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Title: Ordered Networks of Gold Nanoparticles Crosslinked by Dithiol-Oligomers

Abstract

Here, controlled aggregation of nanoparticles into superlattices is a grand challenge in material science, where ligand based self–assembly is the dominant route. Here, the self–assembly of gold nanoparticles (AuNPs) that are crosslinked by water soluble oligo–(ethylene glycol)–dithiol (oEG–dithiol) is reported and their 3D structure by small angle X–ray scattering is determined. Surprisingly, a narrow region is found in the parameter space of dithiol linker–length and nanoparticle size for which the crosslinked networks form short–ranged FCC crystals. Using geometrical considerations and numerical simulations, the stability of the formed lattices is evaluated as a function of dithiol length and the number of connected nearest–neighbors, and a phase diagram of superlattice formation is provided. Identifying the narrow parameter space that allows crystallization facilitates focused exploration of linker chemical composition and medium conditions such as thermal annealing, pH, and added solutes that may lead to superior and more robust crystals.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1]; ORCiD logo [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1471220
Alternate Identifier(s):
OSTI ID: 1454899
Report Number(s):
IS-J-9742
Journal ID: ISSN 0934-0866
Grant/Contract Number:  
AC02-07CH11358; AC02-06CH11357; ACI-1548562; TG-MCB14007
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Particle & Particle Systems Characterization
Additional Journal Information:
Journal Volume: 35; Journal Issue: 8; Journal ID: ISSN 0934-0866
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; crosslinking method; nanoparticle crystallization; nanoparticle self-assembly; SAXs

Citation Formats

Nayak, Srikanth, Horst, Nathan, Zhang, Honghu, Wang, Wenjie, Mallapragada, Surya, Travesset, Alex, and Vaknin, David. Ordered Networks of Gold Nanoparticles Crosslinked by Dithiol-Oligomers. United States: N. p., 2018. Web. doi:10.1002/ppsc.201800097.
Nayak, Srikanth, Horst, Nathan, Zhang, Honghu, Wang, Wenjie, Mallapragada, Surya, Travesset, Alex, & Vaknin, David. Ordered Networks of Gold Nanoparticles Crosslinked by Dithiol-Oligomers. United States. doi:10.1002/ppsc.201800097.
Nayak, Srikanth, Horst, Nathan, Zhang, Honghu, Wang, Wenjie, Mallapragada, Surya, Travesset, Alex, and Vaknin, David. Tue . "Ordered Networks of Gold Nanoparticles Crosslinked by Dithiol-Oligomers". United States. doi:10.1002/ppsc.201800097.
@article{osti_1471220,
title = {Ordered Networks of Gold Nanoparticles Crosslinked by Dithiol-Oligomers},
author = {Nayak, Srikanth and Horst, Nathan and Zhang, Honghu and Wang, Wenjie and Mallapragada, Surya and Travesset, Alex and Vaknin, David},
abstractNote = {Here, controlled aggregation of nanoparticles into superlattices is a grand challenge in material science, where ligand based self–assembly is the dominant route. Here, the self–assembly of gold nanoparticles (AuNPs) that are crosslinked by water soluble oligo–(ethylene glycol)–dithiol (oEG–dithiol) is reported and their 3D structure by small angle X–ray scattering is determined. Surprisingly, a narrow region is found in the parameter space of dithiol linker–length and nanoparticle size for which the crosslinked networks form short–ranged FCC crystals. Using geometrical considerations and numerical simulations, the stability of the formed lattices is evaluated as a function of dithiol length and the number of connected nearest–neighbors, and a phase diagram of superlattice formation is provided. Identifying the narrow parameter space that allows crystallization facilitates focused exploration of linker chemical composition and medium conditions such as thermal annealing, pH, and added solutes that may lead to superior and more robust crystals.},
doi = {10.1002/ppsc.201800097},
journal = {Particle & Particle Systems Characterization},
number = 8,
volume = 35,
place = {United States},
year = {Tue Jun 19 00:00:00 EDT 2018},
month = {Tue Jun 19 00:00:00 EDT 2018}
}

Journal Article:
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This content will become publicly available on June 19, 2019
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