NDLI: TiO2 and Al2O3 nanoporous oxide layers decorated with silver nanoparticles

Content Provider	Springer Nature Link
Author	Pisarek, Marcin Holdynski, Marcin Roguska, Agata Kudelski, Andrzej Janik Czachor, Maria
Copyright Year	2014
Abstract	Self-organized nanoporous oxide layers (TiO2, Al2O3) exhibiting specific properties, obtained by anodic oxidation at a constant voltage in neutral electrolyte, may serve as attractive SERS substrates for investigating the interactions between an adsorbate and adsorbent, or as a stable platform for detecting various organic compounds. This paper presents the influence of the size of the nanotubes/nanopores and the structure of the porous oxide layers on the SERS enhancement factor, E F. We used pyridine and mercaptobenzoic acid as probe molecules, since they have a large cross-section for Raman scattering. To characterize the morphology and structure of the oxide layer substrates, before and after vacuum vapor deposition of silver nanoparticles, we applied scanning electron microscopy, X-ray diffraction and surface analytical techniques: AES, XPS and SERS. The results obtained show that for the same amount of Ag (0.02 mg/cm2) the size of the nanopores significantly affects the E F, which reaches, at a properly chosen nanopore size, distinctly higher values than that characteristic of a standard silver surface roughened by electrochemical cycling, i.e. E F > 106. The new Ag/MeO x –NT composites layer, ensure a good reproducibility of the SERS measurements and exhibit stability over a limited period of time.
Starting Page	3099
Ending Page	3109
Page Count	11
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	18
Issue Number	11
e-ISSN	14330768
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-02-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	SERS active substrates TiO2 and Al2O3 nanotubes: MeOx-NT Pyridine Mercaptobenzoic acid Physical Chemistry Electrochemistry Energy Storage Characterization and Evaluation of Materials Analytical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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