- Title
- Manipulating the orientation of an organic adsorbate on silicon: a NEXAFS study of acetophenone on Si(001)
- Creator
- O'Donnell, Kane M.; Warschkow, Oliver; Suleman, Asif; Fahy, Adam; Thomsen, Lars; Schofield, Steven R.
- Relation
- Engineering and Physical Sciences Research Council.EP/H003991/1
- Relation
- Journal of Physics: Condensed Matter Vol. 27, Issue 5, p. 1-9
- Publisher Link
- http://dx.doi.org/10.1088/0953-8984/27/5/054002
- Publisher
- Institute of Physics Publishing Ltd. (IOP)
- Resource Type
- journal article
- Date
- 2015
- Description
- We investigate the chemical and structural configuration of acetophenone on Si(0 0 1) using synchrotron radiation core-level spectroscopy techniques and density functional theory calculations. Samples were prepared by vapour phase dosing of clean Si(0 0 1) surfaces with acetophenone in ultrahigh vacuum. Near edge x-ray absorption fine structure spectroscopy and photoelectron spectroscopy measurements were made at room temperature as a function of coverage density and post-deposition anneal temperature. We show that the dominant room temperature adsorption structure lies flat on the substrate, while moderate thermal annealing induces the breaking of Si-C bonds between the phenyl ring and the surface resulting in the reorientation of the adsorbate into an upright configuration.
- Subject
- organic functionalization; Si(001); NEXAFS; photoelectron spectroscopy
- Identifier
- http://hdl.handle.net/1959.13/1319529
- Identifier
- uon:23892
- Identifier
- ISSN:0953-8984
- Language
- eng
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