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Life at high temperature observed *in vitro* upon laser heating of gold nanoparticles

Biology

Life at high temperature observed *in vitro* upon laser heating of gold nanoparticles

C. Molinaro, M. Bénéfice, et al.

Discover how laser-assisted high-temperature microscopy (LA-HTM) is revolutionizing the study of thermophiles, those remarkable microorganisms thriving in extreme heat. Researchers Céline Molinaro, Maëlle Bénéfice, Aurore Gorlas, Violette Da Cunha, Hadrien M. L. Robert, Ryan Catchpole, Laurent Gallais, Patrick Forterre, and Guillaume Baffou showcase this innovative method that leverages gold nanoparticles to reveal the unique behaviors of *Geobacillus stearothermophilus* and *Sulfolobus shibatae* at elevated temperatures.

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Playback language: English
Abstract
Studying thermophiles, microorganisms thriving at high temperatures, provides insights into life's adaptation to extreme conditions. However, observing them *in vitro* requires specialized high-temperature microscopy (HTM). This article introduces laser-assisted HTM (LA-HTM), using gold nanoparticles as efficient, biocompatible light absorbers to achieve microscale heating. The method's effectiveness is demonstrated with *Geobacillus stearothermophilus* and *Sulfolobus shibatae*, showcasing germination, growth, and motility at high temperatures. LA-HTM offers a simple, safe alternative for observing thermophiles using accessible microscopy tools.
Publisher
Nature Communications
Published On
Sep 12, 2022
Authors
Céline Molinaro, Maëlle Bénéfice, Aurore Gorlas, Violette Da Cunha, Hadrien M. L. Robert, Ryan Catchpole, Laurent Gallais, Patrick Forterre, Guillaume Baffou
Tags
thermophiles
high-temperature microscopy
laser-assisted HTM
gold nanoparticles
microorganisms
life adaptation
microscale heating

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