An investigation of the structure of stearate monolayers on Au@ZrO2 and Ag@ZrO2 core–shell nanoparticles

A. Sreekumaran Nair; T. Pradeep; I. MacLaren

doi:10.1039/B313850J

You do not have JavaScript enabled. Please enable JavaScript to access the full features of the site or access our non-JavaScript page.

An investigation of the structure of stearate monolayers on Au@ZrO₂ and Ag@ZrO₂ core–shell nanoparticles†

A. Sreekumaran Nair,^a T. Pradeep*^a and I. MacLaren^b

Author affiliations

* Corresponding authors

^a Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras, Chennai, India
E-mail: pradeep@iitm.ac.in

^b Institute for Materials Science, Darmstadt University of Technology, Darmstadt, Germany

Abstract

Monolayer protected nanoparticles, Au@ZrO₂@stearate and Ag@ZrO₂@stearate, in which the core–shell nanoparticles, Au@ZrO₂ and Ag@ZrO₂ (ZrO₂ coated Au and Ag nanoparticles) are functionalized with stearic acid, have been synthesized and characterized. The air-dried powders, freely dispersible in several organic solvents (both polar and non-polar), are stable for extended periods. The materials were characterized by spectroscopic, microscopic, diffraction and thermal analysis techniques. The monolayer cover is stable up to 200 °C. Monolayers do not exhibit strong inter-chain interactions, unlike in the case of those on metal nanoparticles, suggesting that their surface anchoring sites are widely spaced. As a result, temperature-dependent infrared spectra of the monolayers are featureless. The oxide surface is accessible for small molecules in solution even after stearic acid coverage. Freely dispersible nanoparticles with oxide shells may offer new possibilities in catalysis, photophysics and materials science.

Download options Please wait...

Supplementary files

Laser desorption mass spectrum, differential scanning calorimetric traces, and thermogravimetric analyses of the materials (3 pages) PDF (117K)

Article information

DOI: https://doi.org/10.1039/B313850J
Article type: Paper
Submitted: 31 Oct 2003
Accepted: 18 Dec 2003
First published: 30 Jan 2004

Download Citation

J. Mater. Chem., 2004,14, 857-862

Permissions

Request permissions

An investigation of the structure of stearate monolayers on Au@ZrO₂ and Ag@ZrO₂ core–shell nanoparticles

A. S. Nair, T. Pradeep and I. MacLaren, J. Mater. Chem., 2004, 14, 857 DOI: 10.1039/B313850J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Fetching data from CrossRef.
This may take some time to load.

Journal of Materials Chemistry