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Surface plasmon effect of carbon nanodots
Deng-Yang Guo1, Chong-Xin Shan, Kai-Kai Liu
1State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China. shancx@ciomp.ac.cn.
Nanoscale
|November 3, 2015
Summary
Introducing carbon nanodots greatly enhances zinc oxide quantum dot (QD) fluorescence intensity while significantly reducing their fluorescence lifetime. This effect is attributed to the surface plasmon resonance of the carbon nanodots.
Area of Science:
- Materials Science
- Nanotechnology
- Quantum Chemistry
Background:
- Zinc oxide quantum dots (ZnO QDs) exhibit luminescence properties.
- Carbon nanodots (CNDs) are novel carbon nanomaterials with unique optical properties.
Purpose of the Study:
- To investigate the effect of introducing carbon nanodots on the luminescence of zinc oxide quantum dots.
- To understand the underlying mechanism responsible for observed photoluminescence changes.
Main Methods:
- Preparation of luminescent ZnO quantum dots.
- Introduction of carbon nanodots to the ZnO QD system.
- Characterization of photoluminescence intensity and fluorescence lifetime.
- Calculation of surface plasmon resonance frequency for carbon nanodots.
Main Results:
- A significant increase in fluorescence intensity of ZnO QDs was observed upon the addition of CNDs.
- A notable decrease in the fluorescence lifetime of ZnO QDs was measured.
- The observed fluorescence enhancement and lifetime decrement were attributed to the surface plasmon effect of CNDs.
- Calculated surface plasmon resonance frequency of CNDs showed good agreement with the fluorescence spectrum of ZnO QDs.
Conclusions:
- Carbon nanodots can effectively enhance the photoluminescence of ZnO quantum dots.
- The surface plasmon effect of CNDs plays a crucial role in modulating the optical properties of ZnO QDs.
- This synergistic interaction opens possibilities for novel optoelectronic applications.
