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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus


IMPACT FACTOR 2017: 1.144
5-year IMPACT FACTOR: 1.144

CiteScore 2018: 1.20

SCImago Journal Rank (SJR) 2018: 0.327
Source Normalized Impact per Paper (SNIP) 2018: 0.391

Online
ISSN
2196-7156
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Volume 229, Issue 1-2

Issues

The Role of Halogens in the Synthesis of Semiconductor Nanocrystals

Beatriz H. Juarez
  • Corresponding author
  • Applied Physical-Chemistry Department, Universidad Autónoma de Madrid, Francisco Tomás y Valiente 7, Campus Cantoblanco, Madrid 28049, Spain
  • IMDEA Nanoscience, Faraday 9, 28049, Campus Cantoblanco, Madrid, Spain
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Published Online: 2014-11-28 | DOI: https://doi.org/10.1515/zpch-2014-0594

Abstract

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.

Keywords: Semiconductor Nanocrystals; Halide Anions; Chlorine Solvents; Shape Transformation; Hybrid Systems; Carbon Nanotubes-Semiconductor Nanocrystals Composites; NMR Ligand Sphere Characterization; XPS Studies; Electrochemistry of Nanocrystals

About the article

Accepted: 2014-11-04

Received: 2014-08-27

Published Online: 2014-11-28

Published in Print: 2015-02-28


Citation Information: Zeitschrift für Physikalische Chemie, Volume 229, Issue 1-2, Pages 119–137, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2014-0594.

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