ZrO2 bubbles from core–shell nanoparticles

A. Sreekumaran Nair; Renjis T. Tom; V. Suryanarayanan; T. Pradeep

doi:10.1039/B210734A

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ZrO₂ bubbles from core–shell nanoparticles†

A. Sreekumaran Nair,^a Renjis T. Tom,^a V. Suryanarayanan^a and T. Pradeep*^a

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* Corresponding authors

^a Department of Chemistry and Regional Sophisticated Instrumentation Centre, Indian Institute of Technology Madras, Chennai 600 036, India
E-mail: pradeep@iitm.ac.in
Fax: +91-44-2257 0509 or 0545

Abstract

Selective removal of metal cores from core–shell Ag@ZrO₂ (ZrO₂ coated Ag) and Au@ZrO₂ (ZrO₂ coated Au) nanoparticles result in stable and freely suspendable oxide nanobubbles of varying dimensions, both in thickness and in diameter. The metal core is removed by a newly found reaction in which halocarbons, generally chlorides, oxidise the metal core and leach out the metal ions. Reduction in the surface plasmon excitation intensity and decrease in the voltammetric current during metal core removal were used to study the process.

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Supplementary files

TIME DEPENDENT UV-VISIBLE SPECTRA OF THE REACTION OF Au@ZrO 2 WITH CCl 4 PDF (1688K)

Article information

DOI: https://doi.org/10.1039/B210734A
Article type: Paper
Submitted: 31 Oct 2002
Accepted: 06 Dec 2002
First published: 07 Jan 2003

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J. Mater. Chem., 2003,13, 297-300

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ZrO₂ bubbles from core–shell nanoparticles

A. S. Nair, R. T. Tom, V. Suryanarayanan and T. Pradeep, J. Mater. Chem., 2003, 13, 297 DOI: 10.1039/B210734A

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Journal of Materials Chemistry