Abstract
Transition-metal chalcogenide (TMC) nanoflakes of composition MX2 (where M = Ti, Zr and Hf; X = S and Se) crystallize preferentially in equilateral hexagons and exhibit a pronounced lateral quantum confinement. The hexagonal shape of octahedral (1T) TMC nanoflakes is the result of charge localization at the edges/vertices and the resulting Coulomb repulsion. Independent of their size, all nanoflakes have the MnX2n-2 stoichiometry and thus an unoxidized metal center which results in dopant states. These states become relevant for small nanoflakes and lead to metallic character, but for larger nanoflakes (> 6 nm) the 2D monolayer properties dominate. Finally, coordination of Lewis bases at the nanoflake edges has no significant effect on the electronic structure of these species confirming the viability of colloidal synthetic approaches.
| Original language | English |
|---|---|
| Pages (from-to) | 12624-12628 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 53 |
| Issue number | 46 |
| DOIs | |
| Publication status | Published - 2014 Nov 10 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
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Hexagonal transition-metal chalcogenide nanoflakes with pronounced lateral quantum confinement. / Miró, Pere; Han, Jae Hyo; Cheon, Jinwoo; Heine, Thomas.
In: Angewandte Chemie - International Edition, Vol. 53, No. 46, 10.11.2014, p. 12624-12628.Research output: Contribution to journal › Article
TY - JOUR
T1 - Hexagonal transition-metal chalcogenide nanoflakes with pronounced lateral quantum confinement
AU - Miró, Pere
AU - Han, Jae Hyo
AU - Cheon, Jinwoo
AU - Heine, Thomas
PY - 2014/11/10
Y1 - 2014/11/10
N2 - Transition-metal chalcogenide (TMC) nanoflakes of composition MX2 (where M = Ti, Zr and Hf; X = S and Se) crystallize preferentially in equilateral hexagons and exhibit a pronounced lateral quantum confinement. The hexagonal shape of octahedral (1T) TMC nanoflakes is the result of charge localization at the edges/vertices and the resulting Coulomb repulsion. Independent of their size, all nanoflakes have the MnX2n-2 stoichiometry and thus an unoxidized metal center which results in dopant states. These states become relevant for small nanoflakes and lead to metallic character, but for larger nanoflakes (> 6 nm) the 2D monolayer properties dominate. Finally, coordination of Lewis bases at the nanoflake edges has no significant effect on the electronic structure of these species confirming the viability of colloidal synthetic approaches.
AB - Transition-metal chalcogenide (TMC) nanoflakes of composition MX2 (where M = Ti, Zr and Hf; X = S and Se) crystallize preferentially in equilateral hexagons and exhibit a pronounced lateral quantum confinement. The hexagonal shape of octahedral (1T) TMC nanoflakes is the result of charge localization at the edges/vertices and the resulting Coulomb repulsion. Independent of their size, all nanoflakes have the MnX2n-2 stoichiometry and thus an unoxidized metal center which results in dopant states. These states become relevant for small nanoflakes and lead to metallic character, but for larger nanoflakes (> 6 nm) the 2D monolayer properties dominate. Finally, coordination of Lewis bases at the nanoflake edges has no significant effect on the electronic structure of these species confirming the viability of colloidal synthetic approaches.
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U2 - 10.1002/anie.201404704
DO - 10.1002/anie.201404704
M3 - Article
VL - 53
SP - 12624
EP - 12628
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 46
ER -