Issue 1, 2014
From the journal:

Nanoscale

Double-layered nanoparticle stacks for surface enhanced infrared absorption spectroscopy†‡

Johannes Srajer,‡ab   Andreas Schwaighofer,‡a   Georg Ramer,c   Stefan Rotter,d   Bilal Guenay,a   Albert Kriegner,a   Wolfgang Knoll,a   Bernhard Lendlc  and  Christoph Nowak*ab  

* Corresponding authors

a Austrian Institute of Technology GmbH, AIT, Donau-City Str. 1, 1220 Vienna, Austria
E-mail: C.Nowak@ait.ac.at

b Center of Electrochemical Surface Technology, CEST, Viktor-Kaplan-Straße 2, 2700 Wiener Neustadt, Austria

c Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164 AC, 1060 Vienna, Austria

d Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10/136, A-1040 Vienna, Austria

Abstract

We demonstrate that double-layered stacks of gold and insulator nanoparticles arranged on a flat gold surface dramatically enhance the sensitivity in absorption infrared microscopy. Through morphological variations of the nanoparticles, the frequency of the plasmon resonances can be tuned to match the frequency of the molecular vibration in the mid-infrared region. The results show that the nanostructures enhance the absorption signal of the molecules by a factor of up to ∼2.2 × 106, while preserving their characteristic line-shape remarkably well.

Graphical abstract: Double-layered nanoparticle stacks for surface enhanced infrared absorption spectroscopy

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Article information

DOI
https://doi.org/10.1039/C3NR04726A
Article type
Communication
Submitted
04 Sep 2013
Accepted
19 Oct 2013
First published
22 Oct 2013

Nanoscale, 2014,6, 127-131

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Double-layered nanoparticle stacks for surface enhanced infrared absorption spectroscopy

J. Srajer, A. Schwaighofer, G. Ramer, S. Rotter, B. Guenay, A. Kriegner, W. Knoll, B. Lendl and C. Nowak, Nanoscale, 2014, 6, 127 DOI: 10.1039/C3NR04726A

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