Issue 10, 2011
From the journal:

Nanoscale

Nanoscale phase separation in coated Ag nanoparticles†

Yuri Antonio Diaz-Fernandez,a   Piersandro Pallavicini,a   Luca Pasotti,a   Chiara Milanese,b   Eva Pellicer,c   Maria D. Baró,c   Yang Rend  and  Lorenzo Malavasi*b  

* Corresponding authors

a inLAB, Inorganic Nanochemistry Laboratory, Dipartimento di Chimica, Università di Pavia, Viale Taramelli, 12, Pavia, Italy

b Dipartimento di Chimica—Sezione di Chimica Fisica “M. Rolla”, INSTM (UdR Pavia) and IENI-CNR, Università di Pavia, Viale Taramelli 16, Pavia, Italy
E-mail: lorenzo.malavasi@unipv.it
Fax: +39-(0)382-987575
Tel: +39-(0)382-987921

c Departament de Física, Facultat de Ciències, Universitat Autonoma de Barcelona, Bellaterra, Spain

d Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA

Abstract

In this paper we report the structural investigation of cysteine and glutathione capped Ag nanoparticles (NPs) by means of transmission electron microscopy (TEM), synchrotron X-ray diffraction (XRD) and pair distribution function (PDF) analysis. The combined use of these probes allowed us to observe the presence of two crystal structures in the coated AgNPs, i.e., the cubic and the hexagonal crystal structures of Ag. In particular, it was possible to demonstrate that the coated AgNPs are a nanoscale phase separated system where the two phases coexist within the single grain. In addition, the relative bulk amount of the fcc and hcp phases has been estimated and a possible correlation with the capping agent proposed.

Graphical abstract: Nanoscale phase separation in coated Ag nanoparticles

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Article information

DOI
https://doi.org/10.1039/C1NR10832H
Article type
Paper
Submitted
15 Jul 2011
Accepted
26 Jul 2011
First published
30 Aug 2011

Nanoscale, 2011,3, 4220-4225

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Nanoscale phase separation in coated Ag nanoparticles

Y. A. Diaz-Fernandez, P. Pallavicini, L. Pasotti, C. Milanese, E. Pellicer, M. D. Baró, Y. Ren and L. Malavasi, Nanoscale, 2011, 3, 4220 DOI: 10.1039/C1NR10832H

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