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Uniform Graphene Quantum Dots Patterned from Self-Assembled Silica Nanodots
Abstract
Graphene dots precisely controlled in size are interesting in nanoelectronics due to their quantum optical and electrical properties. However, most graphene quantum dot (GQD) research so far has been performed based on flake-type graphene reduced from graphene oxides. Consequently, it is extremely difficult to isolate the size effect of GQDs from the measured optical properties. Here, we report the size-controlled fabrication of uniform GQDs using self-assembled block copolymer (BCP) as an etch mask on graphene films grown by chemical vapor deposition (CVD). Electron microscope images show that as-prepared GQDs are composed of mono- or bilayer graphene with diameters of 10 and 20 nm, corresponding to the size of BCP nanospheres. In the measured photoluminescence (PL) spectra, the emission peak of the GQDs on the SiO(2) substrate is shown to be at ∼395 nm. The fabrication of GQDs was supported by the analysis of the Raman spectra and the observation of PL spectra after each fabrication step. Additionally, oxygen content in the GQDs is rationally controlled by additional air plasma treatment, which reveals the effect of oxygen content to the PL property.
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Citations
Cited by
Zhu, S., Song, Y., Zhao, X., Shao, J., Zhang, J., & Yang, B. (2015) · Nano Research · doi:10.1007/s12274-014-0644-3 · Cited by 2,781
Georgakilas, V., Perman, J. A., Tucek, J., & Zboril, R. (2015) · Chemical Reviews · doi:10.1021/cr500304f · Cited by 2,147
Evolution and Synthesis of Carbon Dots: From Carbon Dots to Carbonized Polymer Dots
Xia, C., Zhu, S., Feng, T., Yang, M., & Yang, B. (2019) · Advanced Science · doi:10.1002/advs.201901316 · Cited by 1,508
Shining carbon dots: Synthesis and biomedical and optoelectronic applications
Yuan, F., Li, S., Fan, Z., Meng, X., Fan, L., & Yang, S. (2016) · Nano Today · doi:10.1016/j.nantod.2016.08.006 · Cited by 746
Zhu, S., Song, Y., Wang, J., Wan, H., Zhang, Y., Ning, Y., & Yang, B. (2017) · Nano Today · doi:10.1016/j.nantod.2016.12.006 · Cited by 567
Metadata
- Authors
- Lee, J., Kim, K., Park, W. I., Kim, B.-H., Park, J. H., Kim, T.-H., Bong, S., Kim, C.-H., Chae, G., Jun, M., Hwang, Y., Jung, Y. S., & Jeon, S.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-11-26
- Volume
- 12
- Issue
- 12
- Pages
- 6078-6083
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2011289710
- Cited by
- 209
- References
- 0
- FWCI
- 7.10
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lee, J., Kim, K., Park, W. I., Kim, B.-H., Park, J. H., Kim, T.-H., Bong, S., Kim, C.-H., Chae, G., Jun, M., Hwang, Y., Jung, Y. S., & Jeon, S. (2012). Uniform Graphene Quantum Dots Patterned from Self-Assembled Silica Nanodots. Nano Letters. https://doi.org/10.1021/nl302520m
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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