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Strain in InP/ZnSe, S core/shell quantum dots from lattice mismatch and shell thickness : material stiffness influence

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Abstract
We investigate the buildup of strain in InP quantum dots with the addition of shells of the lower-lattice constant materials ZnSe and ZnS by Raman spectroscopy. Both materials induce compressive strain in the core, which increases with increasing shell volume. We observe a difference in the shell behavior between the two materials: the thickness-dependence points toward an influence of the material stiffness. ZnS has a larger Young's modulus and requires less material to develop stress on the InP lattice at the interface, while ZnSe requires several layers to form a stress-inducing lattice at the interface. This hints at the material stiffness being an additional parameter of relevance for designing strained core/shell quantum dots.
Keywords
COLLOIDAL NANOCRYSTALS, INP

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MLA
Rafipoor, Mona, et al. “Strain in InP/ZnSe, S Core/Shell Quantum Dots from Lattice Mismatch and Shell Thickness : Material Stiffness Influence.” JOURNAL OF CHEMICAL PHYSICS, vol. 151, no. 15, 2019.
APA
Rafipoor, M., Tornatzky, H., Dupont, D., Maultzsch, J., Tessier, M., Hens, Z., & Lange, H. (2019). Strain in InP/ZnSe, S core/shell quantum dots from lattice mismatch and shell thickness : material stiffness influence. JOURNAL OF CHEMICAL PHYSICS, 151(15).
Chicago author-date
Rafipoor, Mona, Hans Tornatzky, Dorian Dupont, Janina Maultzsch, Mickaël Tessier, Zeger Hens, and Holger Lange. 2019. “Strain in InP/ZnSe, S Core/Shell Quantum Dots from Lattice Mismatch and Shell Thickness : Material Stiffness Influence.” JOURNAL OF CHEMICAL PHYSICS 151 (15).
Chicago author-date (all authors)
Rafipoor, Mona, Hans Tornatzky, Dorian Dupont, Janina Maultzsch, Mickaël Tessier, Zeger Hens, and Holger Lange. 2019. “Strain in InP/ZnSe, S Core/Shell Quantum Dots from Lattice Mismatch and Shell Thickness : Material Stiffness Influence.” JOURNAL OF CHEMICAL PHYSICS 151 (15).
Vancouver
1.
Rafipoor M, Tornatzky H, Dupont D, Maultzsch J, Tessier M, Hens Z, et al. Strain in InP/ZnSe, S core/shell quantum dots from lattice mismatch and shell thickness : material stiffness influence. JOURNAL OF CHEMICAL PHYSICS. 2019;151(15).
IEEE
[1]
M. Rafipoor et al., “Strain in InP/ZnSe, S core/shell quantum dots from lattice mismatch and shell thickness : material stiffness influence,” JOURNAL OF CHEMICAL PHYSICS, vol. 151, no. 15, 2019.
@article{8637739,
  abstract     = {We investigate the buildup of strain in InP quantum dots with the addition of shells of the lower-lattice constant materials ZnSe and ZnS by Raman spectroscopy. Both materials induce compressive strain in the core, which increases with increasing shell volume. We observe a difference in the shell behavior between the two materials: the thickness-dependence points toward an influence of the material stiffness. ZnS has a larger Young's modulus and requires less material to develop stress on the InP lattice at the interface, while ZnSe requires several layers to form a stress-inducing lattice at the interface. This hints at the material stiffness being an additional parameter of relevance for designing strained core/shell quantum dots.},
  articleno    = {154704},
  author       = {Rafipoor, Mona and Tornatzky, Hans and Dupont, Dorian and Maultzsch, Janina and Tessier, Mickaël and Hens, Zeger and Lange, Holger},
  issn         = {0021-9606},
  journal      = {JOURNAL OF CHEMICAL PHYSICS},
  keywords     = {COLLOIDAL NANOCRYSTALS,INP},
  language     = {eng},
  number       = {15},
  pages        = {6},
  title        = {Strain in InP/ZnSe, S core/shell quantum dots from lattice mismatch and shell thickness : material stiffness influence},
  url          = {http://dx.doi.org/10.1063/1.5124674},
  volume       = {151},
  year         = {2019},
}

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