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Detection of adsorb...
Detection of adsorbate overlayer structural transitions using sum-frequency generation spectroscopy
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- Gladh, Jörgen (författare)
- Stockholms universitet,Fysikum
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- Öberg, Henrik (författare)
- Stockholms universitet,Fysikum
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- Pettersson, Lars G. M. (författare)
- Stockholms universitet,Fysikum
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- Öström, Henrik (författare)
- Stockholms universitet,Fysikum
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(creator_code:org_t)
- Elsevier BV, 2015
- 2015
- Engelska.
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Ingår i: Surface Science. - : Elsevier BV. - 0039-6028 .- 1879-2758. ; 633, s. 77-81
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We demonstrate that temperature-programmed vibrational sum-frequency generation (SFG) spectroscopy has a unique sensitivity to certain adsorbate overlayer structural transitions. In the CO stretching vibration of co-adsorbed CO/O(2x1)/Ru(0001) we observe pronounced dips in the spectral intensity as the adsorbate overlayer undergoes structural transitions with temperature. Combining with temperature-programmed desorption (TPD) a more complete picture of temperature-dependent structural transitions is obtained. We extract kinetic parameters from the SFG data and obtain good agreement with TPD when both techniques see the same transition. Infrared-infrared visible SFG is used to determine changes in inter-adsorbate coupling that allow us to experimentally assign the structural transitions. Furthermore, density functional theory calculations of the proposed structures and energetics are performed to verify the experimental assignments.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Vibrational spectroscopy
- Sum-frequency generation
- Surface science
- Density functional theory calculations
- kemisk fysik
- Chemical Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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