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Proc Natl Acad Sci U S A. 2019 Jan 2;116(1):40-45. doi: 10.1073/pnas.1815358116. Epub 2018 Dec 17.

Catalyst discovery through megalibraries of nanomaterials.

Author information

1
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208.
2
International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208.
3
Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208.
4
Department of Chemistry, Northwestern University, Evanston, IL 60208.
5
Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 45433.
6
UES Inc., Dayton, OH 45432.
7
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208; chadnano@northwestern.edu.

Abstract

The nanomaterial landscape is so vast that a high-throughput combinatorial approach is required to understand structure-function relationships. To address this challenge, an approach for the synthesis and screening of megalibraries of unique nanoscale features (>10,000,000) with tailorable location, size, and composition has been developed. Polymer pen lithography, a parallel lithographic technique, is combined with an ink spray-coating method to create pen arrays, where each pen has a different but deliberately chosen quantity and composition of ink. With this technique, gradients of Au-Cu bimetallic nanoparticles have been synthesized and then screened for activity by in situ Raman spectroscopy with respect to single-walled carbon nanotube (SWNT) growth. Au3Cu, a composition not previously known to catalyze SWNT growth, has been identified as the most active composition.

KEYWORDS:

carbon nanotube growth; catalysis; combinatorial screening; in situ Raman spectroscopy; multimetallic nanoparticle synthesis

PMID:
30559201
PMCID:
PMC6320520
DOI:
10.1073/pnas.1815358116
[Indexed for MEDLINE]
Free PMC Article

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