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Rapid synthesis of stable ZnO quantum dots
Abstract
Zinc oxide nanocrystallites down to 1.5 nm in diameter were made by spray combustion of Zn/Si precursors. These crystallites exhibit a quantum size effect: blueshift of light absorption with decreasing crystallite size. X-ray diffraction, high-resolution transmission electron microscopy, and nitrogen adsorption showed that the addition of controlled amounts of silica prevented the growth and stabilized the ZnO crystals. The blue shift of the ultraviolet-vis absorption edge with decreasing ZnO crystal size closely followed a correlation between optical band gap and crystallite size from the literature. The band-gap energy of these ZnO quantum dots increased with silica content in the spray and particles consistently. The as-prepared quantum dots were stable and did not require any post processing.
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Cited by
Brunner, T. J., Wick, P., Manser, P., Spohn, P., Grass, R. N., Limbach, L. K., Bruinink, A., & Stark, W. J. (2006) · Environmental Science & Technology · doi:10.1021/es052069i · Cited by 1,385
Self-citationZnO: Material, Physics and Applications
Klingshirn, C. (2007) · ChemPhysChem · doi:10.1002/cphc.200700002 · Cited by 953
Flame spray pyrolysis: An enabling technology for nanoparticles design and fabrication
Teoh, W. Y., Amal, R., & Mädler, L. (2010) · Nanoscale · doi:10.1039/c0nr00017e · Cited by 731
Self-citationFlame aerosol synthesis of smart nanostructured materials
Strobel, R., & Pratsinis, S. E. (2007) · Journal of Materials Chemistry · doi:10.1039/b711652g · Cited by 594
Self-citationGeorge, S., Pokhrel, S., Xia, T., Gilbert, B., Ji, Z., Schowalter, M., Rosenauer, A., Damoiseaux, R., Bradley, K. A., Mädler, L., et al. (2010) · ACS Nano · doi:10.1021/nn901503q · Cited by 543
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Metadata
- Authors
- Mädler, L., Stark, W. J., & Pratsinis, S. E.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 2002-12-01
- Volume
- 92
- Issue
- 11
- Pages
- 6537-6540
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2013286736
- Cited by
- 164
- References
- 0
- FWCI
- 5.15
- Type
- journal article
- Language
- en
- Open access
- closed
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