Regensburg 2013 – scientific programme

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )

O 36.17: Poster

Tuesday, March 12, 2013, 18:15–21:45, Poster B2

Self-organized controlled positioning of nanoparticles in periodical arrays by horizontal dip coating — •Kathrin Kroth, Sabrina Darmawi, Limei Chen, and Peter J. Klar — I. Physikalisches Institut, Justus-Liebig-Universität, Heinrich-Buff-Ring 16, 35392 Gießen, Germany

With the help of a periodic array of cavities in the micrometer range, nanoparticles in colloidal particle suspension can be separated and arranged. The PMMA cavity structure is fabricated by EBL on a glass substrate. A drop of particle suspension, containing Au and polystyrene-latex particles (300nm), is deposited onto the array. Similar to standard dip coating, a second, motor-powered, plate slowly shoves the suspension above the structured surface. During this process the nanoparticles are arranged inside the cavities by the meniscus force. A characterization of the particles inside the cavities was carried out by SEM and Raman measurements. The Raman results will be discussed with respect to surface-enhancement effects of the signals.