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A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
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Hemoglobin detection using carbon dots as a fluorescence probe.

Ali Barati1, Mojtaba Shamsipur2, Hamid Abdollahi3

  • 1Department of Chemistry, Razi University, Kermanshah, Iran; Faculty of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran.

Biosensors & Bioelectronics
|May 20, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a novel fluorescence probe using carbon dots (CDs) for sensitive hemoglobin (Hb) detection. The method leverages the reaction between Hb and H2O2 to enhance Hb quantification in human blood samples.

Keywords:
Carbon dotsFluorescence probeFree radicalsHemoglobinInner filter effect

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Materials Science

Background:

  • Hemoglobin (Hb) quantification is crucial for diagnosing various medical conditions.
  • Existing methods for Hb detection can be complex or lack sensitivity.
  • Carbon dots (CDs) offer unique fluorescent properties for sensing applications.

Purpose of the Study:

  • To develop a simple, sensitive, and selective fluorescence probe for Hb determination.
  • To utilize unmodified high fluorescent carbon dots (CDs) for Hb sensing.
  • To investigate the role of hydrogen peroxide (H2O2) in enhancing Hb detection sensitivity.

Main Methods:

  • Employing carbon dots (CDs) as a fluorescence probe.
  • Utilizing the inner filter effect (IFE) of Hb on CDs' fluorescence.
  • Leveraging the reaction of Hb with H2O2 to generate reactive oxygen species (ROS) for enhanced fluorescence quenching.

Main Results:

  • The developed probe demonstrated sensitive and selective detection of Hb.
  • Hb detection was achieved in the concentration range of 1-100 nM with a low detection limit of 0.4 nM.
  • The method was successfully validated using human blood samples.

Conclusions:

  • Unmodified carbon dots serve as an effective fluorescence probe for Hb detection.
  • The H2O2-mediated reaction significantly enhances the sensitivity of Hb quantification.
  • This approach offers a promising tool for clinical Hb analysis.