Shape-controlled continuous synthesis of metal nanostructures

Sebastian, V. (Universidad de Zaragoza) ; Smith, C.D. ; Jensen, K.F.

Resumen: A segmented flow-based microreactor is used for the continuous production of faceted nanocrystals. Flow segmentation is proposed as a versatile tool to manipulate the reduction kinetics and control the growth of faceted nanostructures; tuning the size and shape. Switching the gas from oxygen to carbon monoxide permits the adjustment in nanostructure growth from 1D (nanorods) to 2D (nanosheets). CO is a key factor in the formation of Pd nanosheets and Pt nanocubes; operating as a second phase, a reductant, and a capping agent. This combination confines the growth to specific structures. In addition, the segmented flow microfluidic reactor inherently has the ability to operate in a reproducible manner at elevated temperatures and pressures whilst confining potentially toxic reactants, such as CO, in nanoliter slugs. This continuous system successfully synthesised Pd nanorods with an aspect ratio of 6; thin palladium nanosheets with a thickness of 1.5 nm; and Pt nanocubes with a 5.6 nm edge length, all in a synthesis time as low as 150 s.

Idioma: Inglés

DOI: 10.1039/c5nr08531d

Año: 2016

Publicado en: NANOSCALE 8, 14 (2016), 7534-7543
ISSN: 2040-3364

Factor impacto JCR: 7.367 (2016)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 23 / 275 = 0.084 (2016) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 13 / 87 = 0.149 (2016) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 21 / 166 = 0.127 (2016) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 13 / 147 = 0.088 (2016) - Q1 - T1

Factor impacto SCIMAGO: 2.789 - Nanoscience and Nanotechnology (Q1) - Materials Science (miscellaneous) (Q1)

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)