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Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 39: Poster Tuesday: 2D Materials

O 39.4: Poster

Dienstag, 2. April 2019, 18:00–20:00, Poster D

Chemical stability of graphene nanoribbons exposed to ambient conditions — •Mohammed S. G. Mohammed1,2, James Lawrence1,2, Alejandro Berdonces Layunta1,2, Luciano Colazzo1,2, Diego Peña3, and Dimas G. de Oteyza1,2,41Donostia International Physics Center (DIPC), San Sebastian, Spain — 2Materials Physics Center, Centro de Física de Materiales (CSIC/UPV-EHU), San Sebastian, Spain — 3Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela, Spain — 4Ikerbasque, Basque Foundation for Science, Bilbao, Spain

Graphene nanoribbons (GNRs) are extremely promising materials for optoelectronic applications. Key for the potential use of these functional materials synthesized under ultra-high vacuum is their stability to the environments faced during the device implementation, as well as during the ultimate device operation. In this work, starting from atomically precise chiral GNRs with well-defined semiconducting properties, we study the effect of their exposure to atmospheric conditions. STM high-resolution images and spectroscopic analysis show the severe degradation of both the bonding structure and the associated electronic properties of the ribbons. Through control experiments exposing the GNRs, still under vacuum, to low partial pressures of pure oxygen, we reveal its key role in the GNRs degradation.

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