Plasma-Electric Field Controlled Growth of Oriented Graphene for Energy Storage Applications
arXiv:2206.01996 · doi:10.1088/1361-6463/aab130
Abstract
Graphene is well known to grow as flat sheets aligned with the growth substrate. Oriented graphene structures typically normal to the substrate have recently gained major attention. Most often, normal orientation is achieved in plasma-assisted growth and is believed to be due to plasma induced in-built electric field, which is usually oriented normal to the substrate. This work focuses on the effect of in-built electric field on growth direction, morphology, interconnectedness, and physical properties of various configurations of graphene structures and reveals the unique dependence of these features on electric field orientation. It is shown that tilting of growth substrates from parallel to normal direction with respect to the direction of inbuilt plasma electric field leads to the morphological transitions from flat graphene structure, to oriented individual graphene sheets and then interconnected three-dimensional networks of oriented graphene sheets. The revealed transition of the growth orientation leads to change in wetting nature, types of defect in graphitic structures as well as affects their charge storage capacity when used as supercapacitor electrodes. This simple and versatile approach opens new opportunities for the production of potentially large batches of differently oriented and structured graphene sheets in one production run.
12 pages, 4 Figures
References in corpus (12)
- Probing the Nature of Defects in Graphene by Raman Spectroscopy
- Defect-engineered graphene for bulk supercapacitors with high energy and power densities
- A comparative study on defect estimation using XPS and Raman spectroscopy in few layer nanographitic structures
- Evolution and defect analysis of vertical graphene nanosheets
- Chemical vapor deposited graphene: From synthesis to applications
- Influence of aqueous electrolytes on electrochemical performance of vertical graphene nanosheets supercapacitor electrode
- A route towards controlling the morphology of vertical graphene nanosheets
- Transfer of Vertical Graphene Nanosheets onto Flexible Substrates towards Supercapacitor Application
- Aging Effects on Vertical Graphene Nanosheets and their Thermal Stability
- Flipping growth orientation of nanographitic structures by plasma enhanced chemical vapor deposition
- Influence of nitrogen on the growth of vertical graphene nanosheets under plasma
- Spectroscopically forbidden infra-red emission in Au-vertical graphene hybrid nanostructures