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Emulsions-directed assembly of gold nanoparticles to molecularly-linked and size-controlled spherical aggregates

Hussain, Irshad; Zhang, Haifei; Brust, Mathias; Barauskas, Justas LU and Cooper, Andrew I. (2010) In Journal of Colloid and Interface Science 350(1). p.368-372
Abstract
Aggregation of gold nanoparticles into soluble spherical assemblies using bi-functional ligands i.e., dithiols has recently been demonstrated but with limited control over the size of such assemblies. Herein, we report a new approach to further control the size of water dispersible spherical assemblies by confining gold nanoparticles in tiny oil droplets in water (oil-in-water emulsions) followed by their cross-linking with alkanedithiols. By controlling the size of the oil droplets and the concentration of nanoparticles, the size of spherical aggregates can be controlled from 20 to 400 nm. Cryo-TEM micrographs confirm the formation of covalently-linked soluble spherical nanoparticle assemblies within the oil emulsions in water. Such... (More)
Aggregation of gold nanoparticles into soluble spherical assemblies using bi-functional ligands i.e., dithiols has recently been demonstrated but with limited control over the size of such assemblies. Herein, we report a new approach to further control the size of water dispersible spherical assemblies by confining gold nanoparticles in tiny oil droplets in water (oil-in-water emulsions) followed by their cross-linking with alkanedithiols. By controlling the size of the oil droplets and the concentration of nanoparticles, the size of spherical aggregates can be controlled from 20 to 400 nm. Cryo-TEM micrographs confirm the formation of covalently-linked soluble spherical nanoparticle assemblies within the oil emulsions in water. Such size-controlled nanoparticle assemblies may have several potential applications including those in gas sensors, controlled delivery, and optical coatings. (C) 2010 Elsevier Inc. All rights reserved. (Less)
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organization
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Contribution to journal
publication status
published
subject
keywords
Gold nanoparticles, Emulsions-directed assembly, Porous nanospheres
in
Journal of Colloid and Interface Science
volume
350
issue
1
pages
368 - 372
publisher
Elsevier
external identifiers
  • wos:000281048300052
  • scopus:77955320217
ISSN
1095-7103
DOI
10.1016/j.jcis.2010.06.016
language
English
LU publication?
yes
id
175891f9-aac6-4743-989b-8308919efefa (old id 1673694)
date added to LUP
2010-09-23 08:15:23
date last changed
2018-05-29 09:29:08
@article{175891f9-aac6-4743-989b-8308919efefa,
  abstract     = {Aggregation of gold nanoparticles into soluble spherical assemblies using bi-functional ligands i.e., dithiols has recently been demonstrated but with limited control over the size of such assemblies. Herein, we report a new approach to further control the size of water dispersible spherical assemblies by confining gold nanoparticles in tiny oil droplets in water (oil-in-water emulsions) followed by their cross-linking with alkanedithiols. By controlling the size of the oil droplets and the concentration of nanoparticles, the size of spherical aggregates can be controlled from 20 to 400 nm. Cryo-TEM micrographs confirm the formation of covalently-linked soluble spherical nanoparticle assemblies within the oil emulsions in water. Such size-controlled nanoparticle assemblies may have several potential applications including those in gas sensors, controlled delivery, and optical coatings. (C) 2010 Elsevier Inc. All rights reserved.},
  author       = {Hussain, Irshad and Zhang, Haifei and Brust, Mathias and Barauskas, Justas and Cooper, Andrew I.},
  issn         = {1095-7103},
  keyword      = {Gold nanoparticles,Emulsions-directed assembly,Porous nanospheres},
  language     = {eng},
  number       = {1},
  pages        = {368--372},
  publisher    = {Elsevier},
  series       = {Journal of Colloid and Interface Science},
  title        = {Emulsions-directed assembly of gold nanoparticles to molecularly-linked and size-controlled spherical aggregates},
  url          = {http://dx.doi.org/10.1016/j.jcis.2010.06.016},
  volume       = {350},
  year         = {2010},
}