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All Journal Indonesian Physical Review
Ahmad Taufiq
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang
Education Physics

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SILVER NANOPARTICLES AS COATING FOR FIBER BRAGG GRATINGS IN LEAD DETECTION Zumrotul ‘Aliyah; Arif Hidayat; Nurul Hidayat; Muhammad Safwan Abd Aziz; ST. Ulfawanti Intan Subadra; Ahmad Taufiq
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.685

Abstract

Water pollution from heavy metals, including lead (Pb2+), remains a serious problem for humanity due to their use in various industries. Although the development of water detection sensors has also been widely pursued, including etched fiber Bragg gratings (e-FBG) and tilted FBG (TFBG). FBG is unique because the optical fiber is modified, enabling it to act as a sensitive sensor for detecting Pb2+. However, the existing devices require modifications that entail high costs, the need for skilled operators, and even complex preparation. Therefore, this study reports an FBG-based sensor utilizing AgNPs as a functional material for Pb2+ detection. Notably, the AgNPs were synthesized using laser ablation. In this study, AgNPs were coated onto FBGs to utilize localized surface plasmon resonance (LSPR) for lead detection, achieving a minimum detection limit of 0.65 ppm, a sensitivity of 9.2 × 10-3 dBm/ppm, and high selectivity for Pb2+. Although the detection limit is not below the WHO threshold, these results demonstrate that Ag-coated conventional FBGs have potential for Pb2+ detection n through simple, low-cost, and eco-friendly modifications. Therefore, further modifications are required to enhance the Pb2+ detection performance of the nanoparticle coating on the FBG.
INVESTIGATION OF THE STRUCTURAL, MORPHOLOGICAL, AND MAGNETIC PROPERTIES OF BARIUM HEXAFERRITE/TITANIA NANOCOMPOSITE Mahmiyah Mahmiyah; Suneyna Rawat; Nur Hanifah; Arif Hidayat; Ahmad Taufiq
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.692

Abstract

Currently, demand for magnetic materials across various industrial sectors continues to grow. Among hard magnetic ferrites, barium hexaferrite is widely used due to its ability to retain magnetization after removal of the external magnetic field. Despite these advantages, its relatively high density and tendency to agglomerate can limit its use in certain applications. Therefore, titania was incorporated as a complementary phase to modify the properties of barium hexaferrite. This study presents a simple and modular approach for preparing a barium hexaferrite/titania nanocomposite through separate coprecipitation and sol–gel routes, followed by wet mixing of 0.6 g of barium hexaferrite and 0.4 g of titania. The resulting nanocomposite was characterized using XRD, SEM-EDX mapping, FTIR, and VSM. The XRD pattern revealed the formation of barium hexaferrite and anatase titania phases, with crystallite sizes of 62.12 and 15.26 nm, respectively, along with hematite and barium carbonate impurity phases. The FTIR spectrum showed characteristic bands associated with Ba–O, Fe–O, Ti–O, C–O, and O–H bonds. SEM-EDX mapping analysis revealed a dense and aggregated morphology with relatively uniform surface topography, containing Ba, Fe, Ti, and O. The VSM hysteresis curve demonstrated ferrimagnetic behavior, with Ms, Mr, and Hc values ​​of 18.86 emu/g, 7.88 emu/g, and 4663 Oe, respectively.  
Co-Authors Arif Hidayat Mahmiyah Mahmiyah Muhammad Safwan Abd Aziz Nur Hanifah Nurul Hidayat ST. Ulfawanti Intan Subadra Suneyna Rawat Zumrotul ‘Aliyah