Lamellar and Hexagonal Assemblies of PEG-Grafted Silver Nanoparticles: Implications for Plasmonics and Photonics
Journal Article
·
· ACS Applied Nano Materials
- Ames Lab., Ames, IA (United States)
- Univ. of Chicago, IL (United States)
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Assembly of silver nanoparticles (AgNPs) grafted with thiolated poly(ethylene glycol) (PEG-SH) with various molecular weights is reported. Synchrotron-based X-ray surface-sensitive diffraction methods are used to determine the nature of two-dimensional (2D) assemblies at liquid/vapor interfaces, and small-angle X-ray scattering (SAXS) is used to monitor the three-dimensional (3D) assemblies in bulk suspensions. We find that assembly can be induced either by the addition of K2CO3 or polyacrylic acid (PAA) to the PEG-AgNP aqueous suspensions. The addition of K2CO3 induces a 2D hexagonal structure at the liquid/vapor interface and a 3D hexagonal columnar structure in solutions, where the columns consist of tethered PEG-AgNP chains. On the other hand, the addition of PAA leads to the formation of a 2D lamella-like distorted hexagonal sheet at the liquid/vapor interface and a 3D lamellar superstructure formed by stacked 2D sheets in the PEG-AgNP suspension. Effects of the core type of nanoparticles on the assembly can be used to control structures for potential applications in plasmonics and photonics.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-06CH11357; AC02-07CH11358
- OSTI ID:
- 1923467
- Report Number(s):
- IS-J 10,951
- Journal Information:
- ACS Applied Nano Materials, Journal Name: ACS Applied Nano Materials Journal Issue: 12 Vol. 5; ISSN 2574-0970
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles [Effect of (Poly)electrolytes on the Interfacial Assembly of PEG Functionalized Gold Nanoparticles]
Macroscopic and tunable nanoparticle superlattices
Polyethylene-Glycol-Mediated Self-Assembly of Magnetite Nanoparticles at the Liquid/Vapor Interface
Journal Article
·
Wed Jan 09 19:00:00 EST 2019
· Langmuir
·
OSTI ID:1494940
Macroscopic and tunable nanoparticle superlattices
Journal Article
·
Sun Oct 23 20:00:00 EDT 2016
· Nanoscale
·
OSTI ID:1362278
Polyethylene-Glycol-Mediated Self-Assembly of Magnetite Nanoparticles at the Liquid/Vapor Interface
Journal Article
·
Thu Mar 22 20:00:00 EDT 2018
· Advanced Materials Interfaces
·
OSTI ID:1433669