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Related Concept Videos

Photoluminescence: Fluorescence and Phosphorescence01:23

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Related Experiment Video

Updated: Dec 20, 2025

A Step Beyond BRET: Fluorescence by Unbound Excitation from Luminescence FUEL
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Bioluminescence-Based Energy Transfer Using Semiconductor Quantum Dots as Acceptors.

Anirban Samanta1, Igor L Medintz2

  • 1Ramakrishna Mission Vidyamandira, Belur Math, Howrah 711202, India.

Sensors (Basel, Switzerland)
|May 28, 2020
PubMed
Summary
This summary is machine-generated.

Bioluminescence resonance energy transfer (BRET) using quantum dots (QDs) offers enhanced bioimaging and biosensing without external light. This approach improves signal-to-noise ratios but requires further development for clinical applications.

Keywords:
BRETFRETbioluminescencebiosensingluciferasequantum dot

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Area of Science:

  • Biophysics
  • Nanotechnology
  • Biochemistry

Background:

  • Bioluminescence resonance energy transfer (BRET) is a non-radiative energy transfer process.
  • BRET utilizes a bioluminescent donor and a fluorophore acceptor, differing from Förster resonance energy transfer (FRET) by biochemical donor excitation.
  • Renilla luciferase is a common BRET donor, catalyzing substrate oxidation to excite the donor.

Purpose of the Study:

  • To explore the application of semiconductor quantum dots (QDs) as acceptors in BRET systems.
  • To highlight the advantages of QD-BRET for bioimaging and biosensing.
  • To identify challenges in QD-BRET for translational research.

Main Methods:

  • Utilizing semiconductor quantum dots (QDs) as fluorescent acceptors in BRET.
  • Leveraging the photophysical properties of QDs, such as their large Stokes shift.
  • Employing BRET systems that do not require external optical illumination.

Main Results:

  • QD-BRET systems offer improved signal-to-noise ratios by eliminating background auto-fluorescence.
  • The large Stokes shift of QDs facilitates accurate deconstruction of the acceptor signal.
  • QD-BRET shows promise for non-invasive bioimaging and sensitive biosensing applications.

Conclusions:

  • QD-BRET presents significant advantages over traditional BRET systems using organic dyes or fluorescent proteins.
  • The absence of external illumination in QD-BRET enhances imaging and sensing capabilities.
  • Further research is needed to overcome existing challenges for the clinical translation of QD-BRET technology.