Effects of proton conduction on dielectric properties of peptides

Abstract

Mobile protons affect dielectric properties of peptides by forming an electrical double layer.

Electrical conductivity of Self-assembling Peptide-semiconducting dye Conjugate nanofibre networks

“…This behaviour under nitrogen and air atmospheric conditions confirm the strong dependence of the conductance of nanofibres on relative humidity. Such behaviour has been reported for proteins [38][39][40][41], peptides [42][43][44][45][46], synthetic polymers [47], DNA [48][49][50][51], and oxides [52], and in all cases, they have been attributed to protonic conductivity. Figure 10 shows the comparison Bode plot of the nanofibres formed from the di-conjugated sample under all varied atmospheric conditions.…”

Synaptic transistors based on a tyrosine-rich peptide for neuromorphic computing

“… 31 This result corresponds to our previous results from the electrochemical impedance analysis of the peptide-insulating layer. 32 The response of the transfer curves to repeated gate sweeps is shown in Fig. S3.…”

Tyrosine‐Rich Peptide Insulator for Rapidly Dissolving Transient Electronics

“…The film type self‐assembly is possible by disulfide bonding and optimized combination of cysteine, tyrosine, and alanine. The specific peptide film also demonstrated high dielectric constant that was superior to that of SiO 2, [ 15 ] and showed controllability on protonic conduction [ 16 ] and electronic conduction, [ 17 ] which are important for the natural interfacing of an abiotic unit to a biotic system.…”

“…At this specific condition, the film exhibits low surface roughness of 0.189 nm, high dielectric strength over electric field of 1 MV cm −1 , and high dielectric constant of 6.5. [ 15 ] The absorbance of the peptide film on the quartz substrate as a function of immersion time is demonstrated in Figure 1c. Tyrosine exhibits fingerprint peaks at 280 and 230 nm due to phenol and carboxylic acid, respectively.…”