Evidence for formation of multi-quantum dots in hydrogenated graphene
Puddy, Reuben K
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Chuang, C., Puddy, R. K., Connolly, M., Lo, S., Lin, H., Chen, T., Smith, C., & et al. (2012). Evidence for formation of multi-quantum dots in hydrogenated graphene. https://doi.org/10.1186/1556-276X-7-459
Abstract We report the experimental evidence for the formation of multi-quantum dots in a hydrogenated single-layer graphene flake. The existence of multi-quantum dots is supported by the low-temperature measurements on a field effect transistor structure device. The resulting Coulomb blockade diamonds shown in the color scale plot together with the number of Coulomb peaks exhibit the characteristics of the so-called ‘stochastic Coulomb blockade’. A possible explanation for the formation of the multi-quantum dots, which is not observed in pristine graphene to date, was attributed to the impurities and defects unintentionally decorated on a single-layer graphene flake which was not treated with the thermal annealing process. Graphene multi-quantum dots developed around impurities and defect sites during the hydrogen plasma exposure process.
External DOI: https://doi.org/10.1186/1556-276X-7-459
This record's URL: http://www.dspace.cam.ac.uk/handle/1810/244083
Rights Holder: Chiashain Chuang et al.; licensee BioMed Central Ltd.