Abstract
In this work, light and temperature responsive, brush-painted photonic coatings exhibiting three different colored and surface topographical states are reported. The different states arise from the use of cholesteric liquid-crystalline micrometer-sized polymer particles as shape-memory photonic pigments that are dispersed in a shape-memory binder. The first temporal state is induced by compressing the photonic particles at high temperature, resulting in blueshift of the structural color. The second temporal state is obtained by embossing a diffractive grating on the surface at an intermediate temperature leading to a relief topography and a rainbow optical effect. Both optical and surface topographical changes coexist and are stable at room temperature until they are reverted independently either by heating or locally by light illumination. Multicolored paints that reflect selectively left-handed or right-handed polarized light are developed to create arbitrary polarization-dependent multicolor and topographical brush-painted patterns. These temperature and light responsive triple shape-memory photonic paints have potential applications as battery-free optical sensors, responsive decoration, and smart adhesives.
Original language | English |
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Article number | 2000054 |
Journal | Advanced Optical Materials |
Volume | 8 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 May 2020 |
Funding
This work was financially supported by the Netherlands Organization for Scientific Research (TOP‐PUNT 718.016.003). The authors thank Danielle van der Heijden for help in the laboratory and Jeroen Sol for the preparation of the molds.
Keywords
- cholesteric liquid-crystals
- micrometer-sized particles
- photonic materials
- responsive coatings
- shape-memory polymers