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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.01597 |
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| _version_ | 1866910037786492928 |
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| author | Sarma, Abhisakh Koliyadu, Jayanath C. P. Letrun, Romain Sobolev, Egor C, Trupthi Devaiah Wrona, Agnieszka Doerner, Katerina Melo, Diogo V. M. Kloos, Marco Han, Huijong Sikorski, Marcin Kharitonov, Konstantin E, Juncheng Valerio, Joana Santra, Pralay K. Johansson, Erik M. J. Bean, Richard Kim, Chan Sato, Tokushi |
| author_facet | Sarma, Abhisakh Koliyadu, Jayanath C. P. Letrun, Romain Sobolev, Egor C, Trupthi Devaiah Wrona, Agnieszka Doerner, Katerina Melo, Diogo V. M. Kloos, Marco Han, Huijong Sikorski, Marcin Kharitonov, Konstantin E, Juncheng Valerio, Joana Santra, Pralay K. Johansson, Erik M. J. Bean, Richard Kim, Chan Sato, Tokushi |
| contents | Femtosecond laser-induced alloying presents a novel approach to modifying bimetallic systems. Visualizing ultrafast processes during laser-induced alloying is essential to uncover fundamental mechanisms associated with phase transformations, which enables precise control over material composition and structure at the atomic level. In this study, we investigated the ultrafast dynamics of laser-induced alloying of Au/Pd core-shell nanorods using a time-resolved X-ray diffraction technique at an X-ray free-electron laser facility, capturing the structural evolution from picoseconds to microsecond timescales. We found that a laser fluence threshold of ~ 48 mJ/cm2 with 800 nm excitation is sufficient for melting and subsequent alloy formation. Above this threshold, the formation of Au1.51Pd0.49 was observed, and we found that alloying is not a single-step phenomenon; instead, it is a dynamic process involving interdiffusion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_01597 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Time Resolved Study of Laser Induced Ultrafast Alloying Processes in Au/Pd Core Shell Nanorods Sarma, Abhisakh Koliyadu, Jayanath C. P. Letrun, Romain Sobolev, Egor C, Trupthi Devaiah Wrona, Agnieszka Doerner, Katerina Melo, Diogo V. M. Kloos, Marco Han, Huijong Sikorski, Marcin Kharitonov, Konstantin E, Juncheng Valerio, Joana Santra, Pralay K. Johansson, Erik M. J. Bean, Richard Kim, Chan Sato, Tokushi Materials Science Mesoscale and Nanoscale Physics Femtosecond laser-induced alloying presents a novel approach to modifying bimetallic systems. Visualizing ultrafast processes during laser-induced alloying is essential to uncover fundamental mechanisms associated with phase transformations, which enables precise control over material composition and structure at the atomic level. In this study, we investigated the ultrafast dynamics of laser-induced alloying of Au/Pd core-shell nanorods using a time-resolved X-ray diffraction technique at an X-ray free-electron laser facility, capturing the structural evolution from picoseconds to microsecond timescales. We found that a laser fluence threshold of ~ 48 mJ/cm2 with 800 nm excitation is sufficient for melting and subsequent alloy formation. Above this threshold, the formation of Au1.51Pd0.49 was observed, and we found that alloying is not a single-step phenomenon; instead, it is a dynamic process involving interdiffusion. |
| title | Time Resolved Study of Laser Induced Ultrafast Alloying Processes in Au/Pd Core Shell Nanorods |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.01597 |