Carbon dots: materials, synthesis, properties and approaches to long-wavelength and multicolor emission

2017 ◽  
Vol 5 (21) ◽  
pp. 3794-3809 ◽  
Author(s):  
Zhu Lian Wu ◽  
Ze Xi Liu ◽  
Yun Huan Yuan
Keyword(s):  
Energy Transfer ◽  
Surface State ◽  
Carbon Dots ◽  
Raw Materials ◽  
Chemical Doping ◽  
Materials Synthesis ◽  
Long Wavelength ◽  
Synthesis Properties ◽  
Size Controlled

In this mini review, we briefly summarized the raw materials, synthesis and typical properties of CDs and ways to realize long-wavelength and multicolor emission including surface state and size controlled by synthesis strategies, proper precursors, chemical doping and modification, solvatochromic effects and energy transfer.

scholarly journals Synthesis of Multicolor Carbon Dots Based on Solvent Control and Its Application in the Detection of Crystal Violet

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1556 ◽  
Author(s):  
Zhao ◽  
Liu ◽  
Zhang ◽  
Zhang ◽  
Liao ◽  
...  
Keyword(s):  
Crystal Violet ◽  
Carbon Dots ◽  
Raw Materials ◽  
Quantum Yields ◽  
Characterization Methods ◽  
Long Wavelength ◽  
Solvent Control ◽  
Effective Synthesis ◽  
One Step ◽  
20 Nm

The adjustment of the emitting wavelength of carbon dots (CDs) is usually realized by changing the raw materials, reaction temperature, or time. This paper reported the effective synthesis of multicolor photoluminescent CDs only by changing the solvent in a one-step solvothermal method, with 1,2,4,5-tetraaminobenzene as both the novel carbon source and nitrogen source. The emission wavelengths of the as-prepared CDs ranged from 527 to 605 nm, with quantum yields (QYs) reaching 10.0% to 47.6%, and it was successfully employed as fluorescence ink. The prepared red-emitting CDs (R-CDs, λem = 605 nm) and yellow-emitting CDs (Y-CDs, λem = 543 nm) were compared through multiple characterization methods, and their luminescence mechanism was studied. It was discovered that the large particle size, the existence of graphite Ns, and oxygen-containing functional groups are beneficial to the formation of long wavelength-emitting CDs. Y-CDs responded to crystal violet, and its fluorescence could be quenched. This phenomenon was thus employed to develop a detection method for crystal violet with a linear range from 0.1 to 11 µM and a detection limit of 20 nM.

Tuning Optical Properties of Nitrogen-Doped Carbon Dots Through Fluorescence Resonance Energy Transfer Using Rhodamine B for Ratiometric Sensing of Mercury ion

2021 ◽  
Author(s):  
Alagan Muthurasu ◽  
V GANESH
Keyword(s):  
Optical Properties ◽  
Energy Transfer ◽  
Rhodamine B ◽  
Carbon Dots ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Nitrogen Doped ◽  
Physical Chemical ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Carbon dots (CDs) exhibiting fluorescence property are generally derived from carbonaceous materials and possessing ultra small size with various exciting physical, chemical and photo-properties that have been used in many...

Fluorescence resonance energy transfer monitoring of pH-responsive doxorubicin release from carbon dots/aptamer functionalized magnetic mesoporous silica

Nanomedicine ◽  
2021 ◽  
Author(s):  
Abolghasem Abbasi Kajani ◽  
Masoud Ayatollahi Mehrgardi
Keyword(s):  
Drug Delivery ◽  
Energy Transfer ◽  
Fluorescence Resonance Energy Transfer ◽  
Carbon Dots ◽  
Drug Loading ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Spectroscopic Techniques ◽  
Ph Responsive ◽  
Fluorescence Resonance

Aim: To develop a novel theranostic nanoplatform for simultaneous fluorescent monitoring and stimuli-triggered drug delivery. Materials & methods: Different microscopic and spectroscopic techniques were used for the characterization of nanocarriers. MCF-7 and human umbilical vein endothelial cell lines were cultured and treated with different doses of doxorubicin-loaded nanocarriers. The cell viability and drug release were studied using MTT assay and fluorescence microscopy. Results: Biocompatible and mono-disperse nanocarriers represent hollow and mesoporous structures with the calculated surface area of 552.83 m2.g-1, high magnetic activity (12.6 emu.g-1), appropriate colloidal stability and high drug loading capacity (up to 61%). Conclusion: Taxane-based carbon dots act as the pH-responsive gatekeepers for the controlled release of doxorubicin into cancer cells and provide a fluorescence resonance energy transfer system for real-time monitoring of drug delivery.

Sign in / Sign up

Export Citation Format

Share Document