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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lafosse, Anne
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Publications (4/4 displayed)
- 2021Low-energy electron control over physical and chemical properties of organic aromatic thin layers at the micrometre scale
- 2018Response under low-energy electron irradiation of a thin film of a potential copper precursor for focused electron beam induced deposition (FEBID)citations
- 2015DOS and electron attachment effects in the electron-induced vibrational excitation of terphenylthiol SAMscitations
- 2014Low-energy electron induced resonant loss of aromaticity: consequences on cross-linking in terphenylthiol SAMscitations
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document
Low-energy electron control over physical and chemical properties of organic aromatic thin layers at the micrometre scale
Abstract
The collimated monochromatic low-energy (≤ 50 eV) electron beam delivered by a low energy electron microscope (LEEM) was used to locally modify organic molecular thin films at the micrometre-scale. Self-Assembled Monolayers (SAMs) of p-terphenylthiol (TPT) anchored on gold substrates were used as model organic layers. The local work function (WF) was observed to decrease as a consequence of electron irradiation and to be tuneable using the irradiation energy and/or the dose as control parameters. The chemical origin of the observed WF changes could be discussed in the light of available vibrational analyses of irradiated TPT SAMs performed using High-Resolution Electron Energy Loss Spectroscopy (HREELS) and by comparing the effective cross sections estimated for WF modulation and for chemical modifications, respectively. The hydrogen content of the organic thin film was shown to be the determining parameter, rather than the degree of aromaticity of the hydrogenated carbon centres. Finally, the imprinted modifications were observed to have a moderate stability after air exposure by combining Photoemission Electron Microscopy (PEEM) and HREELS.