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MM: Fachverband Metall- und Materialphysik
MM 22: Interface Controlled Properties, Nanomaterials and Microstructure Design III
MM 22.3: Vortrag
Dienstag, 19. März 2024, 10:45–11:00, C 230
Influence of Trench Geometry on the Directed Capillary Self-Assembly of Anisotropic Gold Nanoparticles — •Stefan M. Schupp1, Felizitas Kirner2, Helmut Cölfen2, and Lukas Schmidt-Mende1 — 1Department of Physics, University of Konstanz, Germany — 2Department of Chemistry, University of Konstanz, Germany
The self-assembly of anisotropic metal nanoparticles (NPs) into ordered nanostructures is a promising bottom-up approach for applications in photonics and nanoelectronics due to the unique directional properties of the resulting structures. However, the deterministic placement and orientation of these NPs remains a challenge to this day. In this study, we apply a combination of capillary forces and lithographically patterned substrates to assemble gold nanocubes (AuNCs) with an edge length of 60 nm into linear structures. Here, the influence of trench geometry on the assembly outcome is investigated in detail, which allows to generate ordered mono- to bilayer AuNC structures with varying widths. Finally, this directed capillary self-assembly approach is used to assemble AuNC lines onto pre-fabricated electrodes to perform electrical measurements. Thus, this method can be applied to integrate anisotropic NPs into future electronic devices.
Keywords: Capillary Assembly; Anisotropic Nanoparticle; Gold; Lithography; Electronic Properties