4D Direct Laser Writing of Submerged Structural Colors at the Microscale
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AbstractBiomimetic stimuli-responsive structure colors (SCs) can improve the visualization and identification in the micro functional structure field such as information encryption/decryption and smart actuators. However, it is still challenging to develop the ability to 4D print arbitrary submerged colorful patterns with stimuli-responsive materials at the microscale. Herein, a hydrogel photoresist with feature resolution (98 nm) for the fabrication of 4D microscopic SCs by the femtosecond direct laser writing method is developed. The 4D printed woodpile SCs are grouped as pixel palettes with various laser parameters and they spanned almost the entire color space. The coloring mechanism of diffraction gratings is not only investigated by optics microscopy and spectroscopy but also supported by simulation. Moreover, the 4D printed hydrogel-integrated amphichromatic fish constructions and pixelated painting can visually discolor reversibly by regulating the solution pH. This finding promises an ideal coloring method for sensors, anti-counterfeiting labels, and transformable photonic devices.
Acceptance Date16/11/2022
All Author(s) ListLiu BR, Dong B, Xin C, Chen C, Zhang LR, Wang DW, Hu YL, Li JW, Zhang L, Wu D, Chu JR
Journal nameSmall
Volume Number19
Issue Number2
Article number2204630
LanguagesEnglish-United Kingdom
Keywordsdirect laser writing, femtosecond lasers, four-dimensional printing, pH-responsive hydrogels, structure colors
Web of Science Subject CategoriesChemistry, Multidisciplinary;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter;Chemistry;Science & Technology - Other Topics;Materials Science;Physics

Last updated on 2024-16-04 at 00:31