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Related Experiment Video

Updated: Feb 26, 2026

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

Multicolor Functional Carbon Dots via One-Step Refluxing Synthesis.

Ting-Yi Wang¹, Chong-You Chen¹, Chang-Ming Wang¹

¹Department of Chemistry, National Taiwan University , Taipei 10617, Taiwan.

|July 21, 2017

Summary

Researchers developed a simple method to create multi-colored carbon dots (CDs) for sensing applications. These fluorescent nanomaterials offer a convenient and sensitive route for detecting various target molecules.

Keywords:

carbon dots fluorometric sensors inner filter effect multicolor refluxing synthesis

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Published on: April 1, 2013

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Last Updated: Feb 26, 2026

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

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Published on: July 10, 2017

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Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes

Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes

Published on: April 1, 2013

Area of Science:

Nanomaterials Science
Analytical Chemistry
Biochemistry

Background:

Carbon dots (CDs) are versatile fluorescent nanomaterials with desirable properties like low cost, high photostability, and excellent biocompatibility.
Conventional methods often yield single-colored CDs, necessitating separate syntheses for diverse optical applications.
Developing facile methods for tunable, multi-colored CDs is crucial for advanced sensing technologies.

Purpose of the Study:

To develop a one-step synthesis for producing carbon dots with tunable emission colors.
To utilize these multi-colored carbon dots as sensing probes employing the spectrofluorometric inner filter effect.
To demonstrate the versatility of carbon dot-based sensors for detecting various target molecules.

Main Methods:

One-step refluxing process to synthesize carbon dots.
Tuning fluorescence emission color by adjusting sodium hydroxide content in the precursor solution.
Spectrofluorometric inner filter effect utilized for target molecule detection, including direct, metal nanoparticle-assisted, and enzymatic reaction-supported strategies.

Main Results:

Successfully synthesized carbon dots with tunable emission colors via a facile one-step method.
Demonstrated three distinct sensing strategies using carbon dots and the inner filter effect.
Achieved comparable sensitivity in detecting caffeine, melamine, and fenitrothion with a simplified preparation route.

Conclusions:

A facile and tunable synthesis of multi-colored carbon dots is achievable through a one-step refluxing process.
Carbon dot-based sensors utilizing the inner filter effect offer a convenient and sensitive platform for analyte detection.
This approach provides a promising strategy for developing multifunctional nanosensors with simplified fabrication.