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Imaging rotational dynamics of nanoparticles in liquid by 4D electron microscopy

Fu, Xuewen and Chen, Bin and Tang, Jau and Hassan, Mohammed Th. and Zewail, Ahmed H. (2017) Imaging rotational dynamics of nanoparticles in liquid by 4D electron microscopy. Science, 355 (6324). pp. 494-498. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20170206-084626446

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[img] Video (MPEG) (Rotation of a gold NP-dimer induced by a chain of fs-laser pulses excitation (fluence 4.5 mJ/cm2, repetition rate 1 kHz).) - Supplemental Material
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[img] Video (MPEG) (Rotation of a gold NP-cluster induced by a single fs-laser pulse excitation (fluence 20 mJ/cm2)) - Supplemental Material
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[img] Video (MPEG) ( Rotation of D1 dimer induced by 1 kHz fs-laser pulses excitation with a fluence of 2.4 mJ/cm2) - Supplemental Material
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[img] Video (MPEG) (Rotation of D3 dimer induced by 1 kHz fs-laser pulses excitation with a fluence of 2.4 mJ/cm2) - Supplemental Material
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Abstract

In real time and space, four-dimensional electron microscopy (4D EM) has enabled observation of transient structures and morphologies of inorganic and organic materials. We have extended 4D EM to include liquid cells without the time resolution being limited by the response of the detector. Our approach permits the imaging of the motion and morphological dynamics of a single, same particle on nanometer and ultrashort time scales. As a first application, we studied the rotational dynamics of gold nanoparticles in aqueous solution. A full transition from the conventional diffusive rotation to superdiffusive rotation and further to a ballistic rotation was observed with increasing asymmetry of the nanoparticle morphology. We explored the underlying physics both experimentally and theoretically according to the morphological asymmetry of the nanoparticles.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.aah3582DOIArticle
http://science.sciencemag.org/content/355/6324/494.fullPublisherArticle
http://science.sciencemag.org/content/suppl/2017/02/01/355.6324.494.DC1Related ItemSupplementary Materials
ORCID:
AuthorORCID
Fu, Xuewen0000-0001-6116-4680
Tang, Jau0000-0003-2078-1513
Additional Information:© 2017 American Association for the Advancement of Science. 14 June 2016; resubmitted 19 September 2016. Accepted 15 December 2016. This work was supported by the Air Force Office of Scientific Research, grant FA9550-11-1-0055S, for research conducted at The Gordon and Betty Moore Center for Physical Biology at the California Institute of Technology. We thank J. S. Baskin for very helpful discussion and for his help setting up the new femtosecond laser system. We appreciate J. K. Barton, R. A. Marcus, and J. F. Brady for helpful discussion and suggestions. We also thank J. Hu and H. Li for fruitful discussion.
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-11-1-0055S
Gordon and Betty Moore FoundationUNSPECIFIED
Issue or Number:6324
Record Number:CaltechAUTHORS:20170206-084626446
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170206-084626446
Official Citation:Imaging rotational dynamics of nanoparticles in liquid by 4D electron microscopy BY XUEWEN FU, BIN CHEN, JAU TANG, MOHAMMED TH. HASSAN, AHMED H. ZEWAIL Science 03 Feb 2017: Vol. 355, Issue 6324, pp. 494-498 DOI: 10.1126/science.aah3582
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74064
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Feb 2017 17:45
Last Modified:09 Mar 2020 13:19

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