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Updated: Jun 22, 2026

A Multimodal Imaging Framework to Advance Phenotyping of Living Label-free Breast Cancer Cells
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Raman imaging of floating cells.

Caitriona Creely, Giovanni Volpe, Gajendra Singh

    Optics Express
    |June 6, 2009
    PubMed
    Summary

    Holographic optical tweezers enable Raman spectroscopy for live cells in suspension, overcoming previous limitations. This breakthrough allows for detailed biochemical analysis of individual suspended cells.

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    Area of Science:

    • Biomedical Optics
    • Cellular Spectroscopy
    • Biochemical Imaging

    Background:

    • Raman imaging provides spatially resolved biochemical information from living cells.
    • Acquiring space-resolved spectra from suspended cells is challenging due to immobilization difficulties.

    Purpose of the Study:

    • To overcome the challenge of immobilizing cells in suspension for Raman spectroscopy.
    • To demonstrate the feasibility of using holographic optical tweezers for this purpose.

    Main Methods:

    • Holographic optical tweezers were proposed and implemented to trap and immobilize live cells in suspension.
    • Spatially resolved Raman spectroscopy was performed on the immobilized cell.

    Main Results:

    • Successfully demonstrated the use of holographic optical tweezers for immobilizing a live cell in suspension.
    • Acquired spatially resolved Raman spectra from the live cell, providing biochemical information.

    Conclusions:

    • Holographic optical tweezers offer a viable solution for Raman spectroscopic analysis of live cells in suspension.
    • This technique opens new avenues for studying cellular biochemistry in a non-invasive, spatially resolved manner.

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