使用新型SPR传感器对表面等离子体进行数学建模并检测DNA杂交
Jay Kumar Yadav1, S K Tripathy1
1Department of Electronics and Communication Engineering, National Institute of Technology, Silchar, 788010, Assam, India.
Biosensors & bioelectronics
|July 8, 2025
概括
这项研究引入了一种新的表面等离子体共振 (SPR) 生物传感器,使用矿和石墨烯进行脱氧核糖核酸 (DNA) 杂交检测. 基于银的传感器显示出与黄金相比更高的性能,用于增强DNA传感.
科学领域:
- 光电学是指光电子产品.
- 生物感应是一种生物感应.
- 材料科学 材料科学 材料科学
背景情况:
- 表面等离子体共振 (SPR) 传感器对于无标签的生物分子检测至关重要.
- 脱氧核糖核酸 (DNA) 杂交检测需要高灵敏度的生物传感平台.
- 矿材料为先进的传感器应用提供独特的光学性能.
研究的目的:
- 提出和分析一个新的克雷奇曼基于配置的SPR传感器.
- 研究矿材料与黄金 (Au) 或银 (Ag) 和石墨烯相结合的使用,以增强DNA杂交检测.
- 优化传感器结构,以改善性能参数,如灵敏度和功绩数字 (FoM).
主要方法:
- 提出了一个多层SPR传感器结构:SF01/Cr2O3/(Au/Ag) /矿/石墨烯/分析剂.
- 利用弗雷内尔反射和转移矩阵方法 (TMM) 来进行层优化.
- 开发了表面等离子体生成和石墨烯质量因子分析的数学模型.
主要成果:
- 反射光谱显示了单链DNA (ssDNA) 和双链DNA (dsDNA) 的显著共振角度转移.
- 与黄金 (Au) 传感器相比,基于银 (Ag) 的传感器表现出更高的灵敏度,质量因子,FoM和DFOM.
- 性能提升归因于石墨烯与DNA的免费载荷体之间的相互作用改善.
结论:
- 拟议的SPR传感器结构显示了敏感和无标签的DNA杂交检测的前景.
- 银和矿与石墨烯的组合提供了增强的生物感知能力.
- 这种新型传感器设计可能是DNA生物传感技术的重大进步.
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