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Standardization of surface potential measurements of graphene domains
Open accessAbstract
We compare the three most commonly used scanning probe techniques to obtain a reliable value of the work function in graphene domains of different thickness. The surface potential (SP) of graphene is directly measured in Hall bar geometry via a combination of electrical functional microscopy and spectroscopy techniques, which enables calibrated work function measurements of graphene domains in ambient conditions with values Φ1LG ~4.55 ± 0.02 eV and Φ2LG ~ 4.44 ± 0.02 eV for single- and bi-layer, respectively. We demonstrate that frequency-modulated Kelvin probe force microscopy (FM-KPFM) provides more accurate measurement of the SP than amplitude-modulated (AM)-KPFM. The discrepancy between experimental results obtained by different techniques is discussed. In addition, we use FM-KPFM for contactless measurements of the specific components of the device resistance. We show a strong non-Ohmic behavior of the electrode-graphene contact resistance and extract the graphene channel resistivity.
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Cited by
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Fan, F. R., Tang, W., & Wang, Z. L. (2016) · Advanced Materials · doi:10.1002/adma.201504299 · Cited by 1,918
Recent Progress on Piezoelectric and Triboelectric Energy Harvesters in Biomedical Systems
Zheng, Q., Shi, B., Li, Z., & Wang, Z. L. (2017) · Advanced Science · doi:10.1002/advs.201700029 · Cited by 566
Transparent Flexible Graphene Triboelectric Nanogenerators
Kim, S., Gupta, M. K., Lee, K. Y., Sohn, A., Kim, T. Y., Shin, K., Kim, D., Kim, S. K., Lee, K. H., Shin, H., et al. (2014) · Advanced Materials · doi:10.1002/adma.201400172 · Cited by 467
Metadata
- Authors
- Panchal, V., Pearce, R., Yakimova, R., Tzalenchuk, A., & Kazakova, O.
- Venue
- Scientific Reports
- Published
- 2013-09-06
- Volume
- 3
- Issue
- 1
- Pages
- 2597-2597
- ISSN
- 2045-2322 (ISSN-L)
- OpenAlex
- W2145834542
- Cited by
- 239
- References
- 0
- FWCI
- 8.73
- Type
- journal article
- Language
- en
- Open access
- gold
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- Panchal, V., Pearce, R., Yakimova, R., Tzalenchuk, A., & Kazakova, O. (2013). Standardization of surface potential measurements of graphene domains. Scientific Reports. https://doi.org/10.1038/srep02597
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