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Nucleic acid based fluorescent nanothermometers.

Sara Ebrahimi1, Yousef Akhlaghi, Mohsen Kompany-Zareh

  • 1Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS) , Zanjan, 45137-66731, Iran.

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Summary
This summary is machine-generated.

New nanothermometers using molecular beacons (MBs) on gold nanoparticles (AuNPs) offer precise micro- and nanoscale temperature measurements. These sensitive nanoprobes achieve high resolution for advanced nanobiotechnology applications.

Keywords:
fluorescencegold nanoparticlesmolecular beaconsnanothermometersthermal imaging

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Area of Science:

  • Nanotechnology
  • Biotechnology
  • Materials Science

Background:

  • Accurate thermometry is critical for nanobiotechnological applications.
  • Existing methods face challenges at micro- and nanoscales.

Purpose of the Study:

  • To develop novel nanothermometers for precise micro- and nanoscale temperature measurements.
  • To create a flexible platform for various temperature-sensing ranges.

Main Methods:

  • Utilized labeled molecular beacons (MBs) immobilized on gold nanoparticles (AuNPs).
  • Employed three MBs with varying thermostabilities as sensing elements.
  • Leveraged AuNPs as carriers and quenchers for MB fluorophores.

Main Results:

  • Achieved temperature resolution below 0.50 °C in the 15-60 °C range.
  • Demonstrated high sensitivity due to MB design and high MB density on AuNPs.
  • Exhibited satisfactory reproducibility and precision.

Conclusions:

  • The developed nanothermometers provide accurate and sensitive temperature readings at the nanoscale.
  • The flexible design allows for tunable temperature-sensing ranges.
  • The multiplex MB nanoprobe is suitable for fluorescence microscopy-based thermal imaging.