Sub-THz Vibrational Dynamics in Ordered Mesoporous Silica Nanoparticles

The vibrational dynamics in the sub-THz range of mesoporous silica nanoparticles (MSNs) having ordered cylindrical mesopores was investigated. MCM-41 and SBA-15 particles were synthesized, and their structure was determined using scanning electron microscopy (SEM), low-angle X-ray diffraction (XRD),...

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Detalles Bibliográficos
Autores principales: Hernando Abad, Eduardo, Bouyer, Frédéric, Chaabane, Laroussi, Zerrouki, Alan, Margueritat, Jérémie, Saviot, Lucien
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10384747/
https://www.ncbi.nlm.nih.gov/pubmed/37513089
http://dx.doi.org/10.3390/nano13142078
Descripción
Sumario:The vibrational dynamics in the sub-THz range of mesoporous silica nanoparticles (MSNs) having ordered cylindrical mesopores was investigated. MCM-41 and SBA-15 particles were synthesized, and their structure was determined using scanning electron microscopy (SEM), low-angle X-ray diffraction (XRD), N(2) physisorption analyses, and Raman scattering. Brillouin scattering measurements are reported and enabled determining the stiffness of the silica walls (speed of sound) using finite element calculations for the ordered mesoporous structure. The relevance of this approach is discussed based on the comparison between the numerical and experimental results and previous works reported in the literature.

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