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. 2020 Jan 24;3:11. doi: 10.1038/s42004-020-0259-4

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© The Author(s) 2020, corrected publication 2023

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Fig. 4 — a FTIR spectra of 1 at 25 and 60 °C. Stained TEM images of 1 dried at 25 °C (b) and 60 °C (c), scale bar is 25 nm. Inset in (b) and (c) is corresponding density profile.