Abstract
The aim of this study was to develop a one-step synthesis of gold nanotriangles (NTs) in the presence of mixed phospholipid vesicles followed by a separation process to isolate purified NTs.
Highlights
Monodisperse gold nanoparticles (NPs) are of increasing interest due to their shape and size-dependent optical properties,[1,2] which are of enormous interest for many applications in photonics,[3] catalysis,[4] electronics[5] and biomedicine.[6]. It is already well established from Turkevich et al that monodisperse spherical NPs can be synthesized by adding sodium citrate as a reducing agent to a highly diluted aqueous gold chloride solution.[7]
The nucleation process in the presence of sodium citrate was than further re ned by Frens, as a bottom up strategy to build up monodisperse spherical NPs of different sizes.[8]
The corresponding cryo-scanning electron microscope (SEM) micrographs (Fig. 1B) highlighted the presence of small unilamellar vesicles (SUV) of about 50 nm in size, which is in good agreement with the number plot obtained from the Dynamic light scattering (DLS) data, in addition to the signi cantly larger giant unilamellar vesicles (GUV)
Summary
Monodisperse gold nanoparticles (NPs) are of increasing interest due to their shape and size-dependent optical properties,[1,2] which are of enormous interest for many applications in photonics,[3] catalysis,[4] electronics[5] and biomedicine.[6]. It was shown that asymmetric shaped NPs are formed by using special reduction agents, like lemongrass,[9] or tryptophan.[10] Other strategies towards the development of Current seeding-mediated synthesis methods are very efficient in controlling the size and shape of anisotropic gold nanoparticles and, especially, those of nanorods. The shape of gold crystals can be dramatically changed upon addition of trace amounts of iodide ions, resulting in the formation of gold nanoprisms.[19] Mirkin and coworkers studied the growth of nanoparticles on CTAC-capped seeds containing iodide ions in the absence or presence of silver cations and reported that the anisotropic growth only occurs in absence of silver cations.[20] Kinetically controlled reaction paths are dependent on the addition rate of ascorbic acid. Hong et al demonstrated that nanoplates are predominantly formed in presence of iodide ions at the lowest addition rate of the mild reducing agent ascorbic acid.[21]
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