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Biocompatible and fluorescent water based NIR emitting CdTe quantum dot probes for biomedical applications
Asha Kumari1, Arun Sharma2, Rahul Sharma3
1Nanotechnology Laboratory, Department of Physics and Materials Science, Jaypee University of Information Technology, Waknaghat, Solan 173234, India; Department of Chemistry, Career Point University, Hamirpur 176041, India.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|December 4, 2020
Summary
Near-infrared-emitting (NIR) cadmium telluride (CdTe) quantum dots (QDs) show excellent deep-tissue light penetration. These QDs demonstrate promising biocompatibility and antimicrobial activity, making them suitable for bioimaging applications.
Area of Science:
- Materials Science
- Biotechnology
- Nanotechnology
Background:
- Near-infrared-emitting (NIR) quantum dots (QDs) offer advantages for deep-tissue imaging due to superior light penetration.
- Cadmium telluride (CdTe) QDs are synthesized using aqueous methods with 3-mercaptopropionic acid (3-MPA) for stability.
- Encapsulation of QDs is crucial for mitigating potential toxicity and enhancing biocompatibility.
Purpose of the Study:
- To investigate the fluorescent characteristics, cytotoxicity, and antimicrobial activity of NIR-emitting CdTe QDs.
- To evaluate the potential of these QDs for bioimaging and distribution applications.
- To assess the efficacy of polymer encapsulation in improving QD safety and performance.
Main Methods:
- Synthesis of NIR-emitting CdTe QDs using an aqueous method with 3-MPA stabilization.
- Cytotoxicity studies to assess the safety and biocompatibility of the synthesized QDs.
- Antimicrobial assays to determine the effects of QDs on bacterial strains, measuring zones of inhibition.
Main Results:
- The synthesized CdTe QDs exhibit proficient fluorescent characteristics suitable for NIR applications.
- Cytotoxicity studies confirmed that polymer encapsulation effectively mitigates the toxic effects of the QDs.
- Antimicrobial studies demonstrated significant toxic effects against bacterial strains, with a maximum inhibition zone of 26 mm.
Conclusions:
- NIR-emitting CdTe QDs possess attractive optical properties and can potentially replace conventional fluorescent probes.
- Polymer-encapsulated CdTe QDs show improved biocompatibility and can be easily modified for biological environments.
- These QDs hold promise for advanced bioimaging and therapeutic applications due to their fluorescence and antimicrobial properties.
