Tailoring the physical properties of thiol-capped PbS quantum dots by thermal annealing

Turyanska, L. and Elfurawi, U. and Li, M. and Fay, M. W. and Thomas, N. R. and Mann, S. and Blokland, J. H. and Christianen, P. C. M. and Patane, A. (2009) Tailoring the physical properties of thiol-capped PbS quantum dots by thermal annealing. Nanotechnology, 20 (31). ISSN 0957-4484

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Abstract

We show that the thermal annealing of thiol-capped PbS colloidal quantum dots provides a means of narrowing the nanoparticle size distribution, increasing the size of the quantum dots and facilitating their coalescence preferentially along the <100> crystallographic axes. We exploit these phenomena to tune the photoluminescence emission of an ensemble of dots and to narrow the optical linewidth to values that compare with those reported at room temperature for single PbS quantum dots. We probe the influence of annealing on the electronic properties of the quantum dots by temperature dependent studies of the photoluminescence and magneto-photoluminescence. © 2009 IOP Publishing Ltd.

Keywords:Colloidal quantum dots, Crystallographic axes, Magnetophotoluminescence, Nanoparticle size distribution, Optical linewidth, Photoluminescence emission, Quantum Dot, Room temperature, Temperature dependent, Thermal-annealing, Annealing, Coalescence, Electronic properties, Photoluminescence, Semiconducting lead compounds, Semiconductor quantum dots, lead sulfide, nanoparticle, thiol, lead, lead sulfide, sulfide, thiol derivative, article, controlled study, crystallography, electronics, morphology, particle size, physical chemistry, priority journal, thermal annealing, thermal exposure, transmission electron microscopy, chemistry, colloid, heating, luminescence, temperature, Colloids, Microscopy, Electron, Transmission, Quantum Dots, Sulfhydryl Compounds, Sulfides, Temperature
Subjects:F Physical Sciences > F300 Physics
Divisions:College of Science > School of Chemistry
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ID Code:22526
Deposited On:30 Mar 2016 09:24

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