Optical sensing of vitamin C concentrations: a novel approach with etched fiber-based plasmon sensor

Kuldeep Choudhary; B. Bala Subbanna; Shikha Uniyal; Prabha Shankar Sharma; Vivek Kumar Gupta; Sanjeev Kumar Raghuwanshi; Santosh Kumar

doi:10.1117/12.2691324

13 March 2024 Optical sensing of vitamin C concentrations: a novel approach with etched fiber-based plasmon sensor

Kuldeep Choudhary, B. Bala Subbanna, Shikha Uniyal, Prabha Shankar Sharma, Vivek Kumar Gupta, Sanjeev Kumar Raghuwanshi, Santosh Kumar

Author Affiliations +

Proceedings Volume 12858, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XXI; 1285802 (2024) https://doi.org/10.1117/12.2691324
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Vitamin C, or ascorbic acid, is a vital nutrient with significant implications for human health. Accurate and rapid detection of vitamin C concentrations in various samples holds immense importance in medical, pharmaceutical, and food industries. In this study, we introduce a novel approach utilizing an etched fiber-based plasmon sensor for sensitive and selective detection of vitamin C. The biosensor employs a gold-coated optical fiber with a precisely etched region, enabling the excitation of surface plasmon polaritons (SPPs). The interaction between SPPs and the vitamin C analyte induces changes in the refractive index near the fiber surface, consequently causing shifts in the resonance wavelength of the plasmonic mode. By monitoring these wavelength shifts, the concentration of vitamin C in the sample can be accurately determined. This research presents a promising platform for enhanced detection of vitamin C, offering potential applications in various fields.

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Kuldeep Choudhary, B. Bala Subbanna, Shikha Uniyal, Prabha Shankar Sharma, Vivek Kumar Gupta, Sanjeev Kumar Raghuwanshi, and Santosh Kumar "Optical sensing of vitamin C concentrations: a novel approach with etched fiber-based plasmon sensor", Proc. SPIE 12858, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XXI, 1285802 (13 March 2024); https://doi.org/10.1117/12.2691324

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