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Title: Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces

In situ surface-sensitive x-ray diffraction and grazing incidence x-ray fluorescence spectroscopy (GIXFS) methods are combined to determine the ionic distributions across the liquid/vapor interfaces of thiolated-polyethylene-glycol–capped gold nanoparticle (PEG-AuNP) solutions. Induced by the addition of salts (i.e., Cs 2SO 4) to PEG-AuNPs solutions, two-dimensional hexagonal lattices of PEG-AuNPs form spontaneously at the aqueous surfaces, as is demonstrated by x-ray reflectivity and grazing incidence small-angle x-ray scattering. In conclusion, by taking advantage of element specificity with the GIXFS method, we find that the cation Cs + concentration at the crystalline film is significantly reduced in parts of the PEG-AuNP film compared with that in the bulk.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2]
  1. Ames Lab., Ames, IA (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Report Number(s):
IS-J-9553
Journal ID: ISSN 2475-9953; PRMHAR; TRN: US1801039
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 7; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1417353
Alternate Identifier(s):
OSTI ID: 1413364

Wang, Wenjie, Zhang, Honghu, Mallapragada, Surya, Travesset, Alex, and Vaknin, David. Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces. United States: N. p., Web. doi:10.1103/PhysRevMaterials.1.076002.
Wang, Wenjie, Zhang, Honghu, Mallapragada, Surya, Travesset, Alex, & Vaknin, David. Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces. United States. doi:10.1103/PhysRevMaterials.1.076002.
Wang, Wenjie, Zhang, Honghu, Mallapragada, Surya, Travesset, Alex, and Vaknin, David. 2017. "Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces". United States. doi:10.1103/PhysRevMaterials.1.076002. https://www.osti.gov/servlets/purl/1417353.
@article{osti_1417353,
title = {Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces},
author = {Wang, Wenjie and Zhang, Honghu and Mallapragada, Surya and Travesset, Alex and Vaknin, David},
abstractNote = {In situ surface-sensitive x-ray diffraction and grazing incidence x-ray fluorescence spectroscopy (GIXFS) methods are combined to determine the ionic distributions across the liquid/vapor interfaces of thiolated-polyethylene-glycol–capped gold nanoparticle (PEG-AuNP) solutions. Induced by the addition of salts (i.e., Cs2SO4) to PEG-AuNPs solutions, two-dimensional hexagonal lattices of PEG-AuNPs form spontaneously at the aqueous surfaces, as is demonstrated by x-ray reflectivity and grazing incidence small-angle x-ray scattering. In conclusion, by taking advantage of element specificity with the GIXFS method, we find that the cation Cs+ concentration at the crystalline film is significantly reduced in parts of the PEG-AuNP film compared with that in the bulk.},
doi = {10.1103/PhysRevMaterials.1.076002},
journal = {Physical Review Materials},
number = 7,
volume = 1,
place = {United States},
year = {2017},
month = {12}
}

Works referenced in this record:

Nanoparticle Superlattice Engineering with DNA
journal, October 2011

DNA-guided crystallization of colloidal nanoparticles
journal, January 2008
  • Nykypanchuk, Dmytro; Maye, Mathew M.; van der Lelie, Daniel
  • Nature, Vol. 451, Issue 7178, p. 549-552
  • DOI: 10.1038/nature06560

DNA-programmable nanoparticle crystallization
journal, January 2008
  • Park, Sung Yong; Lytton-Jean, Abigail K. R.; Lee, Byeongdu
  • Nature, Vol. 451, Issue 7178, p. 553-556
  • DOI: 10.1038/nature06508

Self-Assembly at All Scales
journal, March 2002
  • Whitesides, George M.; Grzybowski, Bartosz
  • Science, Vol. 295, Issue 5564, p. 2418-2421
  • DOI: 10.1126/science.1070821