Pseudomorphic Synthesis of Monodisperse Afterglow Carbon Dot-Doped SiO2 Microparticles for Photonic Crystals
Chen X. Wang Y. Peng C. Hu W. Wu Z. Xu W. Wu S. Luo Z. Suh Y.D. Atabaev T.S. Li X. Liu X. Huang W.
28 November 2023John Wiley and Sons Inc
Advanced Materials
2023#35Issue 48
Synthesizing monodisperse afterglow microparticles (MPs) is crucial for creating photonic crystal (PC) platforms with multiple optical states for optoelectronics. However, achieving high uniformity in both size and morphology is challenging for inorganic afterglow MPs using conventional methods. In this contribution, a novel approach for the synthesis of carbon dot (CD)-doped SiO2 MPs with tunable afterglow properties and size distributions is reported. These mechanism studies suggest that the pseudomorphic transformation of SiO2 MPs enables CD doping, providing a hydrogen bond-enriched environment for triplet state stabilization, which generates green afterglow while retaining the uniformity in size and morphology of the parent SiO2 MPs. Furthermore, the utility of CD-doped SiO2 MPs in the fabrication of rationally designed PC patterns is shown using a combined consecutive dip-coating and laser-assisted etching strategy. The pattern displays multiple optical responses under different lighting conditions, including angle-dependent structural colors and blue luminescence under daylight and upon 365-nm irradiation, respectively, as well as time-dependent green afterglow after ceasing UV excitation. The findings pave the way for further controlling the dynamics of spontaneous emissions by PCs to enable complicated optical states for advanced photonics.
afterglow nanoparticles , carbon dots , photonic crystals
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Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Shaanxi Key Laboratory of Flexible Electronics, Xian Key Laboratory of Flexible Electronics, Xian Key Laboratory of Biomedical Materials & Engineering, Xian Institute of Flexible Electronics, Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, Shaanxi, Xian, 710072, China
State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2nd Linggong Road, Dalian, 116024, China
Department of Biomedical Engineering, Southern University of Science and Technology, Guangdong, Shenzhen, 518055, China
Department of Chemistry and School of Energy and Chemical Engineering UNIST, Ulsan, 44919, South Korea
Department of Chemistry, Nazarbayev University, Astana, 010000, Kazakhstan
Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts &Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing, 211816, China
Frontiers Science Center for Flexible Electronics (FSCFE)
State Key Laboratory of Fine Chemicals
Department of Biomedical Engineering
Department of Chemistry and School of Energy and Chemical Engineering UNIST
Department of Chemistry
Institute of Photoelectronic Thin Film Devices and Technology
Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
Key Laboratory of Flexible Electronics (KLOFE)
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