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Elucidating Quantum Confinement in Graphene Oxide Dots Based On Excitation-Wavelength-Independent Photoluminescence
Abstract
Investigating quantum confinement in graphene under ambient conditions remains a challenge. In this study, we present graphene oxide quantum dots (GOQDs) that show excitation-wavelength-independent photoluminescence. The luminescence color varies from orange-red to blue as the GOQD size is reduced from 8 to 1 nm. The photoluminescence of each GOQD specimen is associated with electron transitions from the antibonding π (π*) to oxygen nonbonding (n-state) orbitals. The observed quantum confinement is ascribed to a size change in the sp(2) domains, which leads to a change in the π*-π gap; the n-state levels remain unaffected by the size change. The electronic properties and mechanisms involved in quantum-confined photoluminescence can serve as the foundation for the application of oxygenated graphene in electronics, photonics, and biology.
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Cited by
Photonic Carbon Dots as an Emerging Nanoagent for Biomedical and Healthcare Applications
Chung, Y. J., Kim, J., & Park, C. B. (2020) · ACS Nano · doi:10.1021/acsnano.0c02114 · Cited by 299
Shamsipur, M., Barati, A., & Karami, S. (2017) · Carbon · doi:10.1016/j.carbon.2017.08.072 · Cited by 294
Cui, L., Ren, X., Wang, J., & Sun, M. (2020) · Materials Today Nano · doi:10.1016/j.mtnano.2020.100091 · Cited by 236
Metadata
- Authors
- Yeh, T.-F., Huang, W.-L., Chung, C.-J., Chiang, I.-T., Chen, L.-C., Chang, H.-Y., Su, W.-C., Cheng, C., Chen, S.-J., & Teng, H.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-05-23
- Volume
- 7
- Issue
- 11
- Pages
- 2087-2092
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2407485316
- Cited by
- 191
- References
- 0
- FWCI
- 8.88
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Elucidating Quantum Confinement in Graphene Oxide Dots Based On Excitation-Wavelength-Independent Photoluminescence. https://app.cochat.ai/papers/10.1021/acs.jpclett.6b00752
- The paper
- Yeh, T.-F., Huang, W.-L., Chung, C.-J., Chiang, I.-T., Chen, L.-C., Chang, H.-Y., Su, W.-C., Cheng, C., Chen, S.-J., & Teng, H. (2016). Elucidating Quantum Confinement in Graphene Oxide Dots Based On Excitation-Wavelength-Independent Photoluminescence. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/acs.jpclett.6b00752
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