Issue 29, 2012
From the journal:

Journal of Materials Chemistry

Synthesis and characterization of Au-core Ag-shell nanoparticles from unmodified apoferritin

Tao Li,a   Soma Chattopadhyay,bc   Tomohiro Shibata,bc   Russell E. Cook,d   Jeffrey T. Miller,e   Nisaraporn Suthiwangcharoen,f   Sungsik Lee,a   Randall E. Winansa  and  Byeongdu Lee*a  

* Corresponding authors

a X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA
E-mail: blee@aps.anl.gov

b CSRRI-IIT, MRCAT, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA

c BCPS Department, Illinois Institute of Technology, Chicago, IL 60616, USA

d Electron Microscopy Center, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA

e Chemical Science and Engineering Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA

f Department of Chemistry and Biochemistry and Nanocenter, University of South Carolina, 631 Sumter Street, Columbia, South Carolina, USA

Abstract

Narrow-size distributed, water-soluble Au-core Ag-shell nanoparticles with a size range from 1 to 5 nm are synthesized using unmodified apoferritin as a template. Fast protein liquid chromatography reveals that the nanoparticles are formed inside the apoferritin cavity and are stable in aqueous solution. Electron microscopy shows that the particles are uniform in size and composed of both Au and Ag. In addition, extended X-ray absorption fine structure confirms that the particles have a core–shell structure with a Au core covered with a Ag shell. By varying the loading amounts of the silver precursor, the Ag shell thickness is controlled from one layer to several layers.

Graphical abstract: Synthesis and characterization of Au-core Ag-shell nanoparticles from unmodified apoferritin

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Article information

DOI
https://doi.org/10.1039/C2JM30633F
Article type
Paper
Submitted
01 Feb 2012
Accepted
11 May 2012
First published
16 May 2012

J. Mater. Chem., 2012,22, 14458-14464

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Synthesis and characterization of Au-core Ag-shell nanoparticles from unmodified apoferritin

T. Li, S. Chattopadhyay, T. Shibata, R. E. Cook, J. T. Miller, N. Suthiwangcharoen, S. Lee, R. E. Winans and B. Lee, J. Mater. Chem., 2012, 22, 14458 DOI: 10.1039/C2JM30633F

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