Surface Plasmon Resonance Microscopy Based on Total Internal Reflection

被引：5
|
作者：
Zhang, Teliang [1 ]
Wang, Xueliang [1 ]
Zeng, Youjun [2 ]
Huang, Songfeng [1 ]
Dai, Xiaoqi [1 ]
Kong, Weifu [1 ]
Liu, Qian [1 ]
Chen, Jiajie [1 ]
Qu, Junle [1 ]
Shao, Yonghong [1 ]
机构：
[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China
[2] Guangdong Univ Technol, Coll Phys & Optoelect Engn, Guangzhou 510006, Peoples R China
来源：
BIOSENSORS-BASEL | 2023年 / 13卷 / 02期
基金：
中国国家自然科学基金;
关键词：
total internal reflection; surface plasmon resonance; surface plasmon resonance microscopy; biomolecular interaction;
D O I：
10.3390/bios13020261
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Surface plasmon resonance microscopy (SPRM) has been widely employed in biological fields because of its high spatial resolution and label-free detection modality. In this study, SPRM based on total internal reflection (TIR) is studied via a home-built SPRM system, and the principle of imaging of a single nanoparticle is analyzed as well. By designing a ring filter and combining it with the deconvolution algorithm in Fourier space, the parabolic tail of the nanoparticle image is removed, in which a spatial resolution of 248 nm is obtained. In addition, we also measured the specific binding between the human IgG antigen and goat anti-human IgG antibody using the TIR-based SPRM. The experimental results have proved that the system can image sparse nanoparticles and monitor biomolecular interactions.
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页数：10
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