Indrayana IPT. SYNTHESIS, CHARACTERIZATION, AND APPLICATION OF Fe3O4 NANOPARTICLES AS A SIGNAL AMPLIFIER ELEMENT IN SURFACE PLASMON RESONANCE BIOSENSING. JoP [Internet]. 2020 Jul. 25 [cited 2025 Apr. 7];5(2):65-74. Available from: https://mail.online-journal.unja.ac.id/jop/article/view/8259