The role of halogens in the synthesis of semiconductor nanocrystals
Author
Juarez, Beatriz H.Entity
UAM. Departamento de Química Física AplicadaPublisher
Walter de Gruyter GmbHDate
2015-02-28Citation
10.1515/zpch-2014-0594
Zeitschrift fur Physikalische Chemie 229.1-2 (2015): 119-137
ISSN
0942-9352 (print)DOI
10.1515/zpch-2014-0594Funded by
The author thanks the Spanish Ministry of Economy and Competitiveness through MAT-2009-13488 and the Comunidad de Madrid through PHAMA_2.0 S2013/MIT-2740Project
Gobierno de España. MAT-2009-13488; Comunidad de Madrid. S2013/MIT-2740/PHAMAEditor's Version
http://dx.doi.org/10.1515/zpch-2014-0594Subjects
Carbon Nanotubes-Semiconductor Nanocrystals Composites; Chlorine Solvents; Electrochemistry of Nanocrystals; Halide Anions; Hybrid Systems; NMR Ligand Sphere Characterization; Semiconductor Nanocrystals; Shape Transformation; XPS Studies; QuímicaRights
© 2014 Walter de Gruyter Berlin/BostonAbstract
The presence of halogen compounds in the synthesis of semiconductor nanocrystals (NCs) produced by hot injection drastically influence their capping ligand sphere and/or chemical reactivity, allowing for the growth of hybrid systems, including composites combining NCs decorating carbon sp2 surfaces. As a result, the presence of halide anions on the surface of some NCs has proven to have a positive impact on the optical and electrical properties. In this work the effects that halogen co-solvents (including alkylchlorides, bromides, and iodides) induce in the synthesis of rod-like Wurtzite CdSe NCs generated by hot-injection will be reviewed. The proposed mechanism of the reaction as well as a detailed characterization of the capping ligand sphere by Nuclear Magnetic Resonance (NMR) and X-Ray photoelectron Spectroscopy (XPS) will be discussed. Correlated cyclic voltammetry (CV) and XPS studies have been performed to address the effect of the halide anions on the NCs surface. Finally an example of the effect of the addition of chlorine-containing co-solvents on the synthesis of PbS rock-salt NCs will be shown
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