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Related Concept Videos

Channel Rhodopsins01:11

Channel Rhodopsins

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
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Gold Nanorod-assisted Optical Stimulation of Neuronal Cells
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Chiroptically active quantum nanonails.

Finn Purcell-Milton1,2, Vera A Kuznetsova1, Xue Bai1

  • 1School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, Dublin, Ireland. finn.purcellmilton@tudublin.ie.

Nanoscale Horizons
|April 10, 2024
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Summary
This summary is machine-generated.

Researchers developed a novel

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Area of Science:

  • Materials Science and Nanotechnology
  • Quantum-Confined Nanostructures
  • Semiconductor Heterostructures

Background:

  • CdSe/CdS quantum-confined nanostructures exhibit unique properties influenced by morphology.
  • Understanding structure-property relationships is crucial for nanomaterial development.

Purpose of the Study:

  • To report a new 'nanonail' morphology of CdSe/CdS core-shell heterostructures.
  • To investigate the tuneability, photoluminescent properties, and chiroptical activity of this new morphology.
  • To evaluate the biological activity and enantioselectivity of chiral nanostructures.

Main Methods:

  • Synthesis of CdSe/CdS core-shell heterostructures with a 'nanonail' morphology.
  • Characterization of structural and photoluminescent properties.
  • Ligand exchange to induce chiroptical activity.
  • Cellular uptake and cytotoxicity assays on A549 cancer cells.
  • Analysis of Förster Resonance Energy Transfer (FRET) on monolayers.

Main Results:

  • A novel 'nanonail' morphology of CdSe/CdS heterostructures was synthesized, featuring tuneable dimensions and exceptional photoluminescence.
  • Chiroptical activity was successfully induced via ligand exchange, dependent on morphology, shell thickness, and chiral ligand concentration.
  • Significant enantioselectivity in cellular uptake and cytotoxicity was observed in human lung cancer cells (A549).
  • Monolayer analysis confirmed the absence of FRET processes.

Conclusions:

  • The 'nanonail' CdSe/CdS heterostructure represents a tuneable nanomaterial with significant potential.
  • Ligand-induced chirality is effectively controlled by structural parameters and ligand concentration.
  • The observed enantioselectivity in biological activity highlights potential applications in targeted therapies.
  • Absence of FRET suggests suitability for applications requiring minimal energy transfer between adjacent nanostructures.