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Title: | Microstructures, absorption spectra, and magnetic properties of Core-shell Fe3O4@Ag nanoparticles for enhancing sensitivity of Surface Plasmon Resonance (SPR) sensor |
Authors: | Juharni Ilyas Maulana, Yahya Edi, Suharyadi Takeshi, Kato Satoshi, Iwata esuharyadi@ugm.ac.id |
Issue Date: | Jul-2021 |
Publisher: | Universiti Malaysia Perlis (UniMAP) |
Citation: | International Journal of Nanoelectronics and Materials, vol.14(3), 2021, pages 209-218 |
Abstract: | The purpose of this study is to enhance the sensitivity of Surface Plasmon Resonance (SPR) sensor using core-shell Fe3O4@Ag nanoparticles (NPs). Fe3O4@Ag NPs were synthesized by co-precipitation method with various concentration of Ag as a shell. The crystal structure of Fe3O4 corresponds to the cubic inverse spinel structure. The particle size of Fe3O4@Ag NPs with Ag concentration of 40mM is 13.8 nm. The saturation magnetization (Ms), and coercivity field (Hc) of Fe3O4@Ag NPs with Ag concentration of 20mM is 52.9 emu/g and 157.2 Oe, respectively, and then decreased with the increase of Ag concentration. An intensity of absorption peak increased with the increase of Ag concentration. A spherical nanoparticle consisting of a spherical Fe3O4 core covered by an Ag shell, was used as an active material to increase the signal detection of SPR, with a wavelength of 632.8 nm in the Kretschmann configuration. The system consists of a three-layer materials, i.e., prism/Au/Fe3O4@Ag NPs. The results show that the SPR angle shifted to the larger angle of incident light by using Fe3O4@Ag NPs and the addition of a core-shell in the conventional SPR-based biosensor leads to the enhancement of the SPR biosensor sensitivity. |
Description: | Link to publisher's homepage at http://ijneam.unimap.edu.my |
URI: | http://dspace.unimap.edu.my:80/xmlui/handle/123456789/72948 |
ISSN: | 1985-5761 (Printed) 1997-4434 (Online) |
Appears in Collections: | International Journal of Nanoelectronics and Materials (IJNeaM) |
Files in This Item:
File | Description | Size | Format | |
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Microstructures, Absorption Spectra, and Magnetic Properties.pdf | Main article | 530.61 kB | Adobe PDF | View/Open |
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