High-field electron paramagnetic resonance as a microscopic probe of anisotropic strain at Mn2+ sites in CdSe:Mn2+ quantum dots

2012 ◽  
Vol 524 ◽  
pp. 73-77 ◽  
Author(s):  
Zhenxing Wang ◽  
Weiwei Zheng ◽  
Johan van Tol ◽  
Naresh S. Dalal ◽  
Geoffrey F. Strouse
Keyword(s):  
Quantum Dots ◽  
Electron Paramagnetic Resonance ◽  
High Field ◽  
Paramagnetic Resonance ◽  
Anisotropic Strain ◽  
Field Electron ◽  
Microscopic Probe ◽  
Electron Paramagnetic

SPACE-CHARGE LAYER, INTRINSIC "BULK" AND SURFACE COMPLEX DEFECTS IN ZnO NANOPARTICLES — A HIGH-FIELD ELECTRON PARAMAGNETIC RESONANCE ANALYSIS

2013 ◽  
Vol 06 (04) ◽  
pp. 1330004 ◽  
Author(s):  
RÜDIGER-A. EICHEL ◽  
EMRE ERDEM ◽  
PETER JAKES ◽  
ANDREW OZAROWSKI ◽  
JOHAN VAN TOL ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Space Charge ◽  
Zno Nanoparticles ◽  
High Field ◽  
Space Charge Layer ◽  
Paramagnetic Resonance ◽  
Charge Layer ◽  
Type Formula ◽  
Field Electron ◽  
Electron Paramagnetic

The defect structure of ZnO nanoparticles is characterized by means of high-field electron paramagnetic resonance (EPR) spectroscopy. Different point and complex defects could be identified, located at the "bulk" or the surface region of the nanoparticles. In particular, by exploiting the enhanced g-value resolution at a Larmor frequency of 406.4 GHz, it could be shown that the resonance commonly observed at g = 1.96 is comprised of several overlapping resonances from different defects. Based on the high-field EPR analysis, the development of a space-charge layer could be monitored that consists of (shallow) donor-type [Formula: see text] defects at the "bulk" and acceptor-type [Formula: see text] and complex [Formula: see text] defects at the surface. Application of a core-shell model allows to determine the thickness of the depletion layer to 1.0 nm for the here studied compounds [J.J. Schneider et al., Chem. Mater.22, 2203 (2010)].

A Multifrequency High-Field Electron Paramagnetic Resonance Study of CoIIS4Coordination

2010 ◽  
Vol 49 (2) ◽  
pp. 595-605 ◽  
Author(s):  
Dimitrios Maganas ◽  
Sergey Milikisyants ◽  
Jorrit M. A. Rijnbeek ◽  
Silvia Sottini ◽  
Nikolaos Levesanos ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
High Field ◽  
Electron Paramagnetic Resonance Study ◽  
Paramagnetic Resonance ◽  
Field Electron ◽  
Electron Paramagnetic
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