Abstract
Molecular chirality refers to molecules with the same composition but with different three-dimensional orientation. In biological systems, almost all molecules have chiral structures. Since molecules with different chirality may vary differently in their biochemical reaction, it is important to detect and separate these molecules in the biomedical and pharmaceutical industry. Despite significant progress made toward single-molecule sensing, it is still challenging to differentiate and detect chiral molecules at single-molecule resolution in racemic mixtures. Herein, we discuss the existing techniques towards single chiral molecule sensing and separation. We start with traditional methods, specifically chiral chromatographic methods, which label the chiral molecules with surfactants or other molecules in order to separate and detect them. New techniques using electromagnetic fields for label-free chiral sorting will also be explored. We then review the use of nanophotonic platforms to increase chiro-optical responses for chiral sensing with high sensitivity down to picogram quantities. We finalize with our perspective on opportunities and challenges for future development.
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Acknowledgements
The authors acknowledge the financial support of the National Science Foundation (NSF–ECCS–2001650), the National Aeronautics and Space Administration Early Career Faculty Award (80NSSC17K0520), and the National Institute of General Medical Sciences of the National Institutes of Health (DP2GM128446). The authors also acknowledge the generous contribution of three illustrations by Naftal Mat Mautia.
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Sanders, R., Liu, Y., Zheng, Y. (2022). Towards Single-Molecule Chiral Sensing and Separation. In: Bowen, W., Vollmer, F., Gordon, R. (eds) Single Molecule Sensing Beyond Fluorescence . Nanostructure Science and Technology. Springer, Cham. https://doi.org/10.1007/978-3-030-90339-8_9
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DOI: https://doi.org/10.1007/978-3-030-90339-8_9
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