Raman spectroscopy investigation of magnesium oxide nanoparticles - Archive ouverte HAL
Article Dans Une Revue RSC Advances Année : 2023

Raman spectroscopy investigation of magnesium oxide nanoparticles

Résumé

We investigate Raman spectra (100 cm−1 to 3900 cm−1) of magnesium oxide nanoparticles with nominal sizes of 10 nm, 20 nm, 40 nm, 50 nm, and 300 nm. The crystal structure of MgO prohibits first-order modes and yet, there are numerous reports of relatively intense peaks throughout the literature. Raman signals at approximately 278 cm−1 and 445 cm−1 that were attributed to MgO nanoparticles by previous authors are shown to belong to layers of Mg(OH)2 formed on the surface of MgO nanoparticles. Through an annealing process at 400 °C in an O2 atmosphere, we observe that modes in the 3700 cm−1 spectral region, which are a signature of OH groups, disappear together with modes at 278 cm−1 and 445 cm−1, thus establishing a necessary criterion to associate all of these peaks to the presence of OH groups on the surface.

Dates et versions

hal-04649394 , version 1 (16-07-2024)

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Citer

Maria Dekermenjian, Andreas Peter Ruediger, Alexandre Merlen. Raman spectroscopy investigation of magnesium oxide nanoparticles. RSC Advances, 2023, 13 (38), pp.26683-26689. ⟨10.1039/D3RA04492K⟩. ⟨hal-04649394⟩

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