Kumar K. – TechConnect Briefs

The Effect of Thermal Annealing Processes on Graphene

Kumar K., Kim Y-S, Li X., Tian Y., Pallikaras A., Yang E.H., Stevens Institute of Technology, US

We demonstrate the impact of PMMA removal from CVD graphene by annealing in H2/Ar and ambient atmospheres as well as under vacuum on the Raman spectra and AFM topography of graphene. We find a broad [...]

Fabrication and Characterization of 3-D Graphene-CNT Architectures Towards Supercapacitor Applications

Kim Y-S, Kumar K., Li X., Fisher F.T., Yang E.H., Stevens Institute of Technology, US

This work describes the first steps towards fabrication and characterization of a novel hybrid nanostructure comprised of carbon nanotubes (CNTs) grown out-of-plane from graphene layers for supercapacitor applications. Graphene is a promising material for supercapacitors, [...]

Nanoscale Graphene Lithography Using an Atomic Force Microscope

Kumar K., Yang E.H., Stevens Institute of Technology, US

In this work, we study Atomic Force Microscope local oxidation lithography to precisely fabricate nanometer-scale structures from graphene, a recently discovered material with exceptional electrical properties. We have systematically studied oxidation parameters (electric field, humidity, [...]