Hyperfine Coupling in Colloidal n-Type ZnO Quantum Dots: Effects on Electron Spin Relaxation

被引：27

作者：

Whitaker, Kelly M. ^{[1
]}

Ochsenbein, Stefan T. ^{[1
]}

Smith, Alyssa L. ^{[1
]}

Echodu, Dorothy C. ^{[1
]}

Robinson, Bruce H. ^{[1
]}

Gamelin, Daniel R. ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 34期

关键词：

OPTICAL-PROPERTIES; EPR-SPECTRA; NANOCRYSTALS; RESONANCE; MAGNETISM; ENERGY;

D O I：

10.1021/jp106356y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 Zn-67 (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 Zn-67.

引用

页码：14467 / 14472

页数：6

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