| People | Locations | Statistics |
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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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Vezin, Hervé
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Abnormal copper coordination obtained by a TiO2 overlayer as the key to enhance photocatalytic hydrogen generationcitations
- 2024Abnormal copper coordination obtained by a TiO2 overlayer as the key to enhance photocatalytic hydrogen generationcitations
- 2024Second-harmonic electron paramagnetic resonance spectroscopy and imaging reveal metallic lithium depositions in Li-ion batteriescitations
- 2023Influences of Metal Electrodes on Stability of Non‐Fullerene Acceptor‐Based Organic Photovoltaicscitations
- 2022Structural insights into Lewis acid- and F4TCNQ-doped conjugated polymers by solid-state magnetic resonance spectroscopycitations
- 2022How do zeolite-templated carbons grow?citations
- 2022Titanium in ground-granulated blast-furnace slag-like calcium-magnesium-aluminosilicate glasses: Its role in the glass network, dissolution at alkaline pH and surface layer formationcitations
- 2016Insertion of MoO3 in Borophosphate Glasses Investigated by Magnetic Resonance Spectroscopies ; Studium vlivu přídavku MoO3 na strukturu borofosforečnanových skel pomocí pokročilých metod NMRcitations
- 2014Isotopic and structural signature of experimentally irradiated organic mattercitations
- 2004Structural characterization of iron–alumino–silicate glassescitations
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article
Isotopic and structural signature of experimentally irradiated organic matter
Abstract
The effects of electron irradiation on the structure and the D/H signature of a synthetic analogue of extraterrestrialinsoluble organic matter (IOM) were studied. Polyethylene terephthalate (PET) was chosen because it contains both aliphaticand aromatic functional groups. A 900 nm-thick film was irradiated with electrons within the energy range 4–300 keV, fordifferent run durations. Temperature influence was also tested. Irradiated residues were structurally and isotopically characterizedby infrared spectroscopy (IR), electronic paramagnetic resonance (EPR), and Secondary Ion Mass Spectrometry(SIMS). With increasing energy deposition, spectroscopic results indicate (i) a gradual amorphization with chain scissions,(ii) an increase of CH2/CH3 and (iii) the formation of quinones. The EPR study shows that mono- and biradicals (organicspecies with one or several unpaired valence electrons) are also formed during irradiation. As these structural modificationsoccur, the dD (initially at 33& relative to SMOW) decreases first during a transient step and then stabilizes at +300&.There is a strong correlation between the changes recorded by the different methods and the electron dose. Deposited energyappears to be the key parameter to induce these modifications. In this respect a low-energy electron irradiation causes moredamages than high energy ones. Based on our data and considering the current solar electron flux, the irradiation at moderateenergy (1–10 keV) can produce significant D-enrichments of the IOM in a timescale compatible with the evolution of a typicalprotoplanetary disk