Epitaxial Guidance of Adamantyl-Substituted Polythiophenes by Self-Assembled Monolayers

Epitaxial Guidance of Adamantyl-Substituted Polythiophenes by Self-Assembled Monolayers

Abstract

Charge-transport through organic materials is anisotropic in nature – control over its self-assembly therefore presents a viable pathway towards improved electronic properties. Self-assembled monolayers have been recently proven to be powerful-tools for this task as the first layer affects all of the subsequent deposition. This can completely change the materials topography and surface potential (i.e. its work-function). Herein, we study poly(3-adamantylmethylthiophene) (PMAT) at the dimer and dodecamer level. These short oligomers display an aromatic and an adamantyl-functionality, both of which can be used to guide subsequent self-assembly. The aromatic thiophene-subunits are expected to be the guiding moiety in the case of bare gold (Au(111)), while adamantyl-thiol treated gold directs towards a less disordered self-assembly pattern. Phenlythiol may, however result in a type of self-assembly in which the first layer deposited exposes an entirely adamantyl-based surface in turn, which leads to specific assembly-features.

Charge-transport through organic materials is anisotropic in nature – control over its self-assembly therefore presents a viable pathway towards improved electronic properties. Self-assembled monolayers have been recently proven to be powerful-tools for this task as the first layer affects all of the subsequent deposition. This can completely change the materials topography and surface potential (i.e. its work-function). Herein, we study poly(3-adamantylmethylthiophene) (PMAT) at the dimer and dodecamer level. These short oligomers display an aromatic and an adamantyl-functionality, both of which can be used to guide subsequent self-assembly. The aromatic thiophene-subunits are expected to be the guiding moiety in the case of bare gold (Au(111)), while adamantyl-thiol treated gold directs towards a less disordered self-assembly pattern. Phenlythiol may, however result in a type of self-assembly in which the first layer deposited exposes an entirely adamantyl-based surface in turn, which leads to specific assembly-features.

conducting polymers; surface science; self-assembly

conducting polymers; surface science; self-assembly

Farka, D.; Cigánek, M.; Veselý, D.; Krajčovič, J.

12.09.2024

Vysoké učení technické v Brně, Fakulta chemická

Brno, Česká republika

9th Meeting on CHEMISTRY & LIFE for Sustainable Future - Book of Abstracts

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https://www.fch.vut.cz/chl/konference/program/bookofabstracts-pdf-p269547