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Published on: February 25, 2017
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Carbon Dot Synthesis in CYTOP Optical Fiber Using IR Femtosecond Laser Direct Writing and Its Luminescence Properties
Ruyue Que1, Jean-Frédéric Audibert1, Enrique Garcia-Caurel2
1CNRS, ENS Paris-Saclay, CentraleSupélec, LuMIn, Université Paris-Saclay, 91190 Gif-sur-Yvette, France.
Nanomaterials (Basel, Switzerland)
|June 13, 2024
Summary
Researchers developed a simple laser method to create oxygen-insensitive luminescent carbon dots within CYTOP fibers. These carbon dots exhibit broad excitation and emission, showing potential for advanced display and data storage applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Carbon dots (CDs) are versatile nanomaterials with unique optical properties.
- Photoluminescence (PL) in CDs offers potential for various optoelectronic applications.
- Integrating CDs into polymer fibers requires efficient and controlled synthesis methods.
Purpose of the Study:
- To synthesize luminescent carbon dots (CDs) within CYTOP fibers using a novel laser-based technique.
- To characterize the optical properties, including excitation/emission spectra and luminescence lifetime, of the synthesized CDs.
- To investigate the influence of laser parameters on CD formation and properties, and assess their stability.
Main Methods:
- Utilized infrared femtosecond laser direct writing (FLDW) as a post-treatment for pristine CYTOP fibers.
- Analyzed photoluminescence (PL) properties using excitation/emission matrices and spectra across UV/visible ranges.
- Measured spatially resolved luminescence lifetime during and after laser irradiation.
Main Results:
- Successfully synthesized luminescent CDs within CYTOP fibers, forming ellipsoid voids with CDs at the periphery.
- Identified at least three distinct luminescent species with broad excitation (UV to green) and emission (blue to red).
- Demonstrated that laser power and dose control the quantity and ratio of luminescent CD species.
- Observed spatially varying luminescence lifetimes, with longer lifetimes at the periphery (~2 ns dominant).
- Confirmed oxygen insensitivity of the laser-induced CDs.
Conclusions:
- Femtosecond laser direct writing (FLDW) provides a facile, one-step method for in-situ synthesis of luminescent carbon dots in CYTOP fibers.
- The synthesized CDs exhibit tunable, broad-spectrum luminescence and oxygen insensitivity.
- These properties make laser-induced carbon dots in fibers promising for applications in displays and data storage.
