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Updated: Feb 4, 2026

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Quantifying Surface Temperature of Thermoplasmonic Nanostructures.

Shu Hu1, Bi-Ju Liu1, Jia-Min Feng1

  • 1State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (i-ChEM), The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Department of Chemistry, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China.

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Summary

This study introduces a novel surface-enhanced Raman spectroscopy method for precise thermoplasmonic nanostructure temperature measurement. This technique enables accurate surface temperature monitoring for applications in photothermal therapy and cellular thermometry.

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Area of Science:

  • Nanotechnology
  • Spectroscopy
  • Biophysics

Background:

  • Precise surface temperature measurement of thermoplasmonic nanostructures is crucial for applications like photothermal therapy.
  • Existing methods lack the capability for direct surface temperature quantification of these nanostructures.

Purpose of the Study:

  • To develop a novel method for measuring the surface temperature of plasmonic nanostructures using surface-enhanced Raman spectroscopy.
  • To validate the method's accuracy and extend its application to single living cell thermometry.

Main Methods:

  • Utilizing the temperature-dependent shift in stretching vibration of phenyl isocyanide molecules adsorbed on nanostructures.
  • Employing surface-enhanced Raman spectroscopy (SERS) for sensitive temperature detection.
  • Validating the method by monitoring laser-induced desorption of CO from gold nanoparticle surfaces.

Main Results:

  • A sensitive temperature-dependent shift of phenyl isocyanide stretching vibration (0.232 cm⁻¹/°C) was observed, linked to molecular orientation changes.
  • The SERS-based method accurately measured gold nanoparticle surface temperatures during plasmonic excitation.
  • The technique was successfully applied to monitor extracellular temperature distribution and intracellular temperature changes in single living cells.

Conclusions:

  • Surface-enhanced Raman spectroscopy offers a powerful and novel approach for precise thermoplasmonic nanostructure surface temperature measurement.
  • This method provides high spatial resolution, enabling advanced applications in cellular thermometry and understanding thermal effects in biological systems.