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Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
Published on: August 7, 2016
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Dual-channel-coded microbeads for multiplexed detection of biomolecules using assembling of quantum dots and element
Bangrong Lu1, Qinghua He2, Yonghong He2
1School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, People's Republic of China.
Analytica Chimica Acta
|May 20, 2018
Summary
This study introduces novel dual-channel microbeads using quantum dots (QDs) and element coding nanoparticles (ECNPs) for enhanced bioanalysis. These microbeads offer multiplexed detection with high sensitivity and specificity.
Area of Science:
- Nanotechnology
- Biotechnology
- Analytical Chemistry
Background:
- Multiplexed bioanalysis requires highly specific and sensitive detection methods.
- Current microbead technologies face limitations in encoding capacity and recognition accuracy.
Purpose of the Study:
- To develop dual-channel microbeads for enhanced multiplexed bioanalysis.
- To improve encoding capacity and recognition accuracy in microbead-based assays.
Main Methods:
- Fabrication of microbeads incorporating quantum dots (QDs) and element coding nanoparticles (ECNPs).
- Utilizing dual-spectra: QD fluorescence and laser-induced breakdown spectroscopy (LIBS) from ECNPs (AgO, MgO, ZnO).
- Demonstrating dual-channel decoding and multiplexed analysis using anti-immunoglobulin G (anti-IgG).
Main Results:
- Single microbeads were successfully decoded in two distinct optical channels.
- Multiplexed analysis and anti-IgG adsorption experiments confirmed the microbeads' availability and specificity.
- Linear concentration response to anti-IgG was observed from 3.125 × 10-10 M to 1 × 10-8 M.
- A limit of detection (LOD) of 2.91 × 10-11 M for anti-IgG was achieved.
Conclusions:
- Dual-channel-coded microbeads offer a promising platform for advanced bioanalytical applications.
- The combination of QD fluorescence and LIBS enhances encoding capacity and recognition precision.
- This technology demonstrates significant potential for sensitive and specific detection of target biomolecules.
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