| PISKORSKA-HOMMEL, E., Václav HOLÝ, Ondřej CAHA, A. WOLSKA, A. GUST, C. KRUSE, H. KROENCKE, J. FALTA a D. HOMMEL. Complementary information on CdSe/ZnSe quantum dot local structure from extended X-ray absorption fine structure and diffraction anomalous fine structure measurements. Journal of Alloys and Compounds. LAUSANNE: Elsevier, 2012, roč. 523, May, s. 155-160. ISSN 0925-8388. Dostupné z: https://dx.doi.org/10.1016/j.jallcom.2012.01.133. |
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@article{1094763,
author = {PiskorskaandHommel, E. and Holý, Václav and Caha, Ondřej and Wolska, A. and Gust, A. and Kruse, C. and Kroencke, H. and Falta, J. and Hommel, D.},
article_location = {LAUSANNE},
article_number = {May},
doi = {http://dx.doi.org/10.1016/j.jallcom.2012.01.133},
keywords = {CdSe; quantum dots; EXAFS; DAFS},
language = {eng},
issn = {0925-8388},
journal = {Journal of Alloys and Compounds},
title = {Complementary information on CdSe/ZnSe quantum dot local structure from extended X-ray absorption fine structure and diffraction anomalous fine structure measurements},
url = {http://www.sciencedirect.com/science/article/pii/S0925838812002198},
volume = {523},
year = {2012}
}
TY - JOUR
ID - 1094763
AU - Piskorska-Hommel, E. - Holý, Václav - Caha, Ondřej - Wolska, A. - Gust, A. - Kruse, C. - Kroencke, H. - Falta, J. - Hommel, D.
PY - 2012
TI - Complementary information on CdSe/ZnSe quantum dot local structure from extended X-ray absorption fine structure and diffraction anomalous fine structure measurements
JF - Journal of Alloys and Compounds
VL - 523
IS - May
SP - 155-160
EP - 155-160
PB - Elsevier
SN - 09258388
KW - CdSe
KW - quantum dots
KW - EXAFS
KW - DAFS
UR - http://www.sciencedirect.com/science/article/pii/S0925838812002198
L2 - http://www.sciencedirect.com/science/article/pii/S0925838812002198
N2 - The extended X-ray absorption fine structure (EXAFS) and diffraction anomalous fine structure (DAFS) have been applied to investigate a local structure for the CdSe/ZnSe quantum dots grown by molecular beam epitaxy (MBE) and migration-enhanced epitaxy (MEE). The aim was to study the intermixing of Cd and Zn atoms, chemical compositions and strain induced by cap-layer. The EXAFS at the Cd K-edge and DAFS at the Se K-edge proved the intermixing of Cd and Zn atoms. The distances Cd-Se (2.61 angstrom) found from EXAFS and DAFS analysis for h(1) region is closer to that in bulk CdSe (2.62 angstrom). The DAFS analysis revealed the differences in the local structure in two investigated regions (i.e. different iso-strain volumes) on the quantum dots. It was found that the investigated areas differ in the Cd concentration. To explain the experimental results the theoretical calculation based on a full valence-force field (VFF) model was performed. The theoretical VFF model fully explains the experimental data. (C) 2012 Elsevier B. V. All rights reserved.
ER -
PISKORSKA-HOMMEL, E., Václav HOLÝ, Ondřej CAHA, A. WOLSKA, A. GUST, C. KRUSE, H. KROENCKE, J. FALTA a D. HOMMEL. Complementary information on CdSe/ZnSe quantum dot local structure from extended X-ray absorption fine structure and diffraction anomalous fine structure measurements. \textit{Journal of Alloys and Compounds}. LAUSANNE: Elsevier, 2012, roč.~523, May, s.~155-160. ISSN~0925-8388. Dostupné z: https://dx.doi.org/10.1016/j.jallcom.2012.01.133.
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