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Exploring the Tilt-...
Exploring the Tilt-Angle Dependence of Electron Tunneling across Molecular Junctions of Self-Assembled Alkanethiols
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Frederiksen, Thomas (author)
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Munuera, C (author)
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Ocal, C (author)
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Brandbyge, Mads (author)
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- Paulsson, Magnus (author)
- Högskolan i Kalmar,Naturvetenskapliga institutionen
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Sanches-Portal, D (author)
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Arnau, A (author)
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(creator_code:org_t)
- 2009-07-28
- 2009
- English.
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In: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 3:8, s. 2073-2080
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Electronic transport mechanisms in molecular junctions are investigated by a combination of first-principles calculations and current-voltage measurements of several well-characterized structures. We study self-assembled layers of alkanethiols grown on Au(111) and form tunnel junctions by contacting the molecular layers with the tip of a conductive force microscope. Measurements done under low-load conditions permit us to obtain reliable tilt-angle and molecular length dependencies of the low-bias conductance through the alkanethiol layers. The observed dependence on tilt-angle is stronger for the longer molecular chains. Our calculations confirm the observed trends and explain them as a result of two mechanisms, namely, a previously proposed intermolecular tunneling enhancement as well as a hitherto overlooked tilt-dependent molecular gate effect.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Fysik
- Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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