2026-09-18T19:36:37Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1589422025-04-07T09:26:38Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
Nelson, Keith A.
Deschamps, Jude
Massachusetts Institute of Technology. Department of Chemistry
2025-03-27T16:59:32Z
2025-03-27T16:59:32Z
2025-02
2025-02-25T13:14:58.601Z
https://hdl.handle.net/1721.1/158942
0000-0002-8919-7561
In conventional laser-shock experiments in solid media, shock waves are typically excited from the ablation of a photoacoustic transducer layer deposited onto the sample of interest. Unavoidably, the target materials are damaged. This leads to the necessity of changing targets after each exposure, likely lowering the shot-to-shot reproducibility and data quality, while lowering the throughput of the experiment. Motivated by the need to generate large-amplitude transient strain waves at a high repetition rate, this thesis introduces a novel platform for the non-destructive generation and amplification of acoustic waves with associated strain levels in the percent range — up to the formation of shock waves. The acoustic amplification scheme is first described. Then, owing to the capabilities of the technique to repeatedly load a material with finite-amplitude strain waves, a demonstration of the use of the platform for microscale fatigue testing is made. Finally, the strain localization of surface acoustic waves is leveraged by transiently modulating a monolayer of a transition metal dichalcogenide deposited on a substrate.
Ph.D.
Massachusetts Institute of Technology
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
Copyright retained by author(s)
https://creativecommons.org/licenses/by-nc-sa/4.0/
Weak Shock Waves on a Chip: Generation and Applications
Thesis
application/pdf
Doctoral
Doctor of Philosophy
Publication
unknown
unknown
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<Abstract>In conventional laser-shock experiments in solid media, shock waves are typically excited from the ablation of a photoacoustic transducer layer deposited onto the sample of interest. Unavoidably, the target materials are damaged. This leads to the necessity of changing targets after each exposure, likely lowering the shot-to-shot reproducibility and data quality, while lowering the throughput of the experiment. Motivated by the need to generate large-amplitude transient strain waves at a high repetition rate, this thesis introduces a novel platform for the non-destructive generation and amplification of acoustic waves with associated strain levels in the percent range — up to the formation of shock waves. The acoustic amplification scheme is first described. Then, owing to the capabilities of the technique to repeatedly load a material with finite-amplitude strain waves, a demonstration of the use of the platform for microscale fatigue testing is made. Finally, the strain localization of surface acoustic waves is leveraged by transiently modulating a monolayer of a transition metal dichalcogenide deposited on a substrate.</Abstract>
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