ACADSTAFF UGM

CREATION
Title : Core-shell Fe3O4@Ag magnetic nanoparticles detection using spinvalve GMR sensing element in the wheatstone bridge circuit
Author :

NUR AJI WIBOWO (1) JUHARNI (2) TAUFIKUDDIN A (3) LIA SAPTINI H (4) Prof. Dr. Harsojo, SU., M.Sc. (5) Dr.Eng. Edi Suharyadi, S.Si., M.Eng. (6)

Date : 9 2020
Keyword : : biosensor, core-shell, giant magnetoresistance, magnetic nanoparticles, magnetite, silver, spin-valve : biosensor, core-shell, giant magnetoresistance, magnetic nanoparticles, magnetite, silver, spin-valve
Abstract : Core–shell Fe3O4@Ag magnetic nanoparticles(MNPs)integrated with a Wheatstone bridge-giant magnetoresistance (GMR)sensor provide access to GMR-based biosensors. The Fe3O4 nanoparticles synthesized using the coprecipitation method demonstrated 77 emu g?1 of magnetization saturation (MS), 51 Oe of coercivity (HC), and particle size of 11 nm. Furthermore, core–shell Fe3O4@Ag MNPs prepared by the aqua-solution method possessed 53 emu g?1 of MS, 145 Oe of HC, and 17 nm of particle size. This high MS of nanoparticles not only offer a large induced magnetic field but is sufficient for particle penetration within the biofilms. It was discovered that the sensor can distinguish between the bare Fe3O4with the Fe3O4@Ag nanoparticles through an output voltage increase corresponding to a decrease in MS. The output signal of the sensor responds linearly to an increase in the core–shell Fe3O4@Ag nanoparticle concentration, owing to an increase in the induced-field. The sensor exhibits better sensitivity when applied in detecting less than 2 g L?1 of nanoparticle concentration, that is, 0.76 mV per unit of concentration (g/L).
Group of Knowledge : Fisika
Original Language : English
Level : Internasional
Status :
Published
Document
No Title Document Type Action
1 Core-shell Fe3O4@Ag magnetic nanoparticles detection using spin- valve GMR sensing element in the wheatstone bridge circuit.pdf
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2 Bukti-Korespondesi_MRX_Nur-Aji.pdf
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3 2020_MRX_Nur-Aji_Lengkap.pdf
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4 2020mrxnur-ajilengkappdf artikel 13.pdf
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