Graphene substrate improves the conductivity of carbon nanotube network

phys.org | 9/23/2019 | Staff
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Transparent conductive films (TCFs) have many applications in touch screens, organic light emitting diodes and solar cells. These applications need materials that are strong, energy efficient and stable, which is why companies and researchers are interested in carbon-based materials. This applies especially to networks of single-walled carbon nanotubes, which are expected to replace the metal-oxide films that are currently used.

Graphene is the thinnest imaginable material; it is just one atomic layer of carbon atoms. Rolling this into a cylinder makes a carbon nanotube, which is better suited to carrying electricity in real-world applications. In an article published in ACS Nano, scientists at Aalto University and the University of Vienna introduce a hybrid material made by combining carbon nanotubes and graphene, which improves the conductivity of the film beyond what is possible when using each of these component structures separately.

Professor - Kauppinen - Group - Aalto - Years

Professor Kauppinen's group at Aalto has years of experience in making carbon nanotubes for TCFs. This new work applies the techniques they have developed to place densely-packed and clean random nanotube networks on graphene. "This is another application of the technologies we have developed over the past decades. Put simply, this work is about how the two materials are put together without solvents," Kauppinen explains.

In the study, the scientists used a process called thermophoresis to deposit nanotubes...
(Excerpt) Read more at: phys.org
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