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.

Základní údaje

Originální název

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

Název česky

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

Autoři

PISKORSKA-HOMMEL, E. (276 Německo), Václav HOLÝ (203 Česká republika, garant), Ondřej CAHA (203 Česká republika, domácí), A. WOLSKA (616 Polsko), A. GUST (616 Polsko), C. KRUSE (276 Německo), H. KROENCKE (276 Německo), J. FALTA (276 Německo) a D. HOMMEL (804 Ukrajina)

Vydání

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

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 2.390

Kód RIV

RIV/00216224:14740/12:00064679

Organizační jednotka

Středoevropský technologický institut

DOI

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

UT WoS

000301387400026

Klíčová slova česky

CdSe; kvantové tečky; EXAFS; DAFS

Klíčová slova anglicky

CdSe; quantum dots; EXAFS; DAFS

Štítky

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 16. 8. 2013 14:38, doc. Mgr. Ondřej Caha, Ph.D.

Anotace

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.

Česky

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

Návaznosti

ED2.1.00/03.0086, projekt VaV

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

MSM0021622410, záměr

Název: Fyzikální a chemické vlastnosti pokročilých materiálů a struktur

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Fyzikální a chemické vlastnosti pokročilých materiálů a struktur

Citovat

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.

@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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