Skip navigation
Skip navigation

Dynamics and control of gold-encapped gallium arsenide nanowires imaged by 4D electron microscopy

Chen, Bin; Fu, Xuewen; Tang, Jau; Lysevych, Mykhaylo; Tan, Hark Hoe; Jagadish, Chennupati; Zewail, Ahmed H

Description

Eutectic-related reaction is a special chemical/physical reaction involving multiple phases, solid and liquid. Visualization of a phase reaction of composite nanomaterials with high spatial and temporal resolution provides a key understanding of alloy growth with important industrial applications. However, it has been a rather challenging task. Here, we report the direct imaging and control of the phase reaction dynamics of a single, as-grown freestanding gallium arsenide nanowire encapped with...[Show more]

dc.contributor.authorChen, Bin
dc.contributor.authorFu, Xuewen
dc.contributor.authorTang, Jau
dc.contributor.authorLysevych, Mykhaylo
dc.contributor.authorTan, Hark Hoe
dc.contributor.authorJagadish, Chennupati
dc.contributor.authorZewail, Ahmed H
dc.date.accessioned2021-06-09T22:51:57Z
dc.date.available2021-06-09T22:51:57Z
dc.identifier.issn0027-8424
dc.identifier.urihttp://hdl.handle.net/1885/236980
dc.description.abstractEutectic-related reaction is a special chemical/physical reaction involving multiple phases, solid and liquid. Visualization of a phase reaction of composite nanomaterials with high spatial and temporal resolution provides a key understanding of alloy growth with important industrial applications. However, it has been a rather challenging task. Here, we report the direct imaging and control of the phase reaction dynamics of a single, as-grown freestanding gallium arsenide nanowire encapped with a gold nanoparticle, free from environmental confinement or disturbance, using four-dimensional (4D) electron microscopy. The nondestructive preparation of as-grown free-standing nanowires without supporting films allows us to study their anisotropic properties in their native environment with better statistical character. A laser heating pulse initiates the eutectic-related reaction at a temperature much lower than the melting points of the composite materials, followed by a precisely time-delayed electron pulse to visualize the irreversible transient states of nucleation, growth, and solidification of the complex. Combined with theoretical modeling, useful thermodynamic parameters of the newly formed alloy phases and their crystal structures could be determined. This technique of dynamical control aided by 4D imaging of phase reaction processes on the nanometer-ultrafast time scale opens new venues for engineering various reactions in a wide variety of other systems.
dc.description.sponsorshipThis work was supported by Air Force Office of Scientific Research Grant FA9550-11-1-0055S in the Gordon and Betty Moore Foundation for Physical Biology Center for Ultrafast Science and Technology at California Institute of Technology. M.L., H.H.T., and C.J. thank the Australian Research Council for support and the Australian National Fabrication Facility for access to the epitaxial facilities used in this work.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherNational Academy of Sciences (USA)
dc.rights© 2017 The Authors
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourcePNAS - Proceedings of the National Academy of Sciences of the United States of America
dc.source.urihttps://www.pnas.org/content/114/49/12876
dc.subjectphase reaction
dc.subjectAu/GaAs nanowires
dc.subjectstructural dynamics
dc.subjecteutectic dynamics
dc.subject4D electron microscopy
dc.titleDynamics and control of gold-encapped gallium arsenide nanowires imaged by 4D electron microscopy
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume114
dc.date.issued2017
local.identifier.absfor080104 - Computer Vision
local.identifier.ariespublicationa383154xPUB8980
local.publisher.urlhttps://www.pnas.org
local.type.statusPublished Version
local.contributor.affiliationChen, Bin, California Institute of Technology
local.contributor.affiliationFu, Xuewen, California Institute of Technology
local.contributor.affiliationTang, Jau, California Institute of Technology
local.contributor.affiliationLysevych, Mykhaylo, College of Science, ANU
local.contributor.affiliationTan, Hoe, College of Science, ANU
local.contributor.affiliationJagadish, Chennupati, College of Science, ANU
local.contributor.affiliationZewail, Ahmed H, California Institute of Technology
local.bibliographicCitation.issue49
local.bibliographicCitation.startpage12876
local.bibliographicCitation.lastpage12881
local.identifier.doi10.1073/pnas.1708761114
dc.date.updated2020-11-23T10:27:15Z
local.identifier.scopusID2-s2.0-85037032092
dcterms.accessRightsOpen Access
dc.provenanceThis open access article is distributed under Creative Commons Attribution-NonCommercialNoDerivatives License 4.0 (CC BY-NC-ND).
dc.rights.licenseCreative Commons Attribution licence
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Chen_Dynamics_and_control_of_2017.pdf1.61 MBAdobe PDFThumbnail


This item is licensed under a Creative Commons License Creative Commons

Updated:  17 November 2022/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator