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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 52: Focus: Two Dimensional Functional Materials I

CPP 52.3: Vortrag

Donnerstag, 10. März 2016, 10:30–10:45, H51

Functional Carbon Nanosheets From Amphiphilic Hexayne Precursors At Interfaces — •Bjoern Schulte, Stephen Schrettl, and Holger Frauenrath — École Polytechnique Fédérale de Lausanne, Institute of Materials, Laboratory of Macromolecular and Organic Materials, Station 12, 1015 Lausanne, Switzerland

The access to functional two-dimensional carbon nanomaterials remains challenging despite intensive research. Established synthetic routes follow either top-down or bottom-up strategies. Top-down approaches yield materials with a high degree of structural perfection but are mostly limited to small-scale production. Bottom-up approaches promise to be better scalable, but often preclude chemical functionalization of carbon nanomaterials due to the high temperatures required for the carbonization of the precursors. Recently, our group reported on a new approach to obtain two-dimensional carbon nanomaterials from hexayne amphiphiles as molecular precursors. The amphiphilic precursors contain a segment of sp-hybridized carbons that is highly reactive and undergoes carbonization upon irradiation with UV light at room temperature. These mild conditions allow to transfer the chemical functionality of the precursor to the carbon nanomaterial. Based upon the formation of a dense self-assembled monolayer of hexayne precursors at the air-water-interface amphiphilic carbon nanosheets with a thickness of less than 2 nm and lateral dimensions of square centimeters are obtained. Further extending our work, we will provide a more detailed study of the properties of hexayne amphiphiles at interfaces.