Fig. 1: Film formation and proton conduction of the Y7C peptide. | Nature Communications

Fig. 1: Film formation and proton conduction of the Y7C peptide.

From: Proton-enabled activation of peptide materials for biological bimodal memory

Fig. 1: Film formation and proton conduction of the Y7C peptide.The alternative text for this image may have been generated using AI.

(a) Chemical structure of the Y7C peptide. The phenolic groups of tyrosine and thiol groups of cysteine are highlighted in red and blue, respectively. (b) Molecular structure of the dimer of Y7C revealed by NMR. Carbon, oxygen, and nitrogen are shown in gray, red, and purple, respectively. (c) Cross-sectional HRTEM image of the Y7C film between Pt and Ag electrodes. A uniform and homogeneous film with a thickness of 117 nm can be identified between the Pt bottom electrode and the Ag top electrode. (d) Circular dichroism (CD) analysis of the Y7C film. The solid CD spectrum is expressed in degrees of ellipticity (θ) without concentration terms. (e) Nyquist plots measured from the Y7C film in contact with two Au electrodes at different RH. The inset shows the magnified range at RH values of 60%, 75%, and 90%. (f) Conductivity of the Y7C film calculated from the Nyquist plot as a function of RH. Error bars represent the mean ± SD.

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