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:
- 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. Mon .
"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},
journal = {Scientific Reports},
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}
}
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https://doi.org/10.1038/s41598-019-56730-2
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