APA
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Adnan, R. H., Woon, K. L., Chanlek, N., Nakajima, H., & Majid, W. (2017). Ligand-Stabilized ZnO Quantum Dots: Molecular Dynamics and Experimental Study. Australian Journal of Chemistry, 70, 1110. https://doi.org/10.1071/CH17078
Chicago/Turabian
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Adnan, R. H., K. L. Woon, N. Chanlek, H. Nakajima, and W. Majid. “Ligand-Stabilized ZnO Quantum Dots: Molecular Dynamics and Experimental Study.” Australian Journal of Chemistry 70 (2017): 1110.
MLA
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Adnan, R. H., et al. “Ligand-Stabilized ZnO Quantum Dots: Molecular Dynamics and Experimental Study.” Australian Journal of Chemistry, vol. 70, 2017, p. 1110, doi:10.1071/CH17078.
BibTeX Click to copy
@article{r2017a,
title = {Ligand-Stabilized ZnO Quantum Dots: Molecular Dynamics and Experimental Study},
year = {2017},
journal = {Australian Journal of Chemistry},
pages = {1110},
volume = {70},
doi = {10.1071/CH17078},
author = {Adnan, R. H. and Woon, K. L. and Chanlek, N. and Nakajima, H. and Majid, W.}
}
Different aminoalcohol ligands, monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) were employed to passivate the surface of ZnO quantum dots (ZnO QDs). High-resolution transmission electron microscopy (HRTEM) imaging revealed that the higher branched aminoalcohols produced smaller sized ZnO QDs. The average size for ZnO/MEA, ZnO/DEA, and ZnO/TEA were found to be 3.2, 2.9, and 2.4 nm. TEA ligands were effective in producing stable, monodisperse ZnO QDs compared with DEA and MEA ligands. Molecular dynamics and semi-empirical calculations suggested that TEA and DEA ligands interact strongly with the partial charge of ZnO dangling bonds and have a large molar volume to hinder the diffusion of precursors through the ligands to the surface of ZnO resulting in a smaller particle size as compared with MEA ligands. As the size of ZnO QDs decreases from ZnO/MEA to ZnO/TEA, the absorption edge and emission peak maximum blue-shifts to a shorter wavelength due to the quantum size effect. The bandgap of ZnO/MEA, ZnO/DEA, and ZnO/TEA was determined to be 3.97, 4.07, and 4.23 eV, and the emission peak was found to be 472, 464, and 458 nm when excited using a 325 nm excitation wavelength, respectively.
