21 August 2015 Plasmonic nanoparticles sensors utilizing hybrid modes, electrical excitation, and anisotropic particles
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Abstract
Surface Plasmon Resonance (SPR) in metallic nanostructures is an optical effect that can be exploited for the detection of small molecules. There is a broad range of metallic nanostructures supporting different SPR modes, and nanostructures can be even geometrically combined leading to the creation of new hybridised SPR modes. In our study, we investigated the properties of a hybridised SPR mode (gap modes GM) created by the placement of metallic nanoparticles onto metallic layers and its use as a sensitive sensor. A tunneling current passing through a metal-insulator-semiconductor structure can generate supported SPR modes that can be scattered through GM, which was experimentally confirmed. Moreover, we were able to experimentally follow the degradation of anisotropic (silver nanoprism) nanoparticles under ambient conditions in real time. Using atomic force microscopy and optical spectroscopy we observed an anisotropic corrosion that is starting from the tips of the nanoparticles.
Conference Presentation
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Andre Dathe, Andre Dathe, Pavel Kliuiev, Pavel Kliuiev, Jacqueline Jatschka, Jacqueline Jatschka, Uwe Hübner, Uwe Hübner, Mario Ziegler, Mario Ziegler, Matthias Thiele, Matthias Thiele, Steffen Trautmann, Steffen Trautmann, Janina Wirth, Janina Wirth, Frank Garwe, Frank Garwe, Andrea Csaki, Andrea Csaki, Ondrej Stranik, Ondrej Stranik, Wolfgang Fritzsche, Wolfgang Fritzsche, "Plasmonic nanoparticles sensors utilizing hybrid modes, electrical excitation, and anisotropic particles", Proc. SPIE 9550, Biosensing and Nanomedicine VIII, 95500T (21 August 2015); doi: 10.1117/12.2190102; https://doi.org/10.1117/12.2190102
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