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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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| Kononenko, Denys |
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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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| Muller, Hermance |
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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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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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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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Wu, Qiang
Northumbria University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Surface and bulk ferroelectric phase transition in super-tetragonal BiFeO 3 thin filmscitations
- 2021Low-energy electron control over physical and chemical properties of organic aromatic thin layers at the micrometre scale
- 2020Integrating radio-over-fiber communication system and BOTDR sensor systemcitations
- 2018A comprehensive experimental study of whispering gallery modes in a cylindrical microresonator excited by a tilted fiber tapercitations
- 2017Strain-induced spectral tuning of the whispering gallery modes in a cylindrical micro-resonator formed by a polymer optical fibercitations
- 2012Chalcogenide microsphere fabricated from fiber tapers using contact with a high-temperature ceramic surfacecitations
- 2011Lead silicate glass microsphere resonators with absorption-limited Qcitations
- 2008Hermetic joining of micro-devices using a glass frit intermediate layer and a scanning laser beamcitations
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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.