WO 3 Nanopores Array Modified by Au Trisoctahedral NPs: Formation, Characterization and SERS Application.
- Resource Type
- Academic Journal
- Authors
- Krajczewski J; Faculty of Chemistry, University of Warsaw, 1 Pasteur St., 02-093 Warsaw, Poland.; Ambroziak R; Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.; Turczyniak-Surdacka S; Faculty of Chemistry, University of Warsaw, 1 Pasteur St., 02-093 Warsaw, Poland.; Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, 101 Żwirki i Wigury Street, 20-089 Warsaw, Poland.; Dziubałtowska M; Faculty of Chemistry, University of Warsaw, 1 Pasteur St., 02-093 Warsaw, Poland.
- Source
- Publisher: MDPI Country of Publication: Switzerland NLM ID: 101555929 Publication Model: Electronic Cited Medium: Print ISSN: 1996-1944 (Print) Linking ISSN: 19961944 NLM ISO Abbreviation: Materials (Basel) Subsets: PubMed not MEDLINE
- Subject
- Language
- English
- ISSN
- 1996-1944
The WO 3 nanopores array was obtained by an anodization method in aqueous solution with addition of F - ions. Several factors affecting the final morphology of the samples were tested such as potential, time, and F - concentrations. The morphology of the formed nanopores arrays was examined by SEM microscopy. It was found that the optimal time of anodization process is in the range of 0.5-1 h. The nanopores size increased with the increasing potential. The XPS measurements do not show any contamination by F - on the surface, which is common for WO x samples formed by an anodization method. Such a layer was successfully modified by anisotropic gold trisoctahedral NPs of various sizes. The Au NPs were obtained by seed-mediated growth method. The shape and size of Au NPs was analysed by TEM microscopy and optical properties by UV-VIS spectroscopy. It was found that the WO 3 -Au platform has excellent SERS activity. The R6G molecules could be detected even in the range of 10 -9 M.