abstract

• We report a straightforward water-assisted chemical sintering to procedure a predominantly monoclinic (M) phase vanadium dioxide (VO2) powder-based substrate. This substrate was tested as a platform to enhance the Raman signal for the initial characterization of eicosane as an analyte. The Raman enhancement activity produced by VO2(M) powder was synthesized by reacting vanadium pentoxide (V2O5) with oxalic acid (H2C2O4) in a molar ratio of 1:5. The VO2 - 1:5 powder sample showed a lower crystallinity and higher solubility than the sample synthesized with a reduced concentration of oxalic acid. After signal magnification on the analyte-VO2 - 1:5 - H2O -substrate, the position and intensity of the observed Raman bands suggest an analyte-surface interaction through to the interplay of two enhancement mechanisms: charge transfer (chemical) and an electromagnetic (EM), possibly by oxygen vacancies. Furthermore, a possible route for an Enhancement Factor (EF) for eicosane on this surface type is discussed. The final data indicated that the proposed synthesis process is ideal for developing a surface with Raman enhancement activity, which is why it is suggested as a biomolecule detection platform.

authors

• Balderas Navarro Raúl Eduardo
• Ibarra-Becerra C.A.
• Reyes Reyes Marisol

publication date

• 2025-01-01

funding provided via

• Consejo Nacional de Humanidades, Ciencias y Tecnologías, Conahcyt, (701541, 722355, 725848, 206298)  Grant

published in

• Ceramics International  Journal

keywords

• A. powders: chemical preparation; A. Sintering; C. Optical properties; E. Substrates

Digital Object Identifier (DOI)

• 10.1016/j.ceramint.2025.01.183

PubMed ID

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