lund, Sweden
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- Zagrebina, Elena M. (författare)
- V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia
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- Svirskiy, Gleb I. (författare)
- V.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia
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- Cafolla, Attilio A. (författare)
- School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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- Carpy, Thomas (författare)
- School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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- Cunniffe, John P. (författare)
- School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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- Taketsugu, Tetsuya (författare)
- Hokkaido University, Faculty of Science, Deptaprtment of Chemistry, Sapporo, Hokkaido 0600810, Japan
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- Lyalin, Andrey (författare)
- Global Research Center for Environmental & Energy Based Nanomaterials Science, Tsukuba, Ibaraki 3050044, Japan.
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- Mårtensson, Nils (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Preobrajenski, Alexei (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,MAX IV, Lund University, Box 118, 22100 Lund, Sweden
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(creator_code:org_t)
- 2015-08-26
- 2015
- Engelska.
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Ingår i: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 9:9, s. 8997-9011
- Relaterad länk:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Bottom-up strategies can be effectively implemented for the fabrication of atomically precise graphene nanoribbons. Recently, using 10,10'-dibromo-9,9'-bianthracene (DBBA) as a molecular precursor to grow armchair nanoribbons on Au(111) and Cu(111), we have shown that substrate activity considerably affects the dynamics of ribbon formation, nonetheless without significant modifications in the growth mechanism. In this paper we compare the on-surface reaction pathways for DBBA molecules on Cu(111) and Cu(110). Evolution of both systems has been studied via a combination of core-level X-ray spectroscopies, scanning tunneling microscopy, and theoretical calculations. Experimental and theoretical results reveal a significant increase in reactivity for the open and anisotropic Cu(110) surface in comparison with the close-packed Cu(111). This increased reactivity results in a predominance of the molecular substrate interaction over the intermolecular one, which has a critical impact on the transformations of DBBA on Cu(110). Unlike DBBA on Cu(111), the Ullmann coupling cannot be realized for DBBA/Cu(110) and the growth of nanoribbons via this mechanism is blocked. Instead, annealing of DBBA on Cu(110) at 250 degrees C results in the formation of a new structure: quasi-zero-dimensional flat nanographenes. Each nanographene unit has dehydrogenated zigzag edges bonded to the underlying Cu rows and oriented with the hydrogen-terminated armchair edge parallel to the [1-10] direction. Strong bonding of nanographene to the substrate manifests itself in a high adsorption energy of -12.7 eV and significant charge transfer of 3.46e from the copper surface. Nanographene units coordinated with bromine adatoms are able to arrange in highly regular arrays potentially suitable for nanotemplating.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology -- Nano-technology (hsv//eng)
Nyckelord
- graphene nanoribbons
- nanographene
- Ullmann reaction
- photoemission
- X-ray absorption
- STM
- DFT
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Simonov, Konstan ...
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Vinogradov, Niko ...
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Vinogradov, Alex ...
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Generalov, Alexa ...
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Zagrebina, Elena ...
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Svirskiy, Gleb I ...
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Cafolla, Attilio ...
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Carpy, Thomas
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Cunniffe, John P ...
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Taketsugu, Tetsu ...
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Lyalin, Andrey
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Mårtensson, Nils
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Preobrajenski, A ...
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