Interfacial and Bulk Assembly of Anisotropic Gold Nanostructures: Implications for Photonics and Plasmonics

dc.contributor.author Kim, Hyeong Jin
dc.contributor.author Hossen, Md Mir
dc.contributor.author Hillier, Andrew
dc.contributor.author Vaknin, David
dc.contributor.author Mallapragada, Surya
dc.contributor.author Wang, Wenjie
dc.contributor.department Ames National Laboratory
dc.contributor.department Physics and Astronomy
dc.contributor.department Neuroscience
dc.contributor.department Materials Science and Engineering
dc.contributor.department Chemical and Biological Engineering
dc.date 2020-10-29T02:42:17.000
dc.date.accessioned 2021-02-24T20:26:07Z
dc.date.available 2021-02-24T20:26:07Z
dc.date.embargo 2021-07-16
dc.date.issued 2020-07-16
dc.description.abstract <p>We report on the assembly of polymer-grafted nanostructures at the vapor/aqueous interface and in bulk solutions using synchrotron X-ray diffraction methods. Triangular- and octahedral-shaped gold nanostructures are synthesized and grafted with poly(ethylene glycol) (referred to as PEG-AuNTs and PEG-AuNOh, respectively), and their suspensions are manipulated with salts, (poly)electrolytes that induce interpolymer complexation and HCl to achieve organized assemblies. The assemblies at the vapor/liquid interface are explored by X-ray reflectivity and grazing-incidence small-angle X-ray scattering. Results show that PEG-AuNTs and PEG-AuNOh populate the interface, with some degree of orientation with respect to the liquid surface. The resulting assemblies can be tuned by the regulating electrolyte and pH levels of the suspensions. Similar suspension manipulations also induce three-dimensional assemblies that are revealed with solution small-angle X-ray scattering. In addition to controlling the three-dimensional (3D) aggregates by regulating the (poly)electrolytes and pH levels, we show that raising the temperature of the suspensions from 20 to above 50 degrees C induces and even improves the ordering of the assemblies. Our findings provide tools that can be used to assemble and orient anisotropic nanostructures for potential applications in photonics and plasmonics.</p>
dc.identifier archive/lib.dr.iastate.edu/ameslab_manuscripts/690/
dc.identifier.articleid 1695
dc.identifier.contextkey 20009976
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/690
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/93133
dc.language.iso en
dc.relation.ispartofseries IS-J 10318
dc.source.uri https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1440&context=cbe_pubs
dc.subject.disciplines Nanoscience and Nanotechnology
dc.subject.disciplines Polymer and Organic Materials
dc.subject.keywords Assembling nanostructures
dc.subject.keywords salt-induced self-assembly
dc.subject.keywords interpolymer-complexation
dc.subject.keywords PEG-grafted gold nanostructures
dc.subject.keywords X-ray reflectivity (XRR)
dc.subject.keywords grazing incidence small-angle X-ray scattering (GISAXS)
dc.subject.keywords small-angle X-ray scattering (SAXS)
dc.title Interfacial and Bulk Assembly of Anisotropic Gold Nanostructures: Implications for Photonics and Plasmonics
dc.type article
dc.type.genre article
dspace.entity.type Publication
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