Research Article

Raman investigations of TiO2 nanotube substrates covered with thin Ag or Cu deposits

  1. A. Roguska1,2,
  2. A. Kudelski3,
  3. M. Pisarek1,2,
  4. M. Lewandowska2,
  5. M. Dolata4,
  6. M. Janik-Czachor1,*

Article first published online: 26 MAY 2009

DOI: 10.1002/jrs.2314

Issue

Journal of Raman Spectroscopy

Journal of Raman Spectroscopy

Volume 40, Issue 11, pages 1652–1656, November 2009

Additional Information

How to Cite

Roguska, A., Kudelski, A., Pisarek, M., Lewandowska, M., Dolata, M. and Janik-Czachor, M. (2009), Raman investigations of TiO2 nanotube substrates covered with thin Ag or Cu deposits. J. Raman Spectrosc., 40: 1652–1656. doi: 10.1002/jrs.2314

Author Information

  1. 1

    Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland

  2. 2

    Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland

  3. 3

    Department of Chemistry, University of Warsaw, Pasteur 1, 02-093 Warsaw, Poland

  4. 4

    Laboratory of Physics, Warsaw University of Life Sciences, Nowoursynowska 166, 02-787 Warsaw, Poland

*Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.

Publication History

  1. Issue published online: 11 NOV 2009
  2. Article first published online: 26 MAY 2009
  3. Manuscript Accepted: 17 MAR 2009
  4. Manuscript Received: 9 JAN 2009

Funded by

  • Polish Ministry of Science and Higher Education. Grant Number: N N507 355035

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Keywords:

  • silver clusters;
  • TiO2–nanotubes;
  • surface-enhanced Raman scattering (SERS);
  • SEM morphological examinations;
  • AES and SAM surface analysis

Abstract

A tubular array of TiO2 nanotubes on Ti matrix was used as a support for Ag or Cu sputter-deposited layers intended for surface-enhanced Raman scattering (SERS) investigations. The composite samples of Ag/TiO2–nanotube/Ti and Cu/TiO2–nanotube/Ti were studied with the aid of scanning electron microscopy (SEM) and Auger electron spectroscopy (AES) [and scanning Auger microscopy (SAM)] to reveal their characteristic morphological and chemical features. Raman spectra of pyridine (as a probe molecule) were measured after it had been adsorbed on the TiO2–nanotube/Ti substrates covered with thin Ag or Cu deposit as well as on the bulk electrochemically roughened Ag or Cu reference substrates. It was found that the SERS spectra measured for pyridine adsorbed on the bulk silver substrate were significantly different than the spectra measured on the TiO2–nanotube/Ti substrates covered the Ag layer. The spectra measured for pyridine adsorbed on the Ag/TiO2–nanotube/Ti suggest that on the surface of such a composite substrate there are many Lewis acidic sites. Spectra typical for pyridine adsorbed on acidic sites were observed even after deposition of a relatively thick silver layer (e.g. an Ag layer with an average thickness of 80 nm) on the TiO2–nanotube/Ti support. Our findings suggest that TiO2–nanotube/Ti support is a promising substrate for the preparation of metallic nano-clusters on a support containing acidic active sites. Copyright © 2009 John Wiley & Sons, Ltd.

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