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Nanomechanics of graphene oxide-bacteriophage based self-assembled porous composites

Abstract: Graphene oxide, integrated with the filamentous bacteriophage M13, forms a 3D large-scale multifunctional porous structure by self-assembly, with considerable potential for applications. We performed Raman spectroscopy under pressure on this porous composite to understand its fundamental mechanics. The results show that at low applied pressure, the sp2 bonds of graphene oxide stiffen very little with increasing pressure, suggesting a complicated behaviour of water intercalated between the graphene layers. The key message of this paper is that water in a confined space can have a significant impact on the nanostructure that hosts it. We introduced carbon nanotubes during the self-assembly of graphene oxide and M13, and a similar porous macro-structure was observed. However, in the presence of carbon nanotubes, pressure is transmitted to the sp2 bonds of graphene oxide straightforwardly as in graphite. The electrical conductivity of the composite containing carbon nanotubes is improved by about 30 times at a bias voltage of 10 V. This observation suggests that the porous structure has potential in applications where good electrical conductivity is desired, such as sensors and batteries.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Scientific Reports (2020) 10:15618

Editorial: Nature Publishing Group

 Fecha de publicación: 24/09/2020

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1038/s41598-020-72372-1

ISSN: 2045-2322

Url de la publicación: https://doi.org/10.1038/s41598-020-72372-1

Autores/as

SUN, YIWEI

PASSARETTI, PAOLO

DUNSTAN, DAVID J.

OPPENHEIMER, POLA GOLDBERG

HUMPHREYS, COLIN J.