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Rapid Cationization of Gold Nanoparticles by Two‐Step Phase Transfer
Author(s) -
Hassinen Jukka,
Liljeström Ville,
Kostiainen Mauri A.,
Ras Robin H. A.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201503655
Subject(s) - cationic polymerization , colloidal gold , nanoparticle , nanotechnology , plasmon , phase (matter) , materials science , chemistry , combinatorial chemistry , chemical engineering , polymer chemistry , organic chemistry , optoelectronics , engineering
Cationic gold nanoparticles offer intriguing opportunities as drug carriers and building blocks for self‐assembled systems. Despite major progress on gold nanoparticle research in general, the synthesis of cationic gold particles larger than 5 nm remains a major challenge, although these species would give a significantly larger plasmonic response compared to smaller cationic gold nanoparticles. Herein we present the first reported synthesis of cationic gold nanoparticles with tunable sizes between 8–20 nm, prepared by a rapid two‐step phase‐transfer protocol starting from simple citrate‐capped particles. These cationic particles form ordered self‐assembled structures with negatively charged biological components through electrostatic interactions.