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Tuning graphene morphology by substrate towards wrinkle-free devices: Experiment and simulation
- Source :
- Journal of Applied Physics. 113:104301
- Publication Year :
- 2013
- Publisher :
- AIP Publishing, 2013.
-
Abstract
- Graphene grown by chemical vapor deposition can be used as the conductive channel in metal oxide semiconductor field effect transistors, metallic electrodes in capacitors, etc. However, substrate-induced corrugations and strain-related wrinkles formed on the graphene layer impoverish the properties of these devices by lowering the conductance and increasing their variability. Using the scanning electron microscopy, Auger electron spectroscopy, scanning tunneling microscopy, and atomic force microscopy, we investigated the morphology of as-grown and transferred graphene sheets on different substrates. We show that while the compressive strain (from the growth process) in the graphene sheet on flat substrates is minimized by generating wrinkles, and on rough substrates, it can be minimized by improving the graphene-substrate adhesion, leading to lower densities of wrinkles. This method paves the way to the design of wrinkle-free graphene based devices.
- Subjects :
- Auger electron spectroscopy
Materials science
Graphene
business.industry
Scanning electron microscope
General Physics and Astronomy
Nanotechnology
Substrate (electronics)
Chemical vapor deposition
law.invention
law
Optoelectronics
Scanning tunneling microscope
business
Graphene nanoribbons
Graphene oxide paper
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 113
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........c1f957e0456549a6778c79991a76460e