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Fluorescence Sensing with Molecularly Imprinted Polymer-Capped Quantum Dots.

Hanieh Montaseri1,2, Heidi Abrahamse3, Patricia B C Forbes4

  • 1Faculty of Health Sciences, Laser Research Centre, University of Johannesburg, Doornfontein, South Africa. Montaseri.hanieh@gmail.com.

Methods in Molecular Biology (Clifton, N.J.)
|August 19, 2021
PubMed
Summary

This study details a novel fluorescence sensor using molecularly imprinted polymer-capped quantum dots (MIP@QDs). These nanoparticles offer enhanced optical properties for detecting analytes like pharmaceuticals and polycyclic aromatic hydrocarbons (PAHs).

Keywords:
Cross-linkerFluorescence sensingFunctional monomerMolecularly imprinted polymerQuantum dotSol-gel approachSurface imprinting polymerization

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Area of Science:

  • Nanotechnology
  • Analytical Chemistry
  • Materials Science

Background:

  • Quantum dots (QDs) possess excellent optical properties, including high quantum yield and photoluminescence efficiency, making them suitable for sensing applications.
  • Molecularly imprinted polymers (MIPs) can be designed for selective recognition of specific analytes.
  • Combining QDs with MIPs can create highly sensitive and selective fluorescence sensors.

Purpose of the Study:

  • To describe the design and synthesis of a fluorescence sensor based on molecularly imprinted polymer-capped quantum dots (MIP@QDs).
  • To evaluate the suitability of spherical and monodispersed MIP@QDs for fluorescence sensing of analytes such as pharmaceuticals and polycyclic aromatic hydrocarbons (PAHs).
  • To present the optimization of sensor variables and demonstrate analytical applications.

Main Methods:

  • Synthesis of quantum dots (QDs) with desirable optical properties.
  • Development of molecularly imprinted polymer (MIP) shells on QD surfaces to create MIP@QDs.
  • Characterization of MIP@QDs for size, morphology, and optical properties.
  • Optimization of experimental parameters for fluorescence sensing.
  • Application of the MIP@QD sensor for detecting target analytes.

Main Results:

  • Successful synthesis of spherical and monodispersed MIP@QDs.
  • Demonstration of excellent optical properties, high quantum yield, and photoluminescence efficiency of the MIP@QDs.
  • Effective fluorescence sensing of analytes like pharmaceuticals and polycyclic aromatic hydrocarbons (PAHs) using the developed sensor.
  • Optimization of sensor variables leading to improved sensitivity and selectivity.

Conclusions:

  • The developed MIP@QD fluorescence sensor exhibits significant advantages for analyte detection.
  • The sensor's properties are valuable for fluorescence sensing of pharmaceuticals and PAHs.
  • Further optimization and application of this sensor technology hold promise for advanced analytical chemistry.