Salt Mediated Self-Assembly of Poly(ethylene glycol)-Functionalized Gold Nanorods

dc.contributor.author Kim, Hyeong Jin
dc.contributor.author Wang, Wenjie
dc.contributor.author Bu, Wei
dc.contributor.author Hossen, Md. Mir
dc.contributor.author Londono-Calderon, Alejandra
dc.contributor.author Hillier, Andrew
dc.contributor.author Prozorov, Tanya
dc.contributor.author Mallapragada, Surya
dc.contributor.author Vaknin, David
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 2020-02-18T23:19:01.000
dc.date.accessioned 2020-06-29T23:23:57Z
dc.date.available 2020-06-29T23:23:57Z
dc.date.issued 2019-12-30
dc.description.abstract <p>Although challenging, assembling and orienting non-spherical nanomaterials into two- and three-dimensional (2D and 3D) ordered arrays can facilitate versatile collective properties by virtue of their shape-dependent properties that cannot be realized with their spherical counterparts. Here, we report on the self-assembly of gold nanorods (AuNRs) into 2D films at the vapor/liquid interface facilitated by grafting them with poly(ethylene glycol) (PEG). Using surface sensitive synchrotron grazing incidence small angle X-ray scattering (GISAXS) and specular X-ray reflectivity (XRR), we show that PEG-AuNRs in aqueous suspensions migrate to the vapor/liquid interface in the presence of salt, forming a uniform monolayer with planar-to-surface orientation. Furthermore, the 2D assembled PEG functionalized AuNRs exhibit short range order into rectangular symmetry with side-by-side and tail-to-tail nearest-neighbor packing. The effect of PEG chain length and salt concentration on the 2D assembly are also reported.</p>
dc.identifier archive/lib.dr.iastate.edu/ameslab_manuscripts/552/
dc.identifier.articleid 1557
dc.identifier.contextkey 16580611
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/552
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/7485
dc.language.iso en
dc.relation.ispartofseries IS-J 10039
dc.source.uri https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1390&context=cbe_pubs
dc.subject.disciplines Chemical Engineering
dc.subject.disciplines Nanoscience and Nanotechnology
dc.subject.keywords Self assembly
dc.subject.keywords Nanorod
dc.subject.keywords GISAXS
dc.subject.keywords XRR
dc.title Salt Mediated Self-Assembly of Poly(ethylene glycol)-Functionalized Gold Nanorods
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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