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Title: Gold Nanoparticle Formation Kinetics and Mechanism: A Critical Analysis of the “Redox Crystallization” Mechanism

Abstract

A 2013 paper proposed a “redox crystallization” (R-C) mechanism for the formation of Au0n nanoparticles from the reduction of a AuCl4 precursor. That study used an unconventional analysis of the valuable, expertly obtained kinetics data reported, and came up with multiple claims and insights collected under the putatively new R-C mechanism. If confirmed, those claims and the R-C mechanism provide a valuable addition to the knowledge of gold nanoparticle formation kinetics and mechanisms. On the other hand, if the methodology used to support the R-C mechanism is flawed so that its resultant conclusions are incorrect, then the R-C mechanism needs to be discarded until compelling evidence for it can be gathered, evidence that would have to include the disproof of the other dominant mechanism(s) of nanoparticle formation. The present work provides a critical analysis of the evidence previously offered for the R-C mechanism, efforts that are of interest to the areas of Au0n nanoparticles, the kinetics and mechanisms of nanoparticle formation and, as it turns out, more generally to those interested in kinetic and mechanistic studies.

Authors:
 [1]; ORCiD logo [2]
  1. Department of Chemistry and Biochemistry, University of Northern Colorado, Greeley, Colorado 80639, United States
  2. Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
Publication Date:
Research Org.:
Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
OSTI Identifier:
1419703
Alternate Identifier(s):
OSTI ID: 1512947
Grant/Contract Number:  
SE-FG402-03ER15453; FG02-03ER15453
Resource Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Name: ACS Omega Journal Volume: 3 Journal Issue: 2; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Watzky, Murielle A., and Finke, Richard G. Gold Nanoparticle Formation Kinetics and Mechanism: A Critical Analysis of the “Redox Crystallization” Mechanism. United States: N. p., 2018. Web. https://doi.org/10.1021/acsomega.7b01772.
Watzky, Murielle A., & Finke, Richard G. Gold Nanoparticle Formation Kinetics and Mechanism: A Critical Analysis of the “Redox Crystallization” Mechanism. United States. https://doi.org/10.1021/acsomega.7b01772
Watzky, Murielle A., and Finke, Richard G. Tue . "Gold Nanoparticle Formation Kinetics and Mechanism: A Critical Analysis of the “Redox Crystallization” Mechanism". United States. https://doi.org/10.1021/acsomega.7b01772.
@article{osti_1419703,
title = {Gold Nanoparticle Formation Kinetics and Mechanism: A Critical Analysis of the “Redox Crystallization” Mechanism},
author = {Watzky, Murielle A. and Finke, Richard G.},
abstractNote = {A 2013 paper proposed a “redox crystallization” (R-C) mechanism for the formation of Au0n nanoparticles from the reduction of a AuCl4– precursor. That study used an unconventional analysis of the valuable, expertly obtained kinetics data reported, and came up with multiple claims and insights collected under the putatively new R-C mechanism. If confirmed, those claims and the R-C mechanism provide a valuable addition to the knowledge of gold nanoparticle formation kinetics and mechanisms. On the other hand, if the methodology used to support the R-C mechanism is flawed so that its resultant conclusions are incorrect, then the R-C mechanism needs to be discarded until compelling evidence for it can be gathered, evidence that would have to include the disproof of the other dominant mechanism(s) of nanoparticle formation. The present work provides a critical analysis of the evidence previously offered for the R-C mechanism, efforts that are of interest to the areas of Au0n nanoparticles, the kinetics and mechanisms of nanoparticle formation and, as it turns out, more generally to those interested in kinetic and mechanistic studies.},
doi = {10.1021/acsomega.7b01772},
journal = {ACS Omega},
number = 2,
volume = 3,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1021/acsomega.7b01772

Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: Formation of gold nanoparticles from an aqueous solution of HAuCl4 in the presence of L-ascorbic acid (AA) and polyvinylpyrrolidone (PVP). (a) Time evolution of the absorbance at 526 nm (surface plasmon resonance peak of gold nanoparticles). (b) Time evolution of the absorbance at 526 nm, normalized to themore » absorbance maximum in (a), labeled “zeroth-order” kinetics. (c) Time evolution of ln(1/(1 − $x$)), where $x$ represents the normalized absorbance in (b), labeled “first-order” kinetics. (d) Time evolution of (1/(1 − $x$)) − 1, where $x$ represents the normalized absorbance in (b), labeled “second-order” kinetics. Reproduced with permission from ref 1. Copyright 2013 Elsevier.« less

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