Dipolar structures in colloidal dispersions of PbSe and CdSe quantum dots

M. Klokkenburg; A.J. Houtepen; R. Koole; J.W.J. de Folter; B.H. Erne; E.E.H. van Faassen; D.A.M. Vanmaekelbergh

Dipolar structures in colloidal dispersions of PbSe and CdSe quantum dots

M. Klokkenburg, A.J. Houtepen, R. Koole, J.W.J. de Folter, B.H. Erne, E.E.H. van Faassen, D.A.M. Vanmaekelbergh

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Abstract

We show by cryogenic transmission electron microscopy that PbSe and CdSe nanocrystals of various shapes in a liquid colloidal dispersion self-assemble into equilibrium structures that have a pronounced dipolar character, to an extent that depends on particle concentration and size. Analyzing the cluster-size distributions with a one-dimensional (1D) aggregation model yields a dipolar pair attraction of 8-10 kBT at room temperature. This accounts for the long-range alignment of the crystal planes of individual nanocrystals in self-assembled superstructures and for anisotropic nanostructures grown via oriented attachment.

Original language	Undefined/Unknown
Pages (from-to)	2931-2936
Number of pages	6
Journal	Nano Letters
Volume	7
Issue number	9
Publication status	Published - 2007

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Cite this

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title = "Dipolar structures in colloidal dispersions of PbSe and CdSe quantum dots",

abstract = "We show by cryogenic transmission electron microscopy that PbSe and CdSe nanocrystals of various shapes in a liquid colloidal dispersion self-assemble into equilibrium structures that have a pronounced dipolar character, to an extent that depends on particle concentration and size. Analyzing the cluster-size distributions with a one-dimensional (1D) aggregation model yields a dipolar pair attraction of 8-10 kBT at room temperature. This accounts for the long-range alignment of the crystal planes of individual nanocrystals in self-assembled superstructures and for anisotropic nanostructures grown via oriented attachment.",

author = "M. Klokkenburg and A.J. Houtepen and R. Koole and {de Folter}, J.W.J. and B.H. Erne and {van Faassen}, E.E.H. and D.A.M. Vanmaekelbergh",

year = "2007",

language = "Undefined/Unknown",

volume = "7",

pages = "2931--2936",

journal = "Nano Letters",

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TY - JOUR

T1 - Dipolar structures in colloidal dispersions of PbSe and CdSe quantum dots

AU - Klokkenburg, M.

AU - Houtepen, A.J.

AU - Koole, R.

AU - de Folter, J.W.J.

AU - Erne, B.H.

AU - van Faassen, E.E.H.

AU - Vanmaekelbergh, D.A.M.

PY - 2007

Y1 - 2007

N2 - We show by cryogenic transmission electron microscopy that PbSe and CdSe nanocrystals of various shapes in a liquid colloidal dispersion self-assemble into equilibrium structures that have a pronounced dipolar character, to an extent that depends on particle concentration and size. Analyzing the cluster-size distributions with a one-dimensional (1D) aggregation model yields a dipolar pair attraction of 8-10 kBT at room temperature. This accounts for the long-range alignment of the crystal planes of individual nanocrystals in self-assembled superstructures and for anisotropic nanostructures grown via oriented attachment.

AB - We show by cryogenic transmission electron microscopy that PbSe and CdSe nanocrystals of various shapes in a liquid colloidal dispersion self-assemble into equilibrium structures that have a pronounced dipolar character, to an extent that depends on particle concentration and size. Analyzing the cluster-size distributions with a one-dimensional (1D) aggregation model yields a dipolar pair attraction of 8-10 kBT at room temperature. This accounts for the long-range alignment of the crystal planes of individual nanocrystals in self-assembled superstructures and for anisotropic nanostructures grown via oriented attachment.

M3 - Article

SN - 1530-6984

VL - 7

SP - 2931

EP - 2936

JO - Nano Letters

JF - Nano Letters

IS - 9

ER -