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Chiroptically Active Multi-Modal Calcium Carbonate-Based Nanocomposites.

Fearghal C Donnelly^1,2, Finn Purcell-Milton³, Eoin Caffrey⁴

¹School of Chemistry, Trinity College Dublin, D02 PN40 Dublin, Ireland.

Nanomaterials (Basel, Switzerland)

|January 11, 2024

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Researchers developed novel multimodal chiroptically active calcium carbonate (CaCO3) nanocomposites. These versatile materials offer tunable luminescence for diverse applications in optics and sensing.

Area of Science:

Materials Science
Nanotechnology
Optics

Background:

Multimodal nano- and micro-structures are gaining research interest due to their combined properties.
Combining functionalities in single structures offers opportunities in biomedicine, sensing, catalysis, and optics.

Purpose of the Study:

To synthesize and characterize novel multimodal chiroptically active calcium carbonate (CaCO3) nanocomposites.
To introduce tunable luminescence by incorporating quantum dots or doping with ions.

Main Methods:

Modified microemulsion method using cysteine to create chiral CaCO3 nanocomposites.
Incorporation of CuInZnS/ZnS or CdSe@ZnS/ZnS core/shell quantum dots for luminescence.
Doping with trivalent europium (Eu3+) ions for luminescence.

Keywords:

calcium carbonate chiroptical activity core–shell nanostructures photoluminescence quantum dots

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Main Results:

Successfully synthesized chiroptically active CaCO3 nanocomposites.
Achieved tunable luminescence in orange, green, and red colors.
Demonstrated the ability to incorporate nanoparticles and ions for specific functionalities.

Conclusions:

The developed CaCO3 nanocomposites are a new class of chiroptically active materials.
This approach offers tunable functionality for specific requirements.
The multimodal nanocomposites show significant potential in various optical applications and sensing.