Mechanochromic photonic sensor using highly refractive colloidal particles

Seamin Park; Sanghoon Lee; Young-Seok Kim

doi:10.1117/12.3002804

13 March 2024 Mechanochromic photonic sensor using highly refractive colloidal particles

Seamin Park, Sanghoon Lee, Young-Seok Kim

Proceedings Volume 12896, Photonic and Phononic Properties of Engineered Nanostructures XIV; 128960E (2024) https://doi.org/10.1117/12.3002804
Event: SPIE OPTO, 2024, San Francisco, California, United States

Conference Poster

Abstract

Structural colors have the advantage of high reflectance for specific wavelengths, and are generally implemented with SiO₂, PE, PS and PMMA. However, existing crystalline structural color films require particle alignment and precise particle uniformity control, making them difficult to manufacture and highly dependent on the viewing angle. Non-close packed structural color films are relatively free of these problems. In this study, based on high refractive index core-shell particles, we propose a mechanochromic strain sensor that can distinguish the direction, position, and degree of deformation. A film was fabricated using silica coated iron oxide core-shell particles having a high refractive index and black color. It has been demonstrated that this film sensor can display a 2D color profile in response to localized weight or strain.

Citation Download Citation

Seamin Park, Sanghoon Lee, and Young-Seok Kim "Mechanochromic photonic sensor using highly refractive colloidal particles", Proc. SPIE 12896, Photonic and Phononic Properties of Engineered Nanostructures XIV, 128960E (13 March 2024); https://doi.org/10.1117/12.3002804

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