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

Abstract

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.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
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
OSTI Identifier:
1619667
Alternate Identifier(s):
OSTI ID: 1581593
Report Number(s):
IS-J 10039
Journal ID: ISSN 2045-2322; 20349; PII: 56730
Grant/Contract Number:  
AC02-07CH11358; NSF/CHE-1834750; AC02-06CH11357
Resource Type:
Journal Article: Published Article
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Name: Scientific Reports Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Kim, Hyeong Jin, Wang, Wenjie, Bu, Wei, Hossen, Md Mir, Londoño-Calderon, Alejandra, Hillier, Andrew C., Prozorov, Tanya, Mallapragada, Surya, and Vaknin, David. Salt Mediated Self-Assembly of Poly(ethylene glycol)-Functionalized Gold Nanorods. United Kingdom: N. p., 2019. Web. doi:10.1038/s41598-019-56730-2.
Kim, Hyeong Jin, Wang, Wenjie, Bu, Wei, Hossen, Md Mir, Londoño-Calderon, Alejandra, Hillier, Andrew C., Prozorov, Tanya, Mallapragada, Surya, & Vaknin, David. Salt Mediated Self-Assembly of Poly(ethylene glycol)-Functionalized Gold Nanorods. United Kingdom. https://doi.org/10.1038/s41598-019-56730-2
Kim, Hyeong Jin, Wang, Wenjie, Bu, Wei, Hossen, Md Mir, Londoño-Calderon, Alejandra, Hillier, Andrew C., Prozorov, Tanya, Mallapragada, Surya, and Vaknin, David. 2019. "Salt Mediated Self-Assembly of Poly(ethylene glycol)-Functionalized Gold Nanorods". United Kingdom. https://doi.org/10.1038/s41598-019-56730-2.
@article{osti_1619667,
title = {Salt Mediated Self-Assembly of Poly(ethylene glycol)-Functionalized Gold Nanorods},
author = {Kim, Hyeong Jin and Wang, Wenjie and Bu, Wei and Hossen, Md Mir and Londoño-Calderon, Alejandra and Hillier, Andrew C. and Prozorov, Tanya and Mallapragada, Surya and Vaknin, David},
abstractNote = {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.},
doi = {10.1038/s41598-019-56730-2},
url = {https://www.osti.gov/biblio/1619667}, journal = {Scientific Reports},
issn = {2045-2322},
number = 1,
volume = 9,
place = {United Kingdom},
year = {Mon Dec 30 00:00:00 EST 2019},
month = {Mon Dec 30 00:00:00 EST 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at https://doi.org/10.1038/s41598-019-56730-2

Citation Metrics:
Cited by: 17 works
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