Early time dynamics of laser-ablated silicon using ultrafast grazing incidence X-ray scattering

Journal Article · Mon Sep 30 00:00:00 EDT 2019 · Chemical Physics Letters

DOI:https://doi.org/10.1016/j.cplett.2019.136811· OSTI ID:1601213

Hull, C. ^[1]; Raj, S. ^[1]; Lam, R. ^[1]; Katayama, T. ^[2]; Pascal, T. ^[3]; Drisdell, W. S. ^[4]; Saykally, R. ^[1]; Schwartz, C. P. ^[4]

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1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
2. Japan Synchrotron Radiation Research Inst. (JASRI), Sayo-cho, Hyogo (Japan); RIKEN SPring-8 Center, Sayo-cho, Hyogo (Japan)
3. Univ. of California, San Diego, CA (United States)
4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Controlling the morphology of laser-derived nanomaterials is dependent on developing a better understanding of the particle nucleation dynamics in the ablation plume. Here in this paper, we utilize the femtosecond-length pulses from an x-ray free electron laser to perform time-resolved grazing incidence x-ray scattering measurements on a laser-produced silicon plasma plume. At 20 ps we observe a dramatic increase in the scattering amplitude at small scattering vectors, which we attribute to incipient formation of liquid silicon droplets. These results demonstrate the utility of XFELs as a tool for characterizing the formation dynamics of nanomaterials in laser-produced plasma plumes on ultrafast timescales.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; US Army Research Office (ARO); National Science Foundation (NSF)
• Grant/Contract Number: AC02-05CH11231; SC000499; SC0004993; AC02-76SF00515; W911NF-13-1-0483; W911NF-17-1-0163; DGE 1106400
• OSTI ID: 1601213
• Alternate ID(s): OSTI ID: 1570397
• Journal Information: Chemical Physics Letters, Vol. 736, Issue C; ISSN 0009-2614
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY