Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 34: Poster Session I (Graphene; Plasmonics and nanooptics; Coherence and coherent control in nanophotonics and plasmonics)
O 34.44: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster E
Enzymatically generated silver nanoparticles for surface enhanced Raman spectroscopy (SERS) — •Henrik Schneidewind1, Karina Weber1,2, Dana Cialla1,2, Marco Diegel1, Roland Mattheis1, Andreas Berger3, and Jürgen Popp1 — 1Institute of Photonic Technology (IPHT) Jena, Germany — 2Institute of Physical Chemistry and Abbe-Center of Photonics, Friedrich-Schiller University Jena, Germany — 3Max Planck Institute of Microstructure Physics Halle, Germany
Silver nanoparticles (Ag-NP) synthesized by an enzymatic induced growth process onto solid substrates form structures called as desert roses or nanoflowers. In order to customize the enzymatically grown nanoparticles to analytical applications in bio-molecular research, studies were carried out on the time evolution of the formation of the Ag-NP, their morphology, and their chemical composition. Therefore, Ag-NP films of different densities were investigated using SEM, TEM as well as energy dispersive X-ray spectroscopy. The surface coverage of substrates with Ag-NP and the maximum particle height were determined using Rutherford backscattering spectroscopy. It is shown, that the desert rose like Ag-NP consist of single crystalline silver plates containing only pure silver. Surface enhanced Raman spectroscopic (SERS) measurements of the vitamin riboflavin incubated on the Ag-NP are shown as an exemplary application for quantitative analysis.