Fig. 3: a Reflectance spectra of a BCP SC sensor as a function of strain.

The initial BCP SC without strain, which exhibits a wavelength at the maximum reflection of approximately 650 nm, blueshifted with strain. b Plot of the wavelength at the maximum reflection as a function of strain. c Photographs of the sensor as a function of strain. All scale bars represent 1 cm. d Wavelengths at the maximum reflection during repetitive stretching (100% strain) and release cycles. e Variation in the wavelength at the maximum reflection with repetitive stretching (100% strain) and release cycles. f 1D SAXS plots of the scattering intensity vs. the scattering vector qz of BCP SC films under different strains. To achieve a sufficient scattering intensity, 10 BCP films were stacked on each other. g Periodicities of the BCP lamellae under strains of 0, 50, 100, and 0%