Graphene oxide nano-platelets were produced from helical-ribbon carbon nanofibers by oxidation with KMnO 4 /H 2 SO 4 and further exfoliation by ultrasonication. The KMnO 4 to carbon nanofiber ratio is 1:1. TEM and AFM were used to characterize the samples. TEM shows individual nanocrystals with stra
Graphene nano-ribbon electronics
β Scribed by Zhihong Chen; Yu-Ming Lin; Michael J. Rooks; Phaedon Avouris
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 641 KB
- Volume
- 40
- Category
- Article
- ISSN
- 1386-9477
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β¦ Synopsis
We have fabricated graphene nano-ribbon field-effect transistor devices and investigated their electrical properties as a function of ribbon width. Our experiments show that the resistivity of a ribbon increases as its width decreases, indicating the impact of edge states. Analysis of temperature-dependent measurements suggests a finite quantum confinement gap opening in narrow ribbons. The electrical current noise of the graphene ribbon devices at low frequency is found to be dominated by the 1/f noise.
π SIMILAR VOLUMES
We simulate stationary current distribution in graphene ribbons in the presence of top gate potentials, by means of the nonequilibrium Keldysh-Green's function formalism within a tight-binding model. In the absence of magnetic fields and in the presence of a model potential barrier, we observe the K
We investigate the thermopower of ballistic graphene ribbons using linear response theory and the Landauer formalism. The dependence of thermopower on temperature and chemical potential is investigated and the obtained results are qualitatively in agreement with many features recently observed in th