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Architectonic Quantum Dot Solids

Markovich, Gil and Collier, C. Patrick and Henrichs, Sven E. and Remacle, Françoise and Levine, Raphael D. and Heath, James R. (1999) Architectonic Quantum Dot Solids. Accounts of Chemical Research, 32 (5). pp. 415-423. ISSN 0001-4842. doi:10.1021/ar980039x.

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Three things largely determine the electronic properties of a crystal:  the energy levels of the atoms or lattice sites, the coupling between adjacent sites, and the symmetry of the solid. Imagine being able to control each of these properties separately, and therefore being able to “design” a solid with a prescribed set of electronic properties. For an atomic solid, this would amount to being able to tune the electronegativity of an atom, to control the strength of the covalent interactions within the lattice, and to choose the crystal structure. While the chemistry of the periodic table does not permit such control, the chemistry of “artificial atoms”,1 or quantum dots (QDs), does. In this Account, we will discuss one example of “designing” a unique electronic property into a QD solid. This property, which is the ability of the solid to reversibly pass through a metal−insulator (MI) transition under ambient conditions, is something that has not been previously demonstrated for a more traditional solid. A two-dimensional (2D) hexagonal superlattice of organically passivated silver QDs was fabricated as a Langmuir monolayer. Selecting a particular size of QD controlled the (super)lattice site energies. The coupling between adjacent QDs was coarsely controlled by selection of the organic surface passivant, and precisely controlled by compressing the superlattice using the Langmuir technique. By using the title “Architectonic2 Quantum Dot Solids”, we emphasize that many of the collective properties of the superlattice were rationally designed into the material.

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Heath, James R.0000-0001-5356-4385
Additional Information:© 1999 American Chemical Society. Received 4 May 1998. Published online 8 January 1999. Published in print 1 May 1999. We acknowledge R. Saykally, C. Knobler, W. Gelbart, R. Shen, J. Shiang, S. Williams, G. Madeiros-Ribeiro, and D. Ohldberg. J.R.H. acknowledges support from the ONR, the NSF, a Packard Fellowship, and a Sloan Fellowship.
Funding AgencyGrant Number
Office of Naval Research (ONR)UNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Issue or Number:5
Record Number:CaltechAUTHORS:20180302-080943418
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Official Citation:Architectonic Quantum Dot Solids Gil Markovich, C. Patrick Collier, Sven E. Henrichs, Françoise Remacle, Raphael D. Levine, and James R. Heath Accounts of Chemical Research 1999 32 (5), 415-423 DOI: 10.1021/ar980039x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85054
Deposited By: Ruth Sustaita
Deposited On:02 Mar 2018 22:06
Last Modified:15 Nov 2021 20:25

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