Hyperfine Coupling in Colloidal n-Type ZnO Quantum Dots: Effects on Electron Spin Relaxation
Electron spin relaxation dynamics in colloidal ZnO quantum dots containing additional delocalized conduction band electrons (n-type) have been studied using electron paramagnetic resonance (EPR) spectroscopy. Variation of the 67Zn (I = 5/2) nuclear isotope content within the quantum dots allows the...
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| Veröffentlicht in: | Journal of physical chemistry. C 2010-09, Vol.114 (34), p.14467-14472 |
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| container_end_page | 14472 |
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| container_issue | 34 |
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| container_title | Journal of physical chemistry. C |
| container_volume | 114 |
| creator | Whitaker, Kelly M Ochsenbein, Stefan T Smith, Alyssa L Echodu, Dorothy C Robinson, Bruce H Gamelin, Daniel R |
| description | Electron spin relaxation dynamics in colloidal ZnO quantum dots containing additional delocalized conduction band electrons (n-type) have been studied using electron paramagnetic resonance (EPR) spectroscopy. Variation of the 67Zn (I = 5/2) nuclear isotope content within the quantum dots allows the effects of the electron−nuclear hyperfine interaction on spin−spin and spin−lattice relaxation dynamics to be explored. Long room-temperature spin−spin relaxation times of T 2 = 87 ns are observed in ZnO quantum dots almost completely depleted of 67Zn. |
| doi_str_mv | 10.1021/jp106356y |
| format | Article |
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C</title><addtitle>J. Phys. Chem. C</addtitle><description>Electron spin relaxation dynamics in colloidal ZnO quantum dots containing additional delocalized conduction band electrons (n-type) have been studied using electron paramagnetic resonance (EPR) spectroscopy. Variation of the 67Zn (I = 5/2) nuclear isotope content within the quantum dots allows the effects of the electron−nuclear hyperfine interaction on spin−spin and spin−lattice relaxation dynamics to be explored. 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Variation of the 67Zn (I = 5/2) nuclear isotope content within the quantum dots allows the effects of the electron−nuclear hyperfine interaction on spin−spin and spin−lattice relaxation dynamics to be explored. Long room-temperature spin−spin relaxation times of T 2 = 87 ns are observed in ZnO quantum dots almost completely depleted of 67Zn.</abstract><pub>American Chemical Society</pub><doi>10.1021/jp106356y</doi><tpages>6</tpages></addata></record> |
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| ispartof | Journal of physical chemistry. C, 2010-09, Vol.114 (34), p.14467-14472 |
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| language | eng |
| recordid | cdi_crossref_primary_10_1021_jp106356y |
| source | American Chemical Society Journals |
| subjects | C: Nanops and Nanostructures |
| title | Hyperfine Coupling in Colloidal n-Type ZnO Quantum Dots: Effects on Electron Spin Relaxation |
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