Diffraction-Pattern Based on Spontaneous Wrinkled Thin Films

Abstract

We investigate wrinkled thin lms by small angle light scattering and microscope, demonstrating that wrinkled thin lms are gratings. The diversity of diffraction patterns is realized by a simple light path through wrinkles. Fourier transform is introduced to explain the position and pattern of diffraction orders. The analysis could be a fast and quantized characterization for complex wrinkles.

Near-infrared light–responsive dynamic wrinkle patterns

“…For example, the NIR-responsive dynamic wrinkle pattern shown in Fig. 2 can be used as the optical grating for dynamically tuning light diffraction, which is a challenge in the field of light control (17,(47)(48)(49)(50)(51)(52). The optically transparent materials with a surface micropattern can cause light diffraction when a light beam passes through these samples (Fig.…”

Wrinkling on Stimuli-Responsive Functional Polymer Surfaces as a Promising Strategy for the Preparation of Effective Antibacterial/Antibiofouling Surfaces

“…The distribution of the wrinkled patterns is not significantly affected by the variation of hydrogel composition; in all cases, the distribution is homogenous in all directions, forming herringbone-like structures [ 35 ]. The 2D-FFT results allow us to demonstrate this affirmation due to concentrical rings with different intensities, which is a typical pattern characteristic of homogeneous wrinkled distributions that do not have any preferred ordering direction [ 36 , 37 , 38 ]. This kind of homogenous herringbone-like structure is typical of free equi-biaxial contractions [ 39 , 40 ], which, in this case, was produced by a mechanical contraction as a result of the deswelling process when the sample is dried under vacuum.…”