Release dynamics of nanodiamonds created by laser-driven shock-compression of polyethylene terephthalate

Ben Heuser, Armin Bergermann, Michael G Stevenson, Divyanshu Ranjan, Zhiyu He, Julian Lütgert, Samuel Schumacher, Mandy Bethkenhagen, Adrien Descamps, Eric Galtier, Arianna E Gleason, Dimitri Khaghani, Griffin D Glenn, Eric F Cunningham, Siegfried H Glenzer, Nicholas J Hartley, Jean-Alexis Hernandez, Oliver S Humphries, Kento Katagiri, Hae Ja LeeEmma E McBride, Kohei Miyanishi, Bob Nagler, Benjamin Ofori-Okai, Norimasa Ozaki, Silvia Pandolfi, Chongbing Qu, Philipp Thomas May, Ronald Redmer, Christopher Schoenwaelder, Keiichi Sueda, Toshinori Yabuuchi, Makina Yabashi, Bratislav Lukic, Alexander Rack, Lisa M V Zinta, Tommaso Vinci, Alessandra Benuzzi-Mounaix, Alessandra Ravasio, Dominik Kraus

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Laser-driven dynamic compression experiments of plastic materials have found surprisingly fast formation of nanodiamonds (ND) via X-ray probing. This mechanism is relevant for planetary models, but could also open efficient synthesis routes for tailored NDs. We investigate the release mechanics of compressed NDs by molecular dynamics simulation of the isotropic expansion of finite size diamond from different P-T states. Analysing the structural integrity along different release paths via molecular dynamic simulations, we found substantial disintegration rates upon shock release, increasing with the on-Hugnoiot shock temperature. We also find that recrystallization can occur after the expansion and hence during the release, depending on subsequent cooling mechanisms. Our study suggests higher ND recovery rates from off-Hugoniot states, e.g., via double-shocks, due to faster cooling. Laser-driven shock compression experiments of polyethylene terephthalate (PET) samples with in situ X-ray probing at the simulated conditions found diamond signal that persists up to 11 ns after breakout. In the diffraction pattern, we observed peak shifts, which we attribute to thermal expansion of the NDs and thus a total release of pressure, which indicates the stability of the released NDs.
Original languageEnglish
Article number12239#
Number of pages11
JournalScientific Reports
Early online date28 May 2024
Publication statusEarly online date - 28 May 2024

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