SPR studies in PVA composite films of SiO2@NaYF4:Er3+/Yb3+ UCNPs via AuNPs concentration variation and their temperature sensing applications

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Kumar, A (Author) Other; Joaquim C G E Esteves da Silva (Author) FCUP; Tiwari, SK (Author) Other

Journal

Title: Journal of Alloys and Compounds

Vol. 967

ISSN: 0925-8388

Publisher: Elsevier

Indexing

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Other information

Authenticus ID: P-00Y-X9M

DOI: 10.1016/j.jallcom.2023.171704

Abstract (EN): The composite film of mesoporous silica coated NaYF4:Er3+/Yb3+ upconversion nanoparticles and gold nanoparticles (AuNPs) in Poly vinyl alcohol (PVA) medium were prepared. The effect of the concentrations of AuNPs with 0 mu l, 50 mu l, 100 mu l and 150 mu l on the structure and upconversion luminescence intensity were studied. The phenomenon of enhancement in upconversion luminescence intensity due to AuNPs were explained via surface plasmon resonance (SPR) phenomenon. Apart from this the XRD, FE-SEM and AFM studies were done for estimation of structure and surface morphology etc. The impurities were estimated through FTIR analysis. The optical properties of these polymer composite films were studied via UV-vis absorption spectra and upconversion luminescence spectra analysis. A low temperature sensing ability of these films have been demonstrated for the suitability of these films in bio-medical applications.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10