This work presents a surface plasmon resonance biosensor for the figure of merit enhancement by using Ga-doped zinc oxide (GZO), i.e., nanostructured transparent conducting oxide as plasmonic material in place of metal at the telecommunication wavelength. Two-dimentional graphene is used here as a biorecognition element (BRE) layer for stable and robust adsorption of biomolecules. This is possible due to stronger van der Waals forces between graphene's hexagonal cells and carbon-like ring arrangement present in biomolecules. The proposed sensor shows improved biosensing due to fascinating electronic, optical, physical, and chemical properties of graphene. This work analyses the sensitivity, detection accuracy, and figure of merit for the GZO/graphene SPR sensor on using the dielectric layer in between the prism and GZO. The highest figure of merit of 366.7 RIU⁻¹ is achieved for the proposed SPR biosensor on using the nanostructured GZO at the 3000 nm dielectric thickness. The proposed SPR biosensor can be used practically for sensing of larger size biomolecules with due availability of advanced techniques for the fabrication of the nanostructured GZO and graphene.

这项工作提出了一种表面等离振子共振生物传感器，可通过使用Ga掺杂的氧化锌（GZO）（即纳米结构的透明导电氧化物作为等离激元材料代替电信波长的金属）来提高品质因数。二维石墨烯在此处用作生物识别元素（BRE）层，用于稳定而牢固地吸附生物分子。这可能是由于石墨烯的六角形细胞与生物分子中存在的类碳环结构之间的范德华力更强。由于石墨烯具有令人着迷的电子，光学，物理和化学特性，因此拟议的传感器显示出改善的生物传感。这项工作分析了在棱镜和GZO之间使用介电层时GZO /石墨烯SPR传感器的灵敏度，检测精度和品质因数。对于拟议的SPR生物传感器，使用纳米结构的GZO以3000 nm的介电层厚度可达到^-1。所提出的SPR生物传感器可实际用于感测较大尺寸的生物分子，并且具有制造纳米结构GZO和石墨烯的先进技术的适当可用性。