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This study introduces a dual-mode quantum sensor for simultaneous nanoscale temperature and viscoelasticity measurements within cells. This breakthrough enables deeper understanding of cellular processes and disease progression.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Quantum Sensing

Background:

  • Cytoplasmic viscoelasticity is crucial for cellular functions like division and transport.
  • Cellular temperature influences bioenergetics, and its interplay with viscoelasticity is key to understanding metabolism and disease.
  • Existing biosensing tools struggle with simultaneous nanoscale measurements of these dynamic, interdependent properties.

Purpose of the Study:

  • To develop a novel dual-mode quantum sensor for simultaneous nanoscale thermometry and rheometry.
  • To investigate the temperature-dependent viscoelasticity in complex cellular environments.
  • To explore the relationship between intracellular forces, cytoplasmic rheology, and active cellular processes.

Main Methods:

  • Utilized nitrogen-vacancy centers in diamond nanocrystals as biocompatible quantum sensors.
  • Combined sub-diffraction resolution single-particle tracking with optically detected magnetic resonance spectroscopy.
  • Performed simultaneous sensing of viscoelasticity and temperature in dynamic cellular environments and complex media.

Main Results:

  • Demonstrated probing of temperature-dependent viscoelasticity at the nanoscale in complex media.
  • Investigated the interplay between intracellular forces and cytoplasmic rheology in live cells.
  • Identified distinct rheological regimes and provided evidence of active trafficking and nanoscale cytoplasmic viscoelasticity.

Conclusions:

  • The dual-mode quantum sensor offers a powerful new tool for studying complex cellular biophysics.
  • Understanding nanoscale viscoelasticity and temperature dynamics is vital for deciphering cellular functions and disease mechanisms.
  • This technology opens avenues for advanced research in cellular metabolism, intracellular transport, and disease progression.