Colloidal nanocrystal heterostructures with linear and branched topology

Nature
Delia J MillironA Paul Alivisatos

Abstract

The development of colloidal quantum dots has led to practical applications of quantum confinement, such as in solution-processed solar cells, lasers and as biological labels. Further scientific and technological advances should be achievable if these colloidal quantum systems could be electronically coupled in a general way. For example, this was the case when it became possible to couple solid-state embedded quantum dots into quantum dot molecules. Similarly, the preparation of nanowires with linear alternating compositions--another form of coupled quantum dots--has led to the rapid development of single-nanowire light-emitting diodes and single-electron transistors. Current strategies to connect colloidal quantum dots use organic coupling agents, which suffer from limited control over coupling parameters and over the geometry and complexity of assemblies. Here we demonstrate a general approach for fabricating inorganically coupled colloidal quantum dots and rods, connected epitaxially at branched and linear junctions within single nanocrystals. We achieve control over branching and composition throughout the growth of nanocrystal heterostructures to independently tune the properties of each component and the nature of their ...Continue Reading

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Citations

Jan 5, 2011·ACS Applied Materials & Interfaces·Shannon C RihaB A Parkinson
Nov 10, 2011·ACS Applied Materials & Interfaces·Deodatta R ShindeS K Gupta
Feb 22, 2013·ACS Applied Materials & Interfaces·Ronit FreemanItamar Willner
Nov 5, 2013·ACS Applied Materials & Interfaces·Debasish SarkarKalyan Mandal
Feb 2, 2013·Accounts of Chemical Research·Hongbo LiLiberato Manna
Dec 12, 2012·Chemistry of Materials : a Publication of the American Chemical Society·Jonathan D DollFotios Papadimitrakopoulos
Mar 14, 2012·Inorganic Chemistry·Xingbo LiPiaoping Yang
Nov 18, 2010·Journal of the American Chemical Society·Wenshou WangYadong Yin
Apr 26, 2011·Journal of the American Chemical Society·Matthew T FrederickFranz M Geiger
Aug 11, 2011·Journal of the American Chemical Society·Huimeng WuY Charles Cao
Sep 13, 2011·Journal of the American Chemical Society·Yi-Hsin LiuWilliam E Buhro
Aug 25, 2012·Journal of the American Chemical Society·Aaron L WashingtonGeoffrey F Strouse
Oct 13, 2012·Journal of the American Chemical Society·Benoit MahlerBenoit Dubertret
Mar 6, 2013·Journal of the American Chemical Society·Yi Long LeiShuit Tong Lee
Mar 27, 2013·Journal of the American Chemical Society·Zhaochuan FanMarijn A van Huis
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Jun 9, 2011·ACS Nano·Ehud ShavivCarsten Sönnichsen

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