Surfactant-free shape control of gold nanoparticles enabled by unified theoretical framework of nanocrystal synthesis Journal Article

   

Authors:	Wall, M. A.; Harmsen, S.; Pal, S.; Zhang, L.; Arianna, G.; Lombardi, J. R.; Drain, C. M.; Kircher, M. F.
Article Title:	Surfactant-free shape control of gold nanoparticles enabled by unified theoretical framework of nanocrystal synthesis
Abstract:	Gold nanoparticles have unique properties that are highly dependent on their shape and size. Synthetic methods that enable precise control over nanoparticle morphology currently require shape-directing agents such as surfactants or polymers that force growth in a particular direction by adsorbing to specific crystal facets. These auxiliary reagents passivate the nanoparticles' surface, and thus decrease their performance in applications like catalysis and surface-enhanced Raman scattering. Here, a surfactant- and polymer-free approach to achieving high-performance gold nanoparticles is reported. A theoretical framework to elucidate the growth mechanism of nanoparticles in surfactant-free media is developed and it is applied to identify strategies for shape-controlled syntheses. Using the results of the analyses, a simple, green-chemistry synthesis of the four most commonly used morphologies: nanostars, nanospheres, nanorods, and nanoplates is designed. The nanoparticles synthesized by this method outperform analogous particles with surfactant and polymer coatings in both catalysis and surface-enhanced Raman scattering. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Keywords:	chemical analysis; nanoparticles; catalysis; synthesis (chemical); metal nanoparticles; polymers; gold; crystal growth; surface enhanced raman scattering (sers); nanorods; theoretical framework; raman scattering; surface scattering; gold nanorods; shape-control; surfactant-free; fiber optic sensors; surface active agents; gold nanorod; nanocrystal synthesis; nanoparticle morphology; shape control; shape controlled synthesis
Journal Title:	Advanced Materials
Volume:	29
Issue:	21
ISSN:	0935-9648
Publisher:	Wiley V C H Verlag Gmbh
Date Published:	2017-06-06
Start Page:	1605622
Language:	English
DOI:	10.1002/adma.201605622
PROVIDER:	scopus
PUBMED:	28374940
PMCID:	PMC5502103
DOI/URL:	https://www.scopus.com/inward/record.uri?eid=2-s2.0-85017359304&doi=10.1002%2fadma.201605622&partnerID=40&md5=446180914251bd043f35d8e5339b7565
Notes:	Article -- Export Date: 3 July 2017 -- Source: Scopus

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