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Drastic performance enhancement of photoluminescence and water electrolysis by local-magnetic-field-assisted LSPR of Ag NPs and NCs.
- Source :
-
Colloids & Surfaces A: Physicochemical & Engineering Aspects . May2023, Vol. 665, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- A novel method is presented for drastically improving the local surface plasma resonance (LSPR) effect of noble metal nanoparticles (NPs) and nanoclusters (NCs). This is realized by magnetizing particles comprising a ferrimagnetic core and a noble metal nanoshell. In this study, we prepared Fe 3 O 4 @SiO 2 @Ag composite particles. Ag NPs and NCs had the size of 10–15 nm and 2–3 nm, respectively. The photoluminescence (PL) intensities of ZnO and YAG:Ce substrates coated with the magnetic composite particles increased by 160 % and 50 %, respectively, after magnetization under a magnetic field of 18 mT compared to the unmagnetized state. The activity of Ni-foam-based-Fe 3 O 4 @SiO 2 @Ag working electrode for water electrolysis was also significantly improved after magnetization. The increasing rate of current density after magnetization was 226 mA∙cm−2/0.1 V, which is higher than 158 mA∙cm−2/0.1 V before the magnetization. The mechanism for drastic performance enhancement of PL and water electrolysis postulates that after magnetization, the remanence of the ferrimagnetic Fe 3 O 4 core provides a local magnetic field to strengthen the local electric field in the confined area of Ag NPs/NCs. It was confirmed by the higher intensity of peaks in Raman spectroscopy and contributed to the enhancement of LSPR effect. This efficient and practical approach to magnetization-induced LSPR improvement has potential application prospects in LSPR-related fields. [Display omitted] • A novel approach to magnetization-induced drastic LSPR improvement is proposed. • After magnetization under 18 mT, PL intensities of Fe 3 O 4 @SiO 2 @Ag-coated ZnO and YAG:Ce were elevated to 2.6- and 1.5-fold. • After magnetization, water electrolysis efficiency of Fe 3 O 4 @SiO 2 @Ag was significantly improved by the local magnetic field. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09277757
- Volume :
- 665
- Database :
- Academic Search Index
- Journal :
- Colloids & Surfaces A: Physicochemical & Engineering Aspects
- Publication Type :
- Academic Journal
- Accession number :
- 162680383
- Full Text :
- https://doi.org/10.1016/j.colsurfa.2023.131215