Pseudomorphic synthesis of monodisperse afterglow carbon dot-doped SiO2 microparticles for photonic crystals

Xue Chen, Yu Wang, Chenxi Peng, Wenbo Hu, Zhongbin Wu, Weidong Xu, Suli Wu, Zhi Luo, Yung Doug Suh, Timur Sh Atabaev, Xiyan Li, Xiaowang Liu, Wei Huang

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number2307198
JournalAdvanced Materials
Volume35
DOIs
Publication statusPublished - Nov 28 2023

Keywords

  • afterglow nanoparticles
  • carbon dots
  • photonic crystals

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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