Complementary information on CdSe/ZnSe quantum dot local
structure from extended X-ray absorption fine structure and
diffraction anomalous fine structure measurements

J 2012

Complementary information on CdSe/ZnSe quantum dot local structure from extended X-ray absorption fine structure and diffraction anomalous fine structure measurements

PISKORSKA-HOMMEL, E., Václav HOLÝ, Ondřej CAHA, A. WOLSKA, A. GUST et. al.

Basic information

Original name

Complementary information on CdSe/ZnSe quantum dot local structure from extended X-ray absorption fine structure and diffraction anomalous fine structure measurements

Name in Czech

Komplementární informace o lokální struktuře CdSe/ZnSe kvantových teček z EXAFS a DAFS měření

Authors

PISKORSKA-HOMMEL, E. (276 Germany), Václav HOLÝ (203 Czech Republic, guarantor), Ondřej CAHA (203 Czech Republic, belonging to the institution), A. WOLSKA (616 Poland), A. GUST (616 Poland), C. KRUSE (276 Germany), H. KROENCKE (276 Germany), J. FALTA (276 Germany) and D. HOMMEL (804 Ukraine)

Edition

Journal of Alloys and Compounds, LAUSANNE, Elsevier, 2012, 0925-8388

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10302 Condensed matter physics

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 2.390

RIV identification code

RIV/00216224:14740/12:00064679

Organization unit

Central European Institute of Technology

DOI

http://dx.doi.org/10.1016/j.jallcom.2012.01.133

UT WoS

000301387400026

Keywords (in Czech)

CdSe; kvantové tečky; EXAFS; DAFS

Keywords in English

CdSe; quantum dots; EXAFS; DAFS

Abstract

ORIG CZ

V originále

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.

In Czech

EXAFS a DAFS bylo aplikováno na studium struktury CdSe/ZnSe kvantových teček.

Links

ED2.1.00/03.0086, research and development project

Name: Regionální VaV centrum pro nízkonákladové plazmové a nanotechnologické povrchové úpravy

MSM0021622410, plan (intention)

Name: Fyzikální a chemické vlastnosti pokročilých materiálů a struktur

Investor: Ministry of Education, Youth and Sports of the CR, Physical and chemical properties of advanced materials and structures

Citovat

PISKORSKA-HOMMEL, E., Václav HOLÝ, Ondřej CAHA, A. WOLSKA, A. GUST, C. KRUSE, H. KROENCKE, J. FALTA and 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, vol. 523, May, p. 155-160. ISSN 0925-8388. Available from: https://dx.doi.org/10.1016/j.jallcom.2012.01.133.

@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 and 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, vol.~523, May, p.~155-160. ISSN~0925-8388. Available from: https://dx.doi.org/10.1016/j.jallcom.2012.01.133.

Detailed Information on Publication Record