3D Atomic-Scale Dynamics of Laser-Light-Induced Restructuring of Nanoparticles Unraveled by Electron Tomography
Albrecht, Wiebke; Arslan Irmak, Ece; Altantzis, Thomas; Pedrazo-Tardajos, Adrián; Skorikov, Alexander; Deng, Tian Song; van der Hoeven, Jessi E.S.; van Blaaderen, Alfons; Van Aert, Sandra; Bals, Sara
(2021) Advanced Materials, volume 33, issue 33, pp. 1 - 10
(Article)
Abstract
Understanding light–matter interactions in nanomaterials is crucial for optoelectronic, photonic, and plasmonic applications. Specifically, metal nanoparticles (NPs) strongly interact with light and can undergo shape transformations, fragmentation and ablation upon (pulsed) laser excitation. Despite being vital for technological applications, experimental insight into the underlying atomistic processes is still lacking due
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to the complexity of such measurements. Herein, atomic resolution electron tomography is performed on the same mesoporous-silica-coated gold nanorod, before and after femtosecond laser irradiation, to assess the missing information. Combined with molecular dynamics (MD) simulations based on the experimentally determined 3D atomic-scale morphology, the complex atomistic rearrangements, causing shape deformations and defect generation, are unraveled. These rearrangements are simultaneously driven by surface diffusion, facet restructuring, and strain formation, and are influenced by subtleties in the atomic distribution at the surface.
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Keywords: 3D atomic structure, femtosecond laser excitation, gold nanorods, molecular dynamics, reshaping, Materials Science(all), Mechanics of Materials, Mechanical Engineering
ISSN: 0935-9648
Publisher: Wiley-VCH Verlag
Note: Funding Information: W.A. and E.A.I. contributed equally to this work. The authors acknowledge funding from the European Research Council under the European Union's Horizon 2020 research and innovation program (ERC Consolidator Grants No. 815128 ‐ REALNANO and No. 770887 ‐ PICOMETRICS), the European Union's Seventh Framework Programme (ERC Advanced Grant No. 291667 ‐ HierarSACol), and the European Commission (EUSMI). W.A. acknowledges an Individual Fellowship funded by the Marie Sklodowska‐Curie Actions (MSCA) in the Horizon 2020 program (Grant 797153, SOPMEN). T.‐S.D. acknowledges financial support from the National Science Foundation of China (NSFC, Grant No. 61905056). The authors also acknowledge financial support by the Research Foundation Flanders (FWO Grant G.0267.18N). Publisher Copyright: © 2021 Wiley-VCH GmbH
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