Details
| Original language | English |
|---|---|
| Pages (from-to) | 4234-4238 |
| Number of pages | 5 |
| Journal | Crystal growth & design |
| Volume | 19 |
| Issue number | 8 |
| Early online date | 25 Jun 2019 |
| Publication status | Published - 7 Aug 2019 |
| Externally published | Yes |
Abstract
Shape-property correlations of nanocrystals have recently moved into focus in materials science research. Magnetic properties, for instance, depend strongly on shape. Because crystal morphology is determined by a certain set of lattice planes (hkl) representing the surfaces, the achievable shapes are set by crystallographic symmetry. For instance, for a cubic crystal (90° angles) system it is very hard to realize hexagonal crystal shapes (120° angles). Breaking this paradigm is, thus, highly challenging. Here, we present a synthesis concept suitable for the synthesis of atypical Europium(II) oxide (EuO) particles. EuO is interesting as it is one of few materials known that belong to the class of intrinsic ferromagnetic semiconductors. It is shown that ZnO nanoparticles (rod-like, hexagonal platelets, spherical, and dumbbells) act as a sacrificial template and can be converted to the corresponding EuO particles by preservation of structural features, when treated with Eu-vapor. The transformation proceeds via a Kirkendall mechanism. This new reaction pathway enhances the accessibility of EuO particles tremendously and enables systematic studies on the magnetic shape property relationships of this highly functional metal oxide.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Crystal growth & design, Vol. 19, No. 8, 07.08.2019, p. 4234-4238.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Sacrificial Templating
T2 - A Route to Europium-II Oxide (EuO) Particles with Arbitrary Shape Prepared Indirectly by Hostile Takeover
AU - Trepka, Bastian
AU - Emminger, Yannick H.
AU - Schneider, Nicolas
AU - Schlötter, Moritz
AU - Theiss, Sebastian
AU - Wimmer, Ilona
AU - Fonin, Mikhail
AU - Polarz, Sebastian
N1 - The authors gratefully acknowledge financial support from the German Research Foundation (DFG) via SFB1214 Project A5 and Project A1. The authors gratefully acknowledge technical/instrumental support from the German Research Foundation (DFG) via SFB1214 Project Z1 Particle Analysis Center.
PY - 2019/8/7
Y1 - 2019/8/7
N2 - Shape-property correlations of nanocrystals have recently moved into focus in materials science research. Magnetic properties, for instance, depend strongly on shape. Because crystal morphology is determined by a certain set of lattice planes (hkl) representing the surfaces, the achievable shapes are set by crystallographic symmetry. For instance, for a cubic crystal (90° angles) system it is very hard to realize hexagonal crystal shapes (120° angles). Breaking this paradigm is, thus, highly challenging. Here, we present a synthesis concept suitable for the synthesis of atypical Europium(II) oxide (EuO) particles. EuO is interesting as it is one of few materials known that belong to the class of intrinsic ferromagnetic semiconductors. It is shown that ZnO nanoparticles (rod-like, hexagonal platelets, spherical, and dumbbells) act as a sacrificial template and can be converted to the corresponding EuO particles by preservation of structural features, when treated with Eu-vapor. The transformation proceeds via a Kirkendall mechanism. This new reaction pathway enhances the accessibility of EuO particles tremendously and enables systematic studies on the magnetic shape property relationships of this highly functional metal oxide.
AB - Shape-property correlations of nanocrystals have recently moved into focus in materials science research. Magnetic properties, for instance, depend strongly on shape. Because crystal morphology is determined by a certain set of lattice planes (hkl) representing the surfaces, the achievable shapes are set by crystallographic symmetry. For instance, for a cubic crystal (90° angles) system it is very hard to realize hexagonal crystal shapes (120° angles). Breaking this paradigm is, thus, highly challenging. Here, we present a synthesis concept suitable for the synthesis of atypical Europium(II) oxide (EuO) particles. EuO is interesting as it is one of few materials known that belong to the class of intrinsic ferromagnetic semiconductors. It is shown that ZnO nanoparticles (rod-like, hexagonal platelets, spherical, and dumbbells) act as a sacrificial template and can be converted to the corresponding EuO particles by preservation of structural features, when treated with Eu-vapor. The transformation proceeds via a Kirkendall mechanism. This new reaction pathway enhances the accessibility of EuO particles tremendously and enables systematic studies on the magnetic shape property relationships of this highly functional metal oxide.
UR - http://www.scopus.com/inward/record.url?scp=85068257899&partnerID=8YFLogxK
U2 - 10.1021/acs.cgd.9b00443
DO - 10.1021/acs.cgd.9b00443
M3 - Article
VL - 19
SP - 4234
EP - 4238
JO - Crystal growth & design
JF - Crystal growth & design
SN - 1528-7483
IS - 8
ER -