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. Author manuscript; available in PMC: 2024 Sep 16.
Published in final edited form as: ACS Nano. 2018 Jun 28;12(7):6612–6619. doi: 10.1021/acsnano.8b01425

Figure 3. PTIR measurement of FF fibrils in air and H2O.

Figure 3.

Morphology and IR absorption map (1615 cm−1) for FF fibrils in a) air and b) H2O. c) Comparison of the average PTIR spectra covering the Amide I band (green), amide II (blue) and C-C ring (orange) spectral regions. The + symbols mark the locations where the individual spectra reported in the SI Figs 2–3 where acquired. d) Comparison of the second derivatives of the spectra in the Amide band I and C-C ring absorption.