光学学报, 2020, 40 (11): 1117001, 网络出版: 2020-06-10
一种基于功能化修饰磁性纳米颗粒的石墨烯基光学生物传感器 下载: 1185次
Graphene-Based Optical Biosensor Using Functionalized Magnetic Nanoparticles
图 & 表
图 1. TIR条件下的石墨烯偏振选择吸收特性。(a) TIR条件下含有石墨烯的三明治结构模型;(b) TIR条件下含有石墨烯时不同偏振态反射率与入射角的关系;(c)有无石墨烯两种情况下反射率差值与光疏介质折射率的关系
Fig. 1. Polarization-sensitive absorption of graphene under TIR condition. (a) Sandwich structure model with graphene under TIR condition; (b) relationship between the reflectance at TE/TM polarization states and the incident angle with graphene under TIR condition; (c) relationship between the reflectance difference and the refractive index of the optically thinner medium with/without graphene
图 3. 功能化修饰的磁性纳米颗粒的折射率传感流程图
Fig. 3. Flowchart of refractive index sensing for functionalized magnetic nanoparticles
图 4. Fe3O4@Au磁性纳米颗粒的修饰。(a) Fe3O4@Au纳米颗粒的TEM图;(b) Fe3O4@Au纳米颗粒的紫外可见光谱
Fig. 4. Modification of Fe3O4@Au magnetic nanoparticles. (a) TEM image of Fe3O4@Au nanoparticles; (b) UV-visible spectrum of Fe3O4@Au nanoparticles
图 5. 不同浓度氯化钠溶液对应折射率的电压响应。(a)实时电压变化;(b)折射率与电压关系
Fig. 5. Voltage response of refractive index at different sodium chloride concentrations. (a) Real-time voltage change; (b) relationship of refractive index and voltage
图 6. 磁性纳米颗粒固定的实时电压响应
Fig. 6. Real-time voltage response when magnetic nanoparticles was immobilized on the surface of graphene
图 7. 不同磁场强度下磁性颗粒吸附在石墨烯表面的明场显微图像。(a) 0 mT; (b) 80 mT
Fig. 7. Bright-field micrograph of magnetic nanoparticles adsorbed on the surface of graphene under different magnetic field intensities. (a) 0 mT; (b) 80 mT
图 8. 不同浓度OTA实时电压响应
Fig. 8. Real-time voltage response of Ochratoxin A at different concentrations
图 9. 不同浓度OTA与传感器输出电压的关系
Fig. 9. Relationship between different concentrations of Ochratoxin A and output voltage
张慧琴, 孙立勋, 杨艺哲, 吴晓静, 杨勇, 朱思伟, 袁小聪. 一种基于功能化修饰磁性纳米颗粒的石墨烯基光学生物传感器[J]. 光学学报, 2020, 40(11): 1117001. Huiqin Zhang, Lixun Sun, Yizhe Yang, Xiaojing Wu, Yong Yang, Siwei Zhu, Xiaocong Yuan. Graphene-Based Optical Biosensor Using Functionalized Magnetic Nanoparticles[J]. Acta Optica Sinica, 2020, 40(11): 1117001.