Tuning the Structural Color of a 2D Photonic Crystal Using a Bowl-like Nanostructure
| Autor: | Su Young Lee, Sungju Yu, Jongheop Yi, Yong Hwa Kim, Ha Nee Umh |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Nanostructure
Materials science business.industry Anodizing Bragg's law Nanotechnology Ranging 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Optoelectronics General Materials Science Photonics 0210 nano-technology business Structural coloration Voltage Photonic crystal |
| Zdroj: | ACS Applied Materials & Interfaces. 8:15802-15808 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.6b03717 |
| Popis: | Structural colors of the ordered photonic nanostructures are widely used as an effective platform for manipulating the propagation of light. Although several approaches have been explored in attempts to mimic the structural colors, improving the reproducibility, mechanical stability, and the economic feasibility of sophisticated photonic crystals prepared by complicated processes continues to pose a challenge. In this study, we report on an alternative, simple method for fabricating a tunable photonic crystal at room temperature. A bowl-like nanostructure of TiO2 was periodically arranged on a thin Ti sheet through a two-step anodization process where its diameters were systemically controlled by changing the applied voltage. Consequently, they displayed a broad color distribution, ranging from red to indigo, and the principal reason for color generation followed the Bragg diffraction theory. This noncolorant method was capable of reproducing a Mondrian painting on a centimeter scale without the need to employ complex architectures, where the generated structural colors were highly stable under mechanical or chemical influence. Such a color printing technique represents a potentially promising platform for practical applications for anticounterfeit trademarks, wearable sensors, and displays. |
| Databáze: | OpenAIRE |
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