Dresden 2014 – scientific programme
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O: Fachverband Oberflächenphysik
O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures
O 37.12: Poster
Tuesday, April 1, 2014, 18:30–22:00, P2
Optical Properties of Self-assembled Metal Nanoparticle Arrays — •Mario Fey1, Jan Kuhnert2, Sangam Chatterjee2, and Peter J. Klar1 — 1Justus-Liebig-Universität Giessen, Germany — 2Philipps-Universität Marburg, Germany
The investigation of the optical properties of metal nanoparticles has long been of interest in physics. Since these particles have particular properties as their size approaches the nanoscale, like tunable surface plasmon resonances, they can be employed in different research fields e.g. surface-enhanced Raman spectroscopy. To gain more insight into surface plasmons, self-assembled gold and silver nanoparticle arrays as well as single arrangements consisting of a few nanoparticles were investigated by optical transmission spectroscopy. The samples were fabricated by electron beam lithography and a horizontal dip-coating process. The former step enabled us to define cavities of different sizes and shapes in the PMMA resist deposited on glass substrates. Size and shape of the cavities allow one to control the number and arrangement of the nanoparticles assembled by the horizontal dip-coating process in the cavities. Thus different arrays or rather formations of metal nanoparticles (single particles, pairs of particles etc.) on glass were obtained. Optical transmission spectroscopy allowed us to investigate the surface plasmon resonances of arrays of metal nanoparticles depending on the formation of the metal particles.