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Studying the Effects of Temperature on the Nucleation and Growth of Nanoparticles by Liquid-Cell Transmission Electron Microscopy

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Quantitative Temperature Measurements in Gold Nanorods Using Digital Holography.

Adrien Lalisse^1,2, Abeer Al Mohtar^1,3, Minh Chau Nguyen⁴

¹Laboratoire de Neurophotonique CNRS UMR8250, Université Paris Descartes, 75270 Paris, France.

ACS Applied Materials & Interfaces

|February 18, 2021

Summary

This summary is machine-generated.

We developed a new method for precise nanoscale temperature measurement using modulated photothermal stimulation and digital holography. This technique accurately quantifies temperature on individual nanoparticles without calibration.

Keywords:

digital holography gold nanostructures optical modeling photothermal holography thermal modeling thermoplasmonics

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Area of Science:

Physics
Materials Science
Nanotechnology

Background:

Accurate temperature characterization at the nanoscale is crucial for photothermal applications.
Existing methods for measuring nanoparticle temperature often lack precision or require calibration.

Purpose of the Study:

To introduce a novel, calibration-free approach for quantitative temperature measurements on individual nanoparticles.
To investigate the relationship between nanoparticle aspect ratio and temperature under photothermal stimulation.

Main Methods:

Combining modulated photothermal stimulation with heterodyne digital holography.
Utilizing full-field reconstructed holograms for temperature determination.
Analyzing the aspect ratio's effect on gold nanoparticle temperature.

Main Results:

Achieved temperature determination with a precision of 0.3 K.
Demonstrated a simple, calibration-free measurement approach.
Observed good agreement between experimental results and numerical simulations for gold nanoparticles.

Conclusions:

The proposed method offers a precise and straightforward way to measure nanoscale temperatures.
This technique is valuable for understanding photothermal effects in nanoparticles.
The study provides insights into nanoparticle temperature behavior based on their geometry.