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Surface Enhanced Raman Spectroscopy with La0.5Bi0.5FeO3-Based Substrates for Paraquat Pesticide Detection

Nia Tiawati  -  Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, Indonesia
*Djoko Triyono orcid scopus  -  Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, Indonesia
Muhandis Shiddiq orcid  -  Research Center for Photonics, National Research and Innovation Agency (BRIN), Tangerang Selatan, Indonesia
Received: 14 Mar 2025; Revised: 12 May 2025; Accepted: 21 May 2025; Available online: 31 May 2025; Published: 31 May 2025.

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Abstract

Paraquat is a highly toxic herbicide that poses serious environmental and health risks. Conventional detection methods are accurate but often complex and time-consuming. This study explores the use of La0.5Bi0.5FeO3 (LBFO) perovskite as a novel Surface-Enhanced Raman Spectroscopy (SERS) substrate. LBFO was synthesized via a sol-gel method and characterized using XRD, XRF, UV-Vis, and Raman spectroscopy. The LBFO-based substrate successfully enhanced the Raman signals of paraquat, enabling detection at concentrations as low as 6 ppm. These results suggest the feasibility of LBFO as an effective and low-cost SERS substrate for rapid paraquat detection.

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Keywords: SERS; LBFO; Perovskite; Substrate; Paraquat
Funding: UI; BRIN

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