Making Mobile Nanotechnology Accessible: Is the Explicit Preparation of Janus Nanoparticle Necessary to Achieve Mobility?

Nidhi, Vagisha; Allaire, Arthur; Ait Athmane, Zakariya; Guenoun, Patrick; Testard, Fabienne; Renault, Jean-Philippe; Malloggi, Florent

doi:10.3390/nano14221796

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Making Mobile Nanotechnology Accessible: Is the Explicit Preparation of Janus Nanoparticle Necessary to Achieve Mobility?

by

Vagisha Nidhi

,

Arthur Allaire

,

Zakariya Ait Athmane

,

Patrick Guenoun

,

Fabienne Testard

^*,

Jean-Philippe Renault

^* and

Florent Malloggi

^*

Université Paris-Saclay, CEA Saclay, CNRS, NIMBE, UMR 3685, LIONS, 91191 Gif-Sur-Yvette CEDEX, France

^*

Authors to whom correspondence should be addressed.

Nanomaterials 2024, 14(22), 1796; https://doi.org/10.3390/nano14221796

Submission received: 9 September 2024 / Revised: 24 October 2024 / Accepted: 5 November 2024 / Published: 8 November 2024

(This article belongs to the Special Issue Morphological Design and Synthesis of Nanoparticles (Second Edition))

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Abstract

This study compares the mobility behaviour, in a H₂O₂ environment, of three different geometries of hybrid particle made of silica core functionalized by gold (nanoparticles or layer). It is known that the decomposition of H₂O₂ on gold surfaces drives mobility; however, the link between mobility orientation and the organization of gold on silica surfaces is still questionable. While conventional wisdom posits that asymmetric designs are crucial for generating phoretic forces or localized bubble propulsion, recent research suggests that symmetrical particles may also exhibit motility. To address this debate, we developed a robust workflow for synthesizing gold grafted silica nanoparticles with precise control over size and shape, enabling the direct comparison of their motile behaviour by dynamic light scattering and particle tracking velocimetry. Our results indicate, first, that a combination of techniques is necessary to overcome their intrinsic limitation and, second, that the inherent asymmetry generated by isotropic gold nanoparticle deposition onto silica surfaces may enable particle motility.

Keywords: self-propulsion; mobility; chemotaxism; Janus particles; gold–silica particles; DLS; PTV

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MDPI and ACS Style

Nidhi, V.; Allaire, A.; Ait Athmane, Z.; Guenoun, P.; Testard, F.; Renault, J.-P.; Malloggi, F. Making Mobile Nanotechnology Accessible: Is the Explicit Preparation of Janus Nanoparticle Necessary to Achieve Mobility? Nanomaterials 2024, 14, 1796. https://doi.org/10.3390/nano14221796

AMA Style

Nidhi V, Allaire A, Ait Athmane Z, Guenoun P, Testard F, Renault J-P, Malloggi F. Making Mobile Nanotechnology Accessible: Is the Explicit Preparation of Janus Nanoparticle Necessary to Achieve Mobility? Nanomaterials. 2024; 14(22):1796. https://doi.org/10.3390/nano14221796

Chicago/Turabian Style

Nidhi, Vagisha, Arthur Allaire, Zakariya Ait Athmane, Patrick Guenoun, Fabienne Testard, Jean-Philippe Renault, and Florent Malloggi. 2024. "Making Mobile Nanotechnology Accessible: Is the Explicit Preparation of Janus Nanoparticle Necessary to Achieve Mobility?" Nanomaterials 14, no. 22: 1796. https://doi.org/10.3390/nano14221796

APA Style

Nidhi, V., Allaire, A., Ait Athmane, Z., Guenoun, P., Testard, F., Renault, J.-P., & Malloggi, F. (2024). Making Mobile Nanotechnology Accessible: Is the Explicit Preparation of Janus Nanoparticle Necessary to Achieve Mobility? Nanomaterials, 14(22), 1796. https://doi.org/10.3390/nano14221796

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Making Mobile Nanotechnology Accessible: Is the Explicit Preparation of Janus Nanoparticle Necessary to Achieve Mobility?

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