{"id":150534,"date":"2026-01-20T13:40:09","date_gmt":"2026-01-20T18:40:09","guid":{"rendered":"https:\/\/www.ucf.edu\/news\/?p=150534"},"modified":"2026-02-24T14:04:48","modified_gmt":"2026-02-24T19:04:48","slug":"ucf-researcher-creates-color-changing-tunable-photonic-material-inspired-by-nature","status":"publish","type":"post","link":"https:\/\/www.ucf.edu\/news\/ucf-researcher-creates-color-changing-tunable-photonic-material-inspired-by-nature\/","title":{"rendered":"麻豆原创 Researcher Creates Color-Changing, Tunable Photonic Material Inspired by Nature"},"content":{"rendered":"<hr \/>\n<p>Color isn\u2019t just about looks \u2014 it plays a vital role in how we communicate, protect ourselves and interact with the world. Debashis Chanda, a researcher and professor at 麻豆原创\u2019s <a href=\"https:\/\/www.nanoscience.ucf.edu\/\">NanoScience Technology Center<\/a>, has developed a new material that can change color dynamically in response to external stimuli like temperature, which creates a new possibilities for materials and devices to respond, adapt and be reconfigured in real time.<\/p>\n<p>Most colors in commercial and industrial products come from pigments, which absorb, reflect light and fades over time. However, structural colors, which are found in animals like octopuses, use nanoscale structures to control how light reflects. Inspired by this efficient approach, <a href=\"https:\/\/www.ucf.edu\/news\/ucf-researcher-creates-worlds-first-energy-saving-paint-inspired-by-butterflies\/\">Chanda has been researching how to create more vibrant, angle-independent colors without relying on chemical pigments for years<\/a>.<\/p>\n<p>His latest development addresses the challenges with dynamically tunable color, complex designs and manufacturing challenges of structural colors, which may make it easier to commercially manufacture these materials. The concept holds immense promise for applications in thermal sensing, advanced textile engineering, camouflage and reconfigurable displays.<\/p>\n<p>The <a href=\"https:\/\/www.ucf.edu\/research\/\">research<\/a> was recently published in <a href=\"https:\/\/doi.org\/10.1073\/pnas.2520990122\"><em>Proceedings of the National Academy of Sciences<\/em> (PNAS)<\/a>, an esteemed scholarly journal by the National Academy of Sciences. It also includes contributions from researchers <strong>Aritra Biswas \u201921MS \u201924PhD<\/strong>, Pablo Cencillo-Abad, Souptik Mukherjee, <strong>Jay Patel<\/strong> <strong>\u201925<\/strong>\u00a0and <strong>Mahdi Soudi \u201925<\/strong>.<\/p>\n<h2>How it Works<\/h2>\n<p>Chanda\u2019s approach uses phase modulation of a multilayer stack composed of a phase-changing material and a high-index material on a reflective surface. When the temperature shifts, the way light moves through the material changes, causing the surface color to change as well.<\/p>\n<p>The technology combines several novel features:<\/p>\n<ul>\n<li>Large area fabrication without complex lithography, which is an expensive patterning method<\/li>\n<li>Reversible color change<\/li>\n<li>Precise control over dynamically customizable color<\/li>\n<li>Broad dynamic range that spans a large portion of visible color space<\/li>\n<\/ul>\n<p>Earlier methods of developing structural color often relied on expensive electrochromic materials, mechanical actuation or photonic crystals, all of which are hindered by limited tunability, complex fabrication steps, lithographic patterning requirements and angular sensitivity. Achieving dynamic color switching in the visible range remains a significant challenge.<\/p>\n<p>\u201cThe reliance on angle-dependent resonances or patterned nanostructures limits practical integration and scalability,\u201d Chanda says. \u201cOvercoming these barriers is critical for advancing tunable structural color platforms toward real-world applications in flexible electronics, displays and wearable systems.\u201d<\/p>\n<p>This new method can be used for creating large textiles, complex surfaces, and temperature-sensitive consumer product labeling.<\/p>\n<h2>Mimicking Nature for Dynamic Colors<\/h2>\n<p>The design draws inspiration from animals like octopuses, which change color by rearranging tiny structures in their skin rather than producing new pigments.<\/p>\n<p>Chanda\u2019s team created a layered design that can change color without being affected by viewing angle or direction of the incident light. It uses a very thin layer of VO\u2082, a material that changes phase from semiconductor to metal with temperature, placed on top of a thick aluminum layer to form a resonating cavity to trap and reflect light in a controlled way.<\/p>\n<p>Pigment colorants control light absorption through a material\u2019s electronic properties, which means each color needs a new molecule and isn\u2019t affected by the surrounding environment. Structural colorants, like those found in octopuses, work differently: they control the way light is reflected, scattered or absorbed based on the geometrical arrangement of nanostructures, making them sensitive to changes in their surroundings.<\/p>\n<p>\u201cHarnessing the reversible phase transition, the platform offers precise control over dynamically tunable color, opening avenues for applications in temperature sensing, displays, tunable colored fabrics and many other consumer products,\u201d Chanda says.<\/p>\n<p>The bilayer structure is made using magnetron sputtering to deposit the phase-change material, a process that uses plasma to deposit thin film. It also uses electron-beam deposition to deposit the metal layer, which melts material with a focused electron beam to create precise coatings. This combination allows the structure to be applied to flexible substrates, making it suitable for large-scale production and wearable applications.<\/p>\n<h2>Looking Ahead<\/h2>\n<p>Chanda says the next steps of the project include further exploration of color space and roll-to-roll fabrication to improve its viability as a commercial and defense-related platform.<\/p>\n<p>\u201cThis platform holds promise for a robust, scalable and dynamically tunable coloration platform with broad applicability, while demonstrating a proof-of-concept product that highlights its commercial and defense-related application potentials,\u201d Chanda says.<\/p>\n<p><strong>Licensing Opportunity<\/strong><\/p>\n<p>For more information about licensing this technology, visit <a href=\"http:\/\/tt.research.ucf.edu\/\">麻豆原创\u2019s Office of Technology Transfer<\/a>.<\/p>\n<p><strong>Researcher Credentials<\/strong><\/p>\n<p>Chanda has joint appointments in 麻豆原创\u2019s NanoScience Technology Center, the Department of Physics, and the <a href=\"https:\/\/www.ucf.edu\/college\/optics-photonics\/\">College of Optics and Photonics<\/a>. He received his doctoral degree in photonics from the University of Toronto and completed a postdoctoral fellowship at the University of Illinois at Urbana-Champaign. He joined 麻豆原创 in Fall 2012.<\/p>\n<p><em>This material is based upon work supported by the NSF Grant no. ECCS-1920840 and NGA Grant no. HM0476-20-1-0010. <\/em><em>Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the NSF\/NGA.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new technology developed by Professor Debashis Chanda allows materials to change color on demand, with potential applications in camouflage, textiles, thermal sensing, reconfigurable displays and more.<\/p>\n","protected":false},"author":98,"featured_media":150535,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"lazy_load_responsive_images_disabled":false,"footnotes":"","_links_to":"","_links_to_target":"","_wp_rev_ctl_limit":""},"categories":[23,24],"tags":[981,11131,3279,3488,202],"tu_author":[],"class_list":["post-150534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research","category-science-technology","tag-college-of-optics-and-photonics","tag-debashis-chanda","tag-nanoscience-technology-center","tag-office-of-technology-transfer","tag-alumni"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>麻豆原创 Researcher Creates Color-Changing, Tunable Photonic Material Inspired by Nature | 麻豆原创 News<\/title>\n<meta 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