Fig. 2: Characterization of STIFs.
From: Nanoconfined entanglement-enhanced phase separation enables tough and contractile ionogel fibers
a SEM images of S1TyIFs with different twist densities. b SEM image of S1T20IF at an elongation of 400%. The inset showing the magnified interface between adjacent filaments. c SEM image of cross section of S1T20IF. d Raman mapping image of S1T20IF, based on the intensity of the NH₂ deformation vibration mode at ~1580 cm⁻¹. The color scale represents the relative intensity of the ν(NH₂) band. e Raman spectra of two regions squared in (d). The dotted arrow highlights the contrast in peak intensity between the two regions. f Temperature dependence of loss tangent (tan δ) of S1T20IF and control samples S1T0IF, S0T20IF and S1T20F. g, POM images of the S0T0IF, S1T20IF and S4T20IF viewed between crossed polarizers. A, analyzer. P, polarizer. h Variation of light transmitted through S0T0IF, S1T20IF and S4T20IF with different polarizer angles. i, Scattering intensity versus azimuthal angle plots of S0T0IF, S1T20IF and S4T20IF.
