Issue 12, 2002

Nano-Raman imaging of Cu–TCNQ clusters in TCNQ thin films by scanning near-field optical microscopy

Abstract

We have combined scanning near-field optical microscopy (SNOM) techniques with Raman scattering in order to measure the topography and the local optical properties of solid samples together with the chemical properties of molecular adsorbates, on subwavelength scales. The proposed experimental setup is simple, but very sensitive. In particular, we have focussed our attention on the optimization of the collection and detection of the scattered light, in order to circumvent the limited imaging capabilities of the SNOM due to the low cross-section of the Raman effect. The sample we will report on is a tetracyanoquinodimethane (TCNQ) thin film kept in contact with Cu powder in order to give rise to local complexes of Cu–TCNQ. A comparative investigation based on independent micro- and nano-Raman maps, allows us to chemically discriminate the aggregates and to assess the enhanced lateral resolution of the SNOM in the nanometre range.

Article information

Article type
Paper
Submitted
15 Nov 2001
Accepted
25 Feb 2002
First published
07 May 2002

Phys. Chem. Chem. Phys., 2002,4, 2747-2753

Nano-Raman imaging of Cu–TCNQ clusters in TCNQ thin films by scanning near-field optical microscopy

P. G. Gucciardi, S. Trusso, C. Vasi, S. Patanè and M. Allegrini, Phys. Chem. Chem. Phys., 2002, 4, 2747 DOI: 10.1039/B110475F

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.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements