Label-Free Multimetric Measurement of Molecular Binding Kinetics by Electrical Modulation of a Flexible Nanobiolayer.

Label-Free Multimetric Measurement of Molecular Binding Kinetics by Electrical Modulation of a Flexible Nanobiolayer.
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DOI:
10.1021/acssensors.2c01804
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发表时间:
2022-11-25
期刊:
影响因子:
8.9
通讯作者:
Wang, Shaopeng
Wang, Shaopeng
中科院分区:
化学1区
文献类型:
--
作者:
Zhou, Xiaoyan;Ma, Guangzhong;Wan, Zijian;Wang, Shaopeng

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Most label-free techniques rely on measuring refractive index or mass change on the sensor surface. Thus, it is challenging for them to measure small molecules or enzymatic processes that only induce minor mass change on the analyte molecules. Here, we have developed a technique by combining Surface Plasmon Resonance sensing with an Oscillating Biomolecule Layer approach (SPR-OBL) to enhance the sensitivity of traditional SPR. Additional to the inherent mass sensitivity, SPR-OBL is also sensitive to the charge and conformational change of the analyte, hence overcomes the mass limit and is able to detect small molecules. We show that the multi-metric SPR-OBL measurement allows for sensing any changes regarding mass, charge, and conformation, which expands the detection capability of SPR.
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