RT Journal Article
T1 Evanescent wave sensor for potassium ion detection with special reference to agricultural application
A1 Potdar, Revati P.
A1 Khollam, Yogesh
A1 Shaikh, Shoyebmohamad F.
A1 Raut, Rajesh W.
A1 Pandit, Bidhan
A1 More, Pravin S.
AB We are introducing 4 & PRIME;-aminodibenzo-18-crown-6 ether (A2BC) modification of gold nanoparticles coated optical fiber as a new sensor for evanescent wave trapping on the polymer optical fiber to detect low-level potassium ions. We characterized these gold nanoparticles by X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Nanoparticle tracking analysis (NTA), Field Emission scanning electron microscopes (FE-SEM), and UV-Visible spectroscopy. In the present study, we modified the gold nanoparticles with A2BC for selective sensing of potassium (K+) ions. The interaction between A2BC and K+ ions leads to the temporary formation of a sandwich structure as crown ethers form steady complexes with metal ions. This sandwich structure leads to potassium detection. In our implementation, related operational parameters such as cladding length, roughness, and concentration of A2BC and gold nanoparticles, were optimized to achieve a detection threshold of 1 ppm. Additionally, we optimized the optical fiber sensor to increase its detection sensitivity from the μV range to themV range. The sensor demonstrates a fast response time (10 s) and high sensitivity, selectivity, and stability, which cause a wide linear range (1-100 ppm) and a low limit of detection (LOD = 0.14 ppm). Lastly, we tested the sensor for a soil-sensing application.
PB Elsevier
SN 1010-6030
YR 2023
FD 2023-07-01
LK https://hdl.handle.net/10016/39384
UL https://hdl.handle.net/10016/39384
LA eng
NO Acknowledgments. The authors would like to thank Rajiv Gandhi Science and Technology Commission, Mumbai. Maharashtra for providing financial assistance and Director, The Institute of Science, Dr. Homi Bhabha State University, Mumbai, for providing laboratory access for carrying out experiments. The authors would also like to thank DST for providing instruments to the Institute of Science under their FIST scheme. The authors would like to thank the researchers supporting project number (RSP2023R370), King Saud University, Riyadh, Saudi Arabia, for financial support.
DS e-Archivo
RD 27 jul. 2024