Nanocrystal Core Size and Shape Substitutional Doping and Underlying Crystalline Order in Nanocrystal Superlattices

Davit Jishkariani; Katherine C. Elbert; Yaoting Wu; Jennifer D. Lee; Michiel Hermes; Da Wang; Alfons Van Blaaderen; Christopher B. Murray

doi:10.1021/acsnano.9b01107

Nanocrystal Core Size and Shape Substitutional Doping and Underlying Crystalline Order in Nanocrystal Superlattices

Davit Jishkariani, Katherine C. Elbert, Yaoting Wu, Jennifer D. Lee, Michiel Hermes, Da Wang, Alfons Van Blaaderen, Christopher B. Murray^*

^*Corresponding author for this work

University of Pennsylvania

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Substitutional doping is a potentially powerful technique to control the properties of nanocrystal (NC) superlattices (SLs). However, not every NC can be substituted into any lattice, as the NCs have to be close in size and shape, limiting the application of substitutional doping. Here we show that this limitation can be overcome by employing ligands of various size. We show that small NCs with long ligands can be substituted into SLs of big NCs with short ligands. Furthermore, we show that shape differences can also be overcome and that cubes can substitute spheres when both are coated with long ligands. Finally, we use the NC effective ligand size, softness, and effective overall size ratio to explain observed doping behaviors.

Original language	English
Pages (from-to)	5712-5719
Number of pages	8
Journal	ACS Nano
Volume	13
Issue number	5
DOIs	https://doi.org/10.1021/acsnano.9b01107
Publication status	Published - 28 May 2019

Keywords

dendritic ligands
nanocrystal positional preference analysis
nanocrystal softness
self-assembly
substitutional doping

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10.1021/acsnano.9b01107

acsnano.9b01107Final published version, 3.77 MBLicence: Taverne

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title = "Nanocrystal Core Size and Shape Substitutional Doping and Underlying Crystalline Order in Nanocrystal Superlattices",

abstract = "Substitutional doping is a potentially powerful technique to control the properties of nanocrystal (NC) superlattices (SLs). However, not every NC can be substituted into any lattice, as the NCs have to be close in size and shape, limiting the application of substitutional doping. Here we show that this limitation can be overcome by employing ligands of various size. We show that small NCs with long ligands can be substituted into SLs of big NCs with short ligands. Furthermore, we show that shape differences can also be overcome and that cubes can substitute spheres when both are coated with long ligands. Finally, we use the NC effective ligand size, softness, and effective overall size ratio to explain observed doping behaviors.",

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author = "Davit Jishkariani and Elbert, {Katherine C.} and Yaoting Wu and Lee, {Jennifer D.} and Michiel Hermes and Da Wang and {Van Blaaderen}, Alfons and Murray, {Christopher B.}",

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doi = "10.1021/acsnano.9b01107",

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T1 - Nanocrystal Core Size and Shape Substitutional Doping and Underlying Crystalline Order in Nanocrystal Superlattices

AU - Jishkariani, Davit

AU - Elbert, Katherine C.

AU - Wu, Yaoting

AU - Lee, Jennifer D.

AU - Hermes, Michiel

AU - Wang, Da

AU - Van Blaaderen, Alfons

AU - Murray, Christopher B.

PY - 2019/5/28

Y1 - 2019/5/28

N2 - Substitutional doping is a potentially powerful technique to control the properties of nanocrystal (NC) superlattices (SLs). However, not every NC can be substituted into any lattice, as the NCs have to be close in size and shape, limiting the application of substitutional doping. Here we show that this limitation can be overcome by employing ligands of various size. We show that small NCs with long ligands can be substituted into SLs of big NCs with short ligands. Furthermore, we show that shape differences can also be overcome and that cubes can substitute spheres when both are coated with long ligands. Finally, we use the NC effective ligand size, softness, and effective overall size ratio to explain observed doping behaviors.

AB - Substitutional doping is a potentially powerful technique to control the properties of nanocrystal (NC) superlattices (SLs). However, not every NC can be substituted into any lattice, as the NCs have to be close in size and shape, limiting the application of substitutional doping. Here we show that this limitation can be overcome by employing ligands of various size. We show that small NCs with long ligands can be substituted into SLs of big NCs with short ligands. Furthermore, we show that shape differences can also be overcome and that cubes can substitute spheres when both are coated with long ligands. Finally, we use the NC effective ligand size, softness, and effective overall size ratio to explain observed doping behaviors.

KW - dendritic ligands

KW - nanocrystal positional preference analysis

KW - nanocrystal softness

KW - self-assembly

KW - substitutional doping

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Nanocrystal Core Size and Shape Substitutional Doping and Underlying Crystalline Order in Nanocrystal Superlattices

Abstract

Keywords

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