Chemical- or Radiation-Assisted Selective Dealloying in Bimetallic Nanoclusters

G. Mattei, G. De Marchi, C. Maurizio, P. Mazzoldi, C. Sada, V. Bello, and G. Battaglin
Phys. Rev. Lett. 90, 085502 – Published 25 February 2003

Abstract

A selective dealloying in bimetallic nanoclusters prepared by ion implantation has been found upon thermal annealing in oxidizing atmosphere or irradiation with light ions. In the first process, the incoming oxygen interacts preferentially with copper promoting Cu2O formation, therefore extracting copper from the alloy. In the second process the irradiation with Ne ions promotes a preferential extraction of Au from the alloy, resulting in the formation of Au-enriched “satellite” nanoparticles around the original AuxCu1x cluster.

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  • Received 28 July 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.085502

©2003 American Physical Society

Authors & Affiliations

G. Mattei*, G. De Marchi, C. Maurizio, P. Mazzoldi, C. Sada, and V. Bello

  • INFM, Dipartimento di Fisica, Università di Padova, via Marzolo 8, I-35131, Padova, Italy

G. Battaglin

  • INFM, Dipartimento di Chimica Fisica, Università di Venezia, Dorsoduro 2137, I-30123 Venezia, Italy

  • *Corresponding author. Email address: mattei@padova.infm.it

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Issue

Vol. 90, Iss. 8 — 28 February 2003

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