Singh Maneesh Kumar, Pal Sarika, Prajapati Yogendra Kumar
IEEE Trans Nanobioscience. 2023 Jan;22(1):106-112. doi: 10.1109/TNB.2022.3159532. Epub 2022 Dec 29.
Detection of formalin to prevent food adulteration, especially in tropical countries, is of primary concern for public health issues. Life-threatening diseases such as leukaemia and lymphoma occur due to the regular consumption of formalin with food. Traditionally, spectrophotometry and chromatography-based sensors have been employed to detect formalin, which have limitations related to their ability to achieve high sensitivity, selectivity, and fast response. In this paper, a surface plasmon resonance (SPR) sensor for improved sensing of formalin is proposed. The Kretschmann configured SPR sensor probe is designed using silver (Ag), platinum (Pt), antimonene, and chitosan, which increases the sensitivity and selectivity. The maximum sensitivity achieved for the proposed SPR sensor is 206.86 °/RIU. The distribution of the electric field (Ey) component of the electric field is also evaluated to analyze the field enhancement at different layer interfaces and to calculate the penetration depth (176.75 nm).
检测福尔马林以防止食品掺假，特别是在热带国家，是公共卫生问题的首要关注点。白血病和淋巴瘤等危及生命的疾病是由于经常食用含有福尔马林的食物而发生的。传统上，已采用基于分光光度法和色谱法的传感器来检测福尔马林，这些传感器在实现高灵敏度、选择性和快速响应的能力方面存在局限性。本文提出了一种用于改进福尔马林传感的表面等离子体共振（SPR）传感器。采用银（Ag）、铂（Pt）、锑烯和壳聚糖设计了Kretschmann配置的SPR传感器探头，提高了灵敏度和选择性。所提出的SPR传感器实现的最大灵敏度为206.86 °/RIU。还评估了电场的电场（Ey）分量的分布，以分析不同层界面处的场增强并计算穿透深度（176.75 nm）。
