Programming crack patterns with light in colloidal plasmonic films

Fanny Thorimbert, Mateusz Odziomek, Denis Chateau, Stéphane Parola and Marco Faustini ()
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Fanny Thorimbert: Sorbonne Université, CNRS, UMR 7574, Chimie de la Matière Condensée de Paris
Mateusz Odziomek: Max Planck Institute of Colloids and Interfaces
Denis Chateau: Université Claude Bernard Lyon 1, Laboratoire de Chimie
Stéphane Parola: Université Claude Bernard Lyon 1, Laboratoire de Chimie
Marco Faustini: Sorbonne Université, CNRS, UMR 7574, Chimie de la Matière Condensée de Paris

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Crack formation observed across diverse fields like geology, nanotechnology, arts, structural engineering or surface science, is a chaotic and undesirable phenomenon, resulting in random patterns of cracks generally leading to material failure. Limiting the formation of cracks or “programming” the path of cracks is a great technological challenge since it holds promise to enhance material durability or even to develop low cost patterning methods. Drawing inspiration from negative phototropism in plants, we demonstrate the capability to organize, guide, replicate, or arrest crack propagation in colloidal films through remote light manipulation. The key consists in using plasmonic photothermal absorbers to generate “virtual” defects enabling controlled deviation of cracks. We engineer a dip-coating process coupled with selective light irradiation enabling simultaneous deposition and light-directed crack patterning. This approach represents a rare example of a robust self-assembly process with long-range order that can be programmed in both space and time.

Date: 2024
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DOI: 10.1038/s41467-024-45365-1

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