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Kinetic effects of halide ions on the morphological evolution of silver nanoplates

Tang, Bin, Xu, Shuping, An, Jing, Zhao, Bing, Xu, Weiqing and Lombardi, John R. 2009, Kinetic effects of halide ions on the morphological evolution of silver nanoplates, Physical chemistry chemical physics, vol. 11, no. 44, pp. 10286-10292.

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Title Kinetic effects of halide ions on the morphological evolution of silver nanoplates
Author(s) Tang, BinORCID iD for Tang, Bin orcid.org/0000-0001-7111-8223
Xu, Shuping
An, Jing
Zhao, Bing
Xu, Weiqing
Lombardi, John R.
Journal name Physical chemistry chemical physics
Volume number 11
Issue number 44
Start page 10286
End page 10292
Total pages 7
Publisher Royal Society of Chemistry
Place of publication London, England
Publication date 2009
ISSN 1463-9076
1463-9084
Summary Time-resolved extinction spectroscopy is employed to study the reaction kinetics in the shape-conversion reaction involving halide ions (including Cl-, Br- and I-) etching (sculpturing) silver nanoplates. A series of time-resolved extinction spectra are obtained during the in situ etching process and the evolution of surface plasmon resonance (SPR) of the silver nanoparticles is analyzed. Spectral analysis indicates that the conversion of nanoprisms starts simultaneously with the emergence of nanodisks when the halide ions are added. The etching rate of different halide ions is evaluated through the in-plane dipole resonance peak intensity of silver nanoplates vs. the reaction time (dI/dt). The relationship between the etching rate and the halide ion concentration shows that the halide ion etching reaction can be considered as a pseudo-first-order reaction. The effect of different halide ions on the shape-conversion of silver nanoplates is compared in detail. The activation energy of the etching reaction is calculated, which indicates that the etching ability of different halide ions is on the order of Cl - < I- < Br-.
Language eng
Field of Research 030703 Reaction Kinetics and Dynamics
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2009, Owner Societies
Persistent URL http://hdl.handle.net/10536/DRO/DU:30044230

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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