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Strong Band-Edge Emission from ZnS Quantum Dots Stabilized by Gum Arabic |
| Hatim Mohamed El-Khair Dirar |
| Department of Physics, Faculty of Science and Technology, Al-Neelain University, PO Pox 12702, Khartoum 11121, Sudan |
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| Cite this article: |
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Hatim Mohamed El-Khair Dirar 2008 Chin. Phys. Lett. 25 4480-4481 |
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Abstract ZnS quantum dots (QDs), prepared by soft-condensation, exhibit robust structure of a quantum size equal 3.13 nm mediated two-dimensional gum Arabic surfactant as characterized by scan tunnelling microscope (STM). Strong blue-shifted absorption and emission bands are depicted by optical characterization even for the sample stored under ambient condition for two weeks. These enhancements can be attributed to the completely passivated surface trap states by Gum Arabic.
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| Keywords:
86.65.+g
78.55.Et
81.65.Rv
82.45.+z
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Received: 16 July 2008
Published: 27 November 2008
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