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Title: Assembling Bare Au Nanoparticles at Positively Charged Templates

Abstract

In-situ X-ray reflectivity (XRR) and grazing incidence X-ray small-angle scattering (GISAXS) reveal that unfunctionalized (bare) gold nanoparticles (AuNP) spontaneously adsorb to a cationic lipid template formed by a Langmuir monolayer of DPTAP (1,2-dihexadecanoyl-3-trimethylammonium-propane) at vapor/aqueous interfaces. Analysis of the XRR yields the electron density profile across the charged-interfaces along the surface normal showing the AuNPs assemble with vertical thickness comparable to the particle size. The GISAXS analysis indicates that the adsorbed mono-particle layer exhibits short-range in-plane correlations. By contrast, single-stranded DNA-functionalized AuNPs, while attracted to the positively charged surface (more efficiently with the addition of salt to the solution), display less in-plane regular packing compared to bare AuNPs.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Ames Lab., Ames, IA (United States). Div. of Materials Sciences and Engineering
  2. Ames Lab., Ames, IA (United States). Div. of Materials Sciences and Engineering; Iowa State Univ., Ames, IA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source, X-ray Science Div.
  4. Ames Lab., Ames, IA (United States). Div. of Materials Sciences and Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Chemical and Biological Engineering
  5. Ames Lab., Ames, IA (United States). Div. of Materials Sciences and Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1257413
Report Number(s):
IS-J-8993
Journal ID: ISSN 2045-2322; srep26462; TRN: US1601754
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wang, Wenjie, Zhang, Honghu, Kuzmenko, Ivan, Mallapragada, Surya, and Vaknin, David. Assembling Bare Au Nanoparticles at Positively Charged Templates. United States: N. p., 2016. Web. https://doi.org/10.1038/srep26462.
Wang, Wenjie, Zhang, Honghu, Kuzmenko, Ivan, Mallapragada, Surya, & Vaknin, David. Assembling Bare Au Nanoparticles at Positively Charged Templates. United States. https://doi.org/10.1038/srep26462
Wang, Wenjie, Zhang, Honghu, Kuzmenko, Ivan, Mallapragada, Surya, and Vaknin, David. Thu . "Assembling Bare Au Nanoparticles at Positively Charged Templates". United States. https://doi.org/10.1038/srep26462. https://www.osti.gov/servlets/purl/1257413.
@article{osti_1257413,
title = {Assembling Bare Au Nanoparticles at Positively Charged Templates},
author = {Wang, Wenjie and Zhang, Honghu and Kuzmenko, Ivan and Mallapragada, Surya and Vaknin, David},
abstractNote = {In-situ X-ray reflectivity (XRR) and grazing incidence X-ray small-angle scattering (GISAXS) reveal that unfunctionalized (bare) gold nanoparticles (AuNP) spontaneously adsorb to a cationic lipid template formed by a Langmuir monolayer of DPTAP (1,2-dihexadecanoyl-3-trimethylammonium-propane) at vapor/aqueous interfaces. Analysis of the XRR yields the electron density profile across the charged-interfaces along the surface normal showing the AuNPs assemble with vertical thickness comparable to the particle size. The GISAXS analysis indicates that the adsorbed mono-particle layer exhibits short-range in-plane correlations. By contrast, single-stranded DNA-functionalized AuNPs, while attracted to the positively charged surface (more efficiently with the addition of salt to the solution), display less in-plane regular packing compared to bare AuNPs.},
doi = {10.1038/srep26462},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {2016},
month = {5}
}

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    Works referencing / citing this record:

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