Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 57: Plasmonics and Nanooptics II

O 57.11: Talk

Wednesday, April 2, 2014, 18:30–18:45, GER 38

the applications of Au nanostructure arrays to sensors — •Zhijie Wang, Dawei Cao, Liaoyong Wen, Yan Mi, Ranjith Vellacheri, and Yong Lei — Ilmenau University of Technology, Institute of Physics & IMN MacroNano* (ZIK) Prof. Schmidt-Str. 26, 98693 Ilmenau

Noble nano-materials, particularly Au nanoparticles and nanowires, show an outstanding localized surface plasmon property associated with the enhanced surface electromagnetic field due to its localization in nano-scale. The surface plasmon resonance peaks and intensities of the Au nano-materials are tunable through the manipulation of the shape, the size and the surface modifications of the Au nanoparticles. In contrast to the conventional sensor applications of Au nanoparticles, just by dispersing them in the analyte solution to collect optical signal, herein, we fabricated Au nanowires and particles arrays on substrates. Through surface modifications by cysteine, the surface plasmon peaks of these Au nanostructures shifted obviously according to the different analytes. Possibility to design Au nano-sensors for collecting electronic signal from the reaction between the surface plasmons and analytes will be discussed.