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
Geoderma – Elsevier
Published: Feb 15, 2019
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