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Multifunctional Reversible Fluorescent Controller Based on a One-Dimensional Photonic Crystal.

Yuxin Wu1, Huaizhong Shen1, Shunsheng Ye1

  • 1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China.

ACS Applied Materials & Interfaces
|September 28, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel solid fluorescent controller using a one-dimensional photonic crystal and CdSe. This device allows tunable fluorescence intensity and wavelength modulation, offering a versatile platform for advanced optical applications.

Keywords:
fluorescent controllermultifunctionalone-dimensional photonic crystalpH responsivequantum dots

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Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Developing advanced fluorescent controllers is crucial for applications in sensing and optical devices.
  • Existing fluorescent controllers often face limitations in material selection and tunability.
  • A need exists for versatile and robust solid-state fluorescent control systems.

Purpose of the Study:

  • To fabricate a multifunctional solid fluorescent controller by separating a one-dimensional photonic crystal (1DPC) and a CdSe fluorescent layer.
  • To demonstrate tunable fluorescence enhancement/weakening and reversible intensity modulation based on environmental pH.
  • To explore the modulation of fluorescent wavelength and spectral width using the photonic stop band.

Main Methods:

  • Fabrication of a layered structure with a 1DPC and CdSe fluorescent layer on quartz substrates.
  • Utilizing finite-difference time-domain (FDTD) simulations to confirm the mechanism of fluorescent variation.
  • Investigating the effect of excitation light direction and pH changes on fluorescence properties.

Main Results:

  • Achieved controllable fluorescence enhancement and weakening by varying excitation light direction.
  • Demonstrated reversible fluorescence intensity modulation with environmental pH changes, distinct from quenching modes.
  • Confirmed the tunability of fluorescent wavelength and full width at half-maximum (FWHM) by overlapping the photonic stop band with CdSe emission.

Conclusions:

  • The separated structure facilitates independent material selection for the 1DPC and fluorescent layers.
  • The developed device offers a universal strategy for fabricating tunable solid fluorescent controllers.
  • The pH-responsive 1DPC enables adjustable fluorescent control based on specific application needs.