Shape-controlled continuous synthesis of metal nanostructures
Name
Jensen_Shape-Controlled.pdf
Size
5.71 MB
Format
Adobe PDF
Checksum (MD5)
9f78090af129421f6b3cf924ee38a397
Author(s)
Sebastian Cabeza, Victor
Smith, Christopher D
Jensen, Klavs F
Date Issued
February 2016
Journal
Nanoscale
Publisher
Royal Society of Chemistry
Citation
Sebastian, Victor, Christopher D. Smith, and Klavs F. Jensen. “Shape-Controlled Continuous Synthesis of Metal Nanostructures.” Nanoscale 8.14 (2016): 7534–7543. © 2016 The Royal Society of Chemistry
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Terms of Use
Creative Commons Attribution 3.0 Unported licence
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1039/C5NR08531D
