Real-Time and Label-Free Monitoring of Biomolecular Interactions within Complex Biological Media Using a Silica Colloidal Crystal Film
- 22 July 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 12 (32), 35950-35957
- https://doi.org/10.1021/acsami.0c10926
Abstract
A method capable of real-time and label-free monitoring of biomolecular interactions within whole blood, with-out any sample separation and label process is described. This was accomplished using silica colloidal crystal (SCC) films, three-dimensionally ordered silica particle arrays whose interference effect is a function of their optical thickness, as interfer-ence sensitive substrates. Interaction between immunoglobulins G (IgG) and protein A from staphylococcus aureus (SPA) con-jugates with changes in optical thickness of SCC films was monitored spectroscopically. Successful detection of IgG was achieved in buffer and whole blood. This system constitutes a simple label-free analysis showing great potential in monitoring interactions between biomolecules in complex biological media.Funding Information
- Ministry of Science and Technology of the People's Republic of China (2017YFA0205303, 2017YFE0100200)
- Government of Jiangsu Province (KYCX18_0158)
- National Natural Science Foundation of China (21775020)
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