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Atomic Oxygen Tailored Graphene Oxide Nanosheets Emissions for Multicolor Cellular Imaging
Qingsong Mei1, Jian Chen1, Jun Zhao2
1School of Medical Engineering, Hefei University of Technology , Hefei, Anhui 230009, China.
ACS Applied Materials & Interfaces
|March 2, 2016
Summary
Researchers developed a new method to control graphene oxide (GO) fluorescence colors from brown to cyan. This simple chemical process enhances GO
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Graphene oxide (GO) is primarily known as a fluorescence quencher.
- Controlling the specific luminescent properties and emission colors of GO has been challenging due to its structural heterogeneity.
Purpose of the Study:
- To demonstrate a novel chemical oxidative strategy for tuning graphene oxide (GO) emission colors.
- To achieve precise control over GO fluorescence from brown to cyan without altering the excitation wavelength.
Main Methods:
- A chemical oxidative strategy involving GO nanosheets treated in piranha solution.
- Varying reaction times in the piranha solution to control oxidation and structural changes.
- Characterization of changes in oxygen content, nanosheet size, and sp2 conjugation.
Main Results:
- Successfully tuned GO luminescence colors from brown to yellow, green, and cyan by adjusting reaction times.
- Observed an increase in oxygen content and emissive carbon cluster-like states with longer reaction times.
- Enhanced fluorescent quantum yields of the GO nanosheets.
- Avoided complex separation procedures like chromatography.
Conclusions:
- The developed method offers a simple and effective way to precisely control GO fluorescence colors.
- Multicolored fluorescent GO nanosheets have potential applications in cellular imaging and multiplex encoding analysis.
