Au core Pd/Pt shell in trimetallic Au/Pd/Pt colloidal nanocomposites – Physicochemical characterization study

•Trimetallic Au/Pd/Pt colloidal nanocomposites have been prepared.•Nanocomposites were characterized by experimental and theoretical techniques.•Au forms core and Pd/Pt goes to the surface.•l-Cysteine interaction with trimetallic colloidal nanocomposites have been examined.•SERS validates the l-cyst...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2013-09, Vol.436, p.944-952
Main Authors: Loganathan, B., Karthikeyan, B.
Format: Article
Language:English
Subjects:
adsorption
Atomic force microscopy
Colloidal nanocomposites
Colloids
cysteine
Electron microscopy
energy
energy-dispersive X-ray analysis
Gold
irradiation
l-Cysteine adsorption
Nanocomposites
Palladium
Physical properties
Platinum
polymers
Raman spectroscopy
Scanning electron microscopy
Synthesis
transmission electron microscopy
X-radiation
X-ray photoelectron spectroscopy
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Summary:•Trimetallic Au/Pd/Pt colloidal nanocomposites have been prepared.•Nanocomposites were characterized by experimental and theoretical techniques.•Au forms core and Pd/Pt goes to the surface.•l-Cysteine interaction with trimetallic colloidal nanocomposites have been examined.•SERS validates the l-cysteine adsorption with Au core. This work demonstrates for the first time of synthesizing Pt containing trimetallic Au/Pd/Pt colloidal nanocomposites using polymer capping through microwave (MW) irradiation method. The resulting trimetallic nanocomposite were characterized by high-resolution transmission electron microscopy (HR-TEM), high-resolution scanning electron microscopy (HR-SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Addition of l-cysteine (l-Cys) in Au/Pd/Pt trimetallic nanocomposite has been done to examine the formation of bio nanocomposite, which has been characterized by surface-enhanced Raman spectroscopy (SERS), which reveals SH adsorption with Au core surrounded by Pd/Pt nanoshell.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2013.08.035