Fig. 1
From: Chemically and thermally stable silica nanowires with a β-sheet peptide core for bionanotechnology
TEM images showing the chemical and thermal stability of K/A and K/R fibrils before (a) and after incubation for 1 h with harsh conditions. These harsh conditions included (b) 2-propanol, c ethanol, d AcN, e HCl, pH 1.5, and f heating up to 70°. K/A variants were initially stable when incubated with organic polar solvents but not at low pH. Moreover, K1A peptide was able to form nano-tubular structures in organic solvents. K/A variants were initially stable when heated up to 70 °C, while K/R variants underwent degradation into small non-fibrillar molecules following incubation in all conditions