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Paramagnetic behaviour of silver nanoparticles generated by decomposition of silver oxalate

Le Trong, Hoa and Kiryukhina, Kateryna and Gougeon, Michel and Baco-Carles, Valérie and Courtade, Frédéric and Dareys, Sophie and Tailhades, Philippe Paramagnetic behaviour of silver nanoparticles generated by decomposition of silver oxalate. (2017) Solid State Sciences, 69. 44-49. ISSN 1293-2558

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.solidstatesciences.2017.05.009


Silver oxalate Ag2C2O4, was already proposed for soldering applications, due to the formation when it is decomposed by a heat treatment, of highly sinterable silver nanoparticles. When slowly decomposed at low temperature (125 °C), the oxalate leads however to silver nanoparticles isolated from each other. As soon as these nanoparticles are formed, the magnetic susceptibility at room temperature increases from -3.14 10-7 emu.Oe-1.g-1 (silver oxalate) up to -1.92 10-7 emu.Oe-1.g-1 (metallic silver). At the end of the oxalate decomposition, the conventional diamagnetic behaviour of bulk silver, is observed from room temperature to 80 K. A diamagnetic-paramagnetic transition is however revealed below 80 K leading at 2 K, to silver nanoparticles with a positive magnetic susceptibility. This original behaviour, compared to the one of bulk silver, can be ascribed to the nanometric size of the metallic particles.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at https://www.sciencedirect.com/science/article/pii/S1293255816308391
HAL Id:hal-01750400
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Vietnam National University - VNU (VIETNAM)
Laboratory name:
Deposited On:29 Mar 2018 10:44

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