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

Journal Article · · Scientific Reports

Abstract 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.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-07CH11358; NSF/CHE-1834750; AC02-06CH11357
OSTI ID:
1619667
Alternate ID(s):
OSTI ID: 1581593
Report Number(s):
IS-J 10039; 20349; PII: 56730
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 9 Journal Issue: 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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  • Rodríguez-Fernández, Jessica; Pérez−Juste, Jorge; Liz−Marzán, Luis M.
  • The Journal of Physical Chemistry C, Vol. 111, Issue 13 https://doi.org/10.1021/jp067049x
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