Title: Double-layered nanoparticle stacks for surface enhanced infrared absorption spectroscopy
Language: English
Authors: Srajer, Johannes
Schwaighofer, Andreas  
Ramer, Georg  
Rotter, Stefan  
Guenay, Bilal 
Kriegner, Albert 
Knoll, Wolfgang 
Lendl, Bernhard  
Nowak, Christoph
Category: Short/Brief/Rapid Communication
Issue Date: 2014
Journal: Nanoscale
ISSN: 2040-3372
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 lineshape remarkably well.
DOI: 10.1039/c3nr04726a
Library ID: AC15517661
URN: urn:nbn:at:at-ubtuw:3-7455
Organisation: E164 - Institut für Chemische Technologien und Analytik 
Publication Type: Article
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