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Emergence of liquid following laser melting of gold thin films

X-ray structural science is undergoing a revolution driven by the emergence of X-ray Free-electron Laser (XFEL) facilities. The structures of crystalline solids can now be studied on the picosecond time scale relevant to phonons, atomic vibrations which travel at acoustic velocities. In the work pre...

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Autores principales: Robinson, Ian K., Griffiths, Jack P., Koch, Robert, Assefa, Tadesse A., Suzana, Ana F., Cao, Yue, Kim, Sungwon, Kim, Dongjin, Lee, Heemin, Kim, Sunam, Lee, Jae Hyuk, Park, Sang-Youn, Eom, Intae, Park, JaeHyun, Nam, Daewoong, Kim, Sangsoo, Chun, Sae Hwan, Hyun, Hyojung, Kim, Kyung-Sook, Lu, Ming, Song, Changyong, Kim, Hyunjung, Billinge, Simon J. L., Bozin, Emil S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10619456/
https://www.ncbi.nlm.nih.gov/pubmed/37903100
http://dx.doi.org/10.1107/S2052252523009363
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author Robinson, Ian K.
Griffiths, Jack P.
Koch, Robert
Assefa, Tadesse A.
Suzana, Ana F.
Cao, Yue
Kim, Sungwon
Kim, Dongjin
Lee, Heemin
Kim, Sunam
Lee, Jae Hyuk
Park, Sang-Youn
Eom, Intae
Park, JaeHyun
Nam, Daewoong
Kim, Sangsoo
Chun, Sae Hwan
Hyun, Hyojung
Kim, Kyung-Sook
Lu, Ming
Song, Changyong
Kim, Hyunjung
Billinge, Simon J. L.
Bozin, Emil S.
author_facet Robinson, Ian K.
Griffiths, Jack P.
Koch, Robert
Assefa, Tadesse A.
Suzana, Ana F.
Cao, Yue
Kim, Sungwon
Kim, Dongjin
Lee, Heemin
Kim, Sunam
Lee, Jae Hyuk
Park, Sang-Youn
Eom, Intae
Park, JaeHyun
Nam, Daewoong
Kim, Sangsoo
Chun, Sae Hwan
Hyun, Hyojung
Kim, Kyung-Sook
Lu, Ming
Song, Changyong
Kim, Hyunjung
Billinge, Simon J. L.
Bozin, Emil S.
author_sort Robinson, Ian K.
collection PubMed
description X-ray structural science is undergoing a revolution driven by the emergence of X-ray Free-electron Laser (XFEL) facilities. The structures of crystalline solids can now be studied on the picosecond time scale relevant to phonons, atomic vibrations which travel at acoustic velocities. In the work presented here, X-ray diffuse scattering is employed to characterize the time dependence of the liquid phase emerging from femtosecond laser-induced melting of polycrystalline gold thin films using an XFEL. In a previous analysis of Bragg peak profiles, we showed the supersonic disappearance of the solid phase and presented a model of pumped hot electrons carrying energy from the gold surface to scatter at internal grain boundaries. This generates melt fronts propagating relatively slowly into the crystal grains. By conversion of diffuse scattering to a partial X-ray pair distribution function, we demonstrate that it has the characteristic shape obtained by Fourier transformation of the measured F(Q). The diffuse signal fraction increases with a characteristic rise-time of 13 ps, roughly independent of the incident pump fluence and consequent final liquid fraction. This suggests the role of further melt-front nucleation processes beyond grain boundaries.
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spelling pubmed-106194562023-11-02 Emergence of liquid following laser melting of gold thin films Robinson, Ian K. Griffiths, Jack P. Koch, Robert Assefa, Tadesse A. Suzana, Ana F. Cao, Yue Kim, Sungwon Kim, Dongjin Lee, Heemin Kim, Sunam Lee, Jae Hyuk Park, Sang-Youn Eom, Intae Park, JaeHyun Nam, Daewoong Kim, Sangsoo Chun, Sae Hwan Hyun, Hyojung Kim, Kyung-Sook Lu, Ming Song, Changyong Kim, Hyunjung Billinge, Simon J. L. Bozin, Emil S. IUCrJ Topical Reviews X-ray structural science is undergoing a revolution driven by the emergence of X-ray Free-electron Laser (XFEL) facilities. The structures of crystalline solids can now be studied on the picosecond time scale relevant to phonons, atomic vibrations which travel at acoustic velocities. In the work presented here, X-ray diffuse scattering is employed to characterize the time dependence of the liquid phase emerging from femtosecond laser-induced melting of polycrystalline gold thin films using an XFEL. In a previous analysis of Bragg peak profiles, we showed the supersonic disappearance of the solid phase and presented a model of pumped hot electrons carrying energy from the gold surface to scatter at internal grain boundaries. This generates melt fronts propagating relatively slowly into the crystal grains. By conversion of diffuse scattering to a partial X-ray pair distribution function, we demonstrate that it has the characteristic shape obtained by Fourier transformation of the measured F(Q). The diffuse signal fraction increases with a characteristic rise-time of 13 ps, roughly independent of the incident pump fluence and consequent final liquid fraction. This suggests the role of further melt-front nucleation processes beyond grain boundaries. International Union of Crystallography 2023-10-31 /pmc/articles/PMC10619456/ /pubmed/37903100 http://dx.doi.org/10.1107/S2052252523009363 Text en © Ian Robinson et al. 2023 https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Topical Reviews
Robinson, Ian K.
Griffiths, Jack P.
Koch, Robert
Assefa, Tadesse A.
Suzana, Ana F.
Cao, Yue
Kim, Sungwon
Kim, Dongjin
Lee, Heemin
Kim, Sunam
Lee, Jae Hyuk
Park, Sang-Youn
Eom, Intae
Park, JaeHyun
Nam, Daewoong
Kim, Sangsoo
Chun, Sae Hwan
Hyun, Hyojung
Kim, Kyung-Sook
Lu, Ming
Song, Changyong
Kim, Hyunjung
Billinge, Simon J. L.
Bozin, Emil S.
Emergence of liquid following laser melting of gold thin films
title Emergence of liquid following laser melting of gold thin films
title_full Emergence of liquid following laser melting of gold thin films
title_fullStr Emergence of liquid following laser melting of gold thin films
title_full_unstemmed Emergence of liquid following laser melting of gold thin films
title_short Emergence of liquid following laser melting of gold thin films
title_sort emergence of liquid following laser melting of gold thin films
topic Topical Reviews
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10619456/
https://www.ncbi.nlm.nih.gov/pubmed/37903100
http://dx.doi.org/10.1107/S2052252523009363
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