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. 2021 Feb 10;8:611833. doi: 10.3389/fchem.2020.611833

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Copyright © 2021 Gogoi, Konwer and Zhuo.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Imaging of the Raman peak of FGGO at 1593 cm⁻¹, excited by circular polarization, and the fitted CIDs at four different points. (A) Results for left circular polarization. (B) Results for right circular polarization. (C) The fitted CIDs at four points of the nanostructure. CID, circular intensity difference; FGGO, fmoc-glycyl-glycine-OH. The figure has been adapted with permission from Sun et al., (2013), 2013 CIOMP.