Real-Time Dynamics of Galvanic Replacement Reactions of Silver Nanocubes and Au Studied by Liquid-Cell Transmission Electron Microscopy

Shu Fen Tan; Guanhua Lin; Michel Bosman; Utkur Mirsaidov; Christian A. Nijhuis

doi:10.1021/acsnano.6b03020

Real-Time Dynamics of Galvanic Replacement Reactions of Silver Nanocubes and Au Studied by Liquid-Cell Transmission Electron Microscopy

Shu Fen Tan, Guanhua Lin, Michel Bosman, Utkur Mirsaidov^*, Christian A. Nijhuis^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

59 Citations (Scopus)

Abstract

We study the galvanic replacement reaction of silver nanocubes in dilute, aqueous ethylenediaminetetraacetic acid disodium salt (EDTA)-capped gold aurate solutions using in situ liquid-cell electron microscopy. Au/Ag etched nanostructures with concave faces are formed via (1) etching that starts from the faces of the nanocubes, followed by (2) the deposition of an Au layer as a result of galvanic replacement, and (3) Au deposition via particle coalescence and monomer attachment where small nanoparticles are formed during the reaction as a result of radiolysis. Analysis of the Ag removal rate and Au deposition rate provides a quantitative picture of the growth process and shows that the morphology and composition of the final product are dependent on the stoichiometric ratio between Au and Ag.

Original language	English
Pages (from-to)	7689-7695
Journal	ACS nano
Volume	10
Issue number	8
DOIs	https://doi.org/10.1021/acsnano.6b03020
Publication status	Published - 23 Aug 2016
Externally published	Yes

Keywords

galvanic replacement
nanoparticle growth
in situ TEM
growth kinetics
reaction dynamics

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10.1021/acsnano.6b03020

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title = "Real-Time Dynamics of Galvanic Replacement Reactions of Silver Nanocubes and Au Studied by Liquid-Cell Transmission Electron Microscopy",

abstract = "We study the galvanic replacement reaction of silver nanocubes in dilute, aqueous ethylenediaminetetraacetic acid disodium salt (EDTA)-capped gold aurate solutions using in situ liquid-cell electron microscopy. Au/Ag etched nanostructures with concave faces are formed via (1) etching that starts from the faces of the nanocubes, followed by (2) the deposition of an Au layer as a result of galvanic replacement, and (3) Au deposition via particle coalescence and monomer attachment where small nanoparticles are formed during the reaction as a result of radiolysis. Analysis of the Ag removal rate and Au deposition rate provides a quantitative picture of the growth process and shows that the morphology and composition of the final product are dependent on the stoichiometric ratio between Au and Ag.",

keywords = "galvanic replacement, nanoparticle growth, in situ TEM, growth kinetics, reaction dynamics",

author = "Tan, {Shu Fen} and Guanhua Lin and Michel Bosman and Utkur Mirsaidov and Nijhuis, {Christian A.}",

year = "2016",

month = aug,

day = "23",

doi = "10.1021/acsnano.6b03020",

language = "English",

volume = "10",

pages = "7689--7695",

journal = "ACS nano",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Real-Time Dynamics of Galvanic Replacement Reactions of Silver Nanocubes and Au Studied by Liquid-Cell Transmission Electron Microscopy

AU - Tan, Shu Fen

AU - Lin, Guanhua

AU - Bosman, Michel

AU - Mirsaidov, Utkur

AU - Nijhuis, Christian A.

PY - 2016/8/23

Y1 - 2016/8/23

N2 - We study the galvanic replacement reaction of silver nanocubes in dilute, aqueous ethylenediaminetetraacetic acid disodium salt (EDTA)-capped gold aurate solutions using in situ liquid-cell electron microscopy. Au/Ag etched nanostructures with concave faces are formed via (1) etching that starts from the faces of the nanocubes, followed by (2) the deposition of an Au layer as a result of galvanic replacement, and (3) Au deposition via particle coalescence and monomer attachment where small nanoparticles are formed during the reaction as a result of radiolysis. Analysis of the Ag removal rate and Au deposition rate provides a quantitative picture of the growth process and shows that the morphology and composition of the final product are dependent on the stoichiometric ratio between Au and Ag.

AB - We study the galvanic replacement reaction of silver nanocubes in dilute, aqueous ethylenediaminetetraacetic acid disodium salt (EDTA)-capped gold aurate solutions using in situ liquid-cell electron microscopy. Au/Ag etched nanostructures with concave faces are formed via (1) etching that starts from the faces of the nanocubes, followed by (2) the deposition of an Au layer as a result of galvanic replacement, and (3) Au deposition via particle coalescence and monomer attachment where small nanoparticles are formed during the reaction as a result of radiolysis. Analysis of the Ag removal rate and Au deposition rate provides a quantitative picture of the growth process and shows that the morphology and composition of the final product are dependent on the stoichiometric ratio between Au and Ag.

KW - galvanic replacement

KW - nanoparticle growth

KW - in situ TEM

KW - growth kinetics

KW - reaction dynamics

U2 - 10.1021/acsnano.6b03020

DO - 10.1021/acsnano.6b03020

M3 - Article

SN - 1936-0851

VL - 10

SP - 7689

EP - 7695

JO - ACS nano

JF - ACS nano

IS - 8

ER -

Real-Time Dynamics of Galvanic Replacement Reactions of Silver Nanocubes and Au Studied by Liquid-Cell Transmission Electron Microscopy

Abstract

Keywords

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