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The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation
Plasmonic nanoparticles in aqueous solution have long been known to fragment under irradiation with intense ultrafast laser pulses, creating progeny particles with diameters of a few nanometers. However, the mechanism of this process is still intensely debated, despite numerous experimental and theo...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
RSC
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8439145/ https://www.ncbi.nlm.nih.gov/pubmed/34589666 http://dx.doi.org/10.1039/d1na00406a |
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author | Bongiovanni, Gabriele Olshin, Pavel K. Yan, Chengcheng Voss, Jonathan M. Drabbels, Marcel Lorenz, Ulrich J. |
author_facet | Bongiovanni, Gabriele Olshin, Pavel K. Yan, Chengcheng Voss, Jonathan M. Drabbels, Marcel Lorenz, Ulrich J. |
author_sort | Bongiovanni, Gabriele |
collection | PubMed |
description | Plasmonic nanoparticles in aqueous solution have long been known to fragment under irradiation with intense ultrafast laser pulses, creating progeny particles with diameters of a few nanometers. However, the mechanism of this process is still intensely debated, despite numerous experimental and theoretical studies. Here, we use in situ electron microscopy to directly observe the femtosecond laser-induced fragmentation of gold nanoparticles in water, revealing that the process occurs through ejection of individual progeny particles. Our observations suggest that the fragmentation mechanism involves Coulomb fission, which occurs as the femtosecond laser pulses ionize and melt the gold nanoparticle, causing it to eject a highly charged progeny droplet. Subsequent Coulomb fission events, accompanied by solution-mediated etching and growth processes, create complex fragmentation patterns that rapidly fluctuate under prolonged irradiation. Our study highlights the complexity of the interaction of plasmonic nanoparticles with ultrafast laser pulses and underlines the need for in situ observations to unravel the mechanisms of related phenomena. |
format | Online Article Text |
id | pubmed-8439145 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | RSC |
record_format | MEDLINE/PubMed |
spelling | pubmed-84391452021-09-27 The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation Bongiovanni, Gabriele Olshin, Pavel K. Yan, Chengcheng Voss, Jonathan M. Drabbels, Marcel Lorenz, Ulrich J. Nanoscale Adv Chemistry Plasmonic nanoparticles in aqueous solution have long been known to fragment under irradiation with intense ultrafast laser pulses, creating progeny particles with diameters of a few nanometers. However, the mechanism of this process is still intensely debated, despite numerous experimental and theoretical studies. Here, we use in situ electron microscopy to directly observe the femtosecond laser-induced fragmentation of gold nanoparticles in water, revealing that the process occurs through ejection of individual progeny particles. Our observations suggest that the fragmentation mechanism involves Coulomb fission, which occurs as the femtosecond laser pulses ionize and melt the gold nanoparticle, causing it to eject a highly charged progeny droplet. Subsequent Coulomb fission events, accompanied by solution-mediated etching and growth processes, create complex fragmentation patterns that rapidly fluctuate under prolonged irradiation. Our study highlights the complexity of the interaction of plasmonic nanoparticles with ultrafast laser pulses and underlines the need for in situ observations to unravel the mechanisms of related phenomena. RSC 2021-08-02 /pmc/articles/PMC8439145/ /pubmed/34589666 http://dx.doi.org/10.1039/d1na00406a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Bongiovanni, Gabriele Olshin, Pavel K. Yan, Chengcheng Voss, Jonathan M. Drabbels, Marcel Lorenz, Ulrich J. The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation |
title | The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation |
title_full | The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation |
title_fullStr | The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation |
title_full_unstemmed | The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation |
title_short | The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation |
title_sort | fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8439145/ https://www.ncbi.nlm.nih.gov/pubmed/34589666 http://dx.doi.org/10.1039/d1na00406a |
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