title: Simultaneous electrical and plasmonic monitoring of potential induced ion adsorption on metal nanowire arrays.
abstract: Simultaneous LSPR and electronic sensing of potential induced ion adsorption onto gold nanowire arrays is presented. The formation of a Stern layer upon applying an electrochemical potential generated a complex optical response. Simulation of a lossy atomic layer on the nanowire array using the Multiple Multipole Program (MMP) corresponded very well to the experimentally observed peak position, intensity, and radius of curvature changes. Additionally, a significant voltage-dependent change in the resistance of the gold nanowire array was observed during the controlled formation of the electrical double layer. The results demonstrated that an applied electrochemical potential induces measurable changes in the optical and electrical properties of the gold nanowire surface. This is the first demonstration of combined plasmonic and nanowire resistance-based sensing of a surface process in the literature.
authors: ETH Zurich, Institute for Biomedical Engineering, Zurich, Switzerland.
authors: Robert
authors: R
authors: MacKenzie
authors: Corrado
authors: C
authors: Fraschina
authors: Bernd
authors: B
authors: Dielacher
authors: Takumi
authors: T
authors: Sannomiya
authors: Andreas B
authors: AB
authors: Dahlin
authors: Janos
authors: J
authors: Vörös
mesh_terms: D000327:Adsorption; D006046:Gold / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D053770:Nanowires / Q000737:chemistry*; D020349:Surface Plasmon Resonance
chemical_list: D007477:Ions; D006046:Gold