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Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization

Sol-immobilization is increasingly used to achieve supported metal nanoparticles (NPs) with controllable size and shape; it affords a high degree of control of the metal particle size and yields a narrow particle size distribution. Using state-of-the-art beamlines, we demonstrate how X-ray absorptio...

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Autores principales: Tierney, George F., Decarolis, Donato, Abdullah, Norli, Rogers, Scott M., Hayama, Shusaku, Briceno de Gutierrez, Martha, Villa, Alberto, Catlow, C. Richard A., Collier, Paul, Dimitratos, Nikolaos, Wells, Peter P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419830/
https://www.ncbi.nlm.nih.gov/pubmed/36132726
http://dx.doi.org/10.1039/c9na00159j
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author Tierney, George F.
Decarolis, Donato
Abdullah, Norli
Rogers, Scott M.
Hayama, Shusaku
Briceno de Gutierrez, Martha
Villa, Alberto
Catlow, C. Richard A.
Collier, Paul
Dimitratos, Nikolaos
Wells, Peter P.
author_facet Tierney, George F.
Decarolis, Donato
Abdullah, Norli
Rogers, Scott M.
Hayama, Shusaku
Briceno de Gutierrez, Martha
Villa, Alberto
Catlow, C. Richard A.
Collier, Paul
Dimitratos, Nikolaos
Wells, Peter P.
author_sort Tierney, George F.
collection PubMed
description Sol-immobilization is increasingly used to achieve supported metal nanoparticles (NPs) with controllable size and shape; it affords a high degree of control of the metal particle size and yields a narrow particle size distribution. Using state-of-the-art beamlines, we demonstrate how X-ray absorption fine structure (XAFS) techniques are now able to provide accurate structural information on nano-sized colloidal Au solutions at μM concentrations. This study demonstrates: (i) the size of Au colloids can be accurately tuned by adjusting the temperature of reduction, (ii) Au concentration, from 50 μM to 1000 μM, has little influence on the average size of colloidal Au NPs in solution and (iii) the immobilization step is responsible for significant growth in Au particle size, which is further exacerbated at increased Au concentrations. The work presented demonstrates that an increased understanding of the primary steps in sol-immobilization allows improved optimization of materials for catalytic applications.
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spelling pubmed-94198302022-09-20 Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization Tierney, George F. Decarolis, Donato Abdullah, Norli Rogers, Scott M. Hayama, Shusaku Briceno de Gutierrez, Martha Villa, Alberto Catlow, C. Richard A. Collier, Paul Dimitratos, Nikolaos Wells, Peter P. Nanoscale Adv Chemistry Sol-immobilization is increasingly used to achieve supported metal nanoparticles (NPs) with controllable size and shape; it affords a high degree of control of the metal particle size and yields a narrow particle size distribution. Using state-of-the-art beamlines, we demonstrate how X-ray absorption fine structure (XAFS) techniques are now able to provide accurate structural information on nano-sized colloidal Au solutions at μM concentrations. This study demonstrates: (i) the size of Au colloids can be accurately tuned by adjusting the temperature of reduction, (ii) Au concentration, from 50 μM to 1000 μM, has little influence on the average size of colloidal Au NPs in solution and (iii) the immobilization step is responsible for significant growth in Au particle size, which is further exacerbated at increased Au concentrations. The work presented demonstrates that an increased understanding of the primary steps in sol-immobilization allows improved optimization of materials for catalytic applications. RSC 2019-05-21 /pmc/articles/PMC9419830/ /pubmed/36132726 http://dx.doi.org/10.1039/c9na00159j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Tierney, George F.
Decarolis, Donato
Abdullah, Norli
Rogers, Scott M.
Hayama, Shusaku
Briceno de Gutierrez, Martha
Villa, Alberto
Catlow, C. Richard A.
Collier, Paul
Dimitratos, Nikolaos
Wells, Peter P.
Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization
title Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization
title_full Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization
title_fullStr Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization
title_full_unstemmed Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization
title_short Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization
title_sort extracting structural information of au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419830/
https://www.ncbi.nlm.nih.gov/pubmed/36132726
http://dx.doi.org/10.1039/c9na00159j
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