60 seconds on…conductive graphene inks
What are they?
Printable inks with high concentrations of graphene flakes, of up to 100g per litre.
Who created them?
Researchers in the Graphene Flagship, led by researchers from the Cambridge Graphene Centre, University of Cambridge, UK.
How are they made?
In a microfluidisation process, graphene flakes are broken off graphite using ultra-high shear forces. 100% of the starting graphite material is converted into useable graphene flakes. Carboxymethylcellulose sodium salt is used to stabilise the material, without a need for centrifugation.
Why are they needed?
Lead author of the paper, Dr Panagiotis Karagiannidis, commented, ‘The motivation was the need for layers with low sheet resistance to be produced by screen printing using inks with high concentration. There is no wastage of material or time consuming post-processing.’
What can they be used for?
Applications include large-scale screen-printing, flexible electronics, such as transistors and photovoltaic cells, and potential future uses in food packaging. They could also be used to create coatings.
To read the full research paper, Microfluidization of Graphite and Formulation of Graphene-Based Conductive Inks, visit, bit.ly/2mEPUVJ