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O: Fachverband Oberflächenphysik

O 13: Nanostructures at Surfaces 2

O 13.6: Talk

Monday, September 5, 2022, 16:15–16:30, S052

Gold nanostructures with varying physicochemical surrounding examined with surface second harmonic generation circular dichroism spectroscopy — •Natalie Fehn¹, Ehsan Vahidzadeh², Karthik Shankar², Ueli Heiz¹, and Aras Kartouzian¹ — ¹Physical Chemistry, Department of Chemistry and Catalysis Research Center, Technical University of Munich — ²Electrical and Computer Engineering Deptartment, Faculty of Engineering, University of Alberta

The sophisticated second-order spectroscopic methods of surface second harmonic generation (s-SHG) and s-SHG circular dichroism spectroscopies (s-SHG-CD) provide additional and complementary structural information in regards to their linear counterparts, absorbance and CD spectroscopy. Because of their surface sensitivity, s-SHG and s-SHG-CD represent an excellent choice for the investigation of molecular thin films and supported plasmonic structures, such as nanoparticles and clusters. We are especially interested in the interaction of such nanostructures with their surroundings, e.g. chiral molecule adsorbates or oxide layers, with the goal of observing a chiral response from the originally achiral particles. Those particles may then serve as catalysts in asymmetric heterogeneous catalysis. This contribution will focus on our research with emphasis on supported gold nanostructures.