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Researchers developed molecular quantum nanosensors (MoQNs) for precise intracellular temperature mapping. These novel quantum sensors overcome limitations of existing tools, enabling accurate thermal sensing within cancer cells.

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Area of Science:

  • Quantum sensing
  • Nanotechnology
  • Cellular biophysics

Background:

  • Accurate intracellular temperature mapping is crucial for understanding cellular functions.
  • Current quantum sensing technologies (nanodiamonds, quantum dots, fluorescent proteins) have limitations including heterogeneity, cytotoxicity, and specificity.
  • A need exists for advanced, reliable intracellular quantum sensors.

Purpose of the Study:

  • To introduce molecular quantum nanosensors (MoQNs) as a next-generation platform for intracellular quantum sensing.
  • To demonstrate the capability of MoQNs for high-resolution, absolute temperature sensing within living cells.
  • To provide a chemically tunable and biologically compatible solution for intracellular thermal and biochemical state detection.

Main Methods:

  • Embedding pentacene molecular spin qubits within para-terphenyl nanocrystals.
  • Coating nanocrystals with Pluronic F-127 to create MoQNs.
  • Chemically suppressing hyperfine interactions to enhance spectral resolution.
  • Utilizing MoQNs for spatially resolved temperature sensing in cancer cell cytoplasm and nuclei.

Main Results:

  • MoQNs exhibit molecular-level uniformity and long spin coherence times under physiological conditions.
  • Demonstrated spatially resolved absolute temperature sensing within the cytoplasm and nuclei of cancer cells.
  • Achieved enhanced spectral resolution through chemical suppression of hyperfine interactions.

Conclusions:

  • MoQNs represent a significant advancement in intracellular quantum sensing.
  • The platform offers a chemically tunable and biologically compatible approach for quantum-level intracellular detection.
  • MoQNs enable precise monitoring of thermal and biochemical states within living cells.