Size control of aggregations via self-assembly of amphiphilic gold nanoparticles

Size control of aggregations via self-assembly of amphiphilic gold nanoparticles Colloids and Surfaces A 538 (2018) 574–582 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Size control of aggregations via self-assembly of amphiphilic gold nanoparticles Hyun-Jun Jang, Hee-Young Lee Department of Chemical Engineering, The Kumoh National Institute of Technology, 61, Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: A simple and reliable method is described to create aggregated structures of gold nanoparticles (AuNPs) with a Amphiphilic gold nanoparticles tunable size in water. The surface of the AuNPs is covered with mixed monolayers of hydrophobic and hydro- Self-assembly philic ligands, and aggregations of the AuNPs with an irregularly spherical shape are induced by the self-as- Mixed monolayers sembly of AuNPs due to hydrophobic and electrostatic interactions. Here, two ligands on the AuNP surface are Surfactants not fixed but are rearranged for the formation of the AuNP aggregations. The sizes of the aggregations can be easily tuned by varying the molar ratio of the hydrophobic and hydrophilic ligands used. Changes in the sizes of the structures are systematically characterized by transmission electron microscope (TEM) and dynamic light scattering (DLS). A red-shift of the wavelength from UV–vis spectroscopy data and http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Colloids and Surfaces A: Physicochemical and Engineering Aspects Elsevier

Size control of aggregations via self-assembly of amphiphilic gold nanoparticles

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0927-7757
eISSN
1873-4359
D.O.I.
10.1016/j.colsurfa.2017.11.057
Publisher site
See Article on Publisher Site

Abstract

Colloids and Surfaces A 538 (2018) 574–582 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Size control of aggregations via self-assembly of amphiphilic gold nanoparticles Hyun-Jun Jang, Hee-Young Lee Department of Chemical Engineering, The Kumoh National Institute of Technology, 61, Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: A simple and reliable method is described to create aggregated structures of gold nanoparticles (AuNPs) with a Amphiphilic gold nanoparticles tunable size in water. The surface of the AuNPs is covered with mixed monolayers of hydrophobic and hydro- Self-assembly philic ligands, and aggregations of the AuNPs with an irregularly spherical shape are induced by the self-as- Mixed monolayers sembly of AuNPs due to hydrophobic and electrostatic interactions. Here, two ligands on the AuNP surface are Surfactants not fixed but are rearranged for the formation of the AuNP aggregations. The sizes of the aggregations can be easily tuned by varying the molar ratio of the hydrophobic and hydrophilic ligands used. Changes in the sizes of the structures are systematically characterized by transmission electron microscope (TEM) and dynamic light scattering (DLS). A red-shift of the wavelength from UV–vis spectroscopy data and

Journal

Colloids and Surfaces A: Physicochemical and Engineering AspectsElsevier

Published: Feb 5, 2018

References

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