Volume 2015, Issue 4 p. 706-714
Full Paper

An Effective Two-Emulsion Approach to the Synthesis of Doped ZnS Crystalline Nanostructures

Paolo Dolcet

Paolo Dolcet

Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy, http://www.chimica.unipd.it/silvia.gross

Istituto per l'Energetica e le Interfasi, IENI-CNR and INSTM, UdR di Padova, Via Marzolo 1, 35131 Padova, Italy

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Chiara Maurizio

Chiara Maurizio

Dipartimento di Fisica ed Astronomia, Università degli Studi di Padova, Via Marzolo 8, 35131 Padova, Italy

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Maurizio Casarin

Maurizio Casarin

Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy, http://www.chimica.unipd.it/silvia.gross

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Luciano Pandolfo

Luciano Pandolfo

Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy, http://www.chimica.unipd.it/silvia.gross

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Stefano Gialanella

Stefano Gialanella

Dipartimento di Ingegneria Industriale, Università degli Studi di Trento, Via Sommarive 9, 38123 Trento, Italy

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Denis Badocco

Denis Badocco

Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy, http://www.chimica.unipd.it/silvia.gross

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Paolo Pastore

Paolo Pastore

Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy, http://www.chimica.unipd.it/silvia.gross

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Adolfo Speghini

Adolfo Speghini

Dipartimento di Biotecnologie, Università degli Studi di Verona and INSTM, UdR Verona, Strada Le Grazie 15, 37314 Verona, Italy

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Silvia Gross

Corresponding Author

Silvia Gross

Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy, http://www.chimica.unipd.it/silvia.gross

Istituto per l'Energetica e le Interfasi, IENI-CNR and INSTM, UdR di Padova, Via Marzolo 1, 35131 Padova, Italy

Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, ItalySearch for more papers by this author
First published: 08 January 2015
Citations: 14

Graphical Abstract

We report the use of miniemulsions for the controlled synthesis of M-doped (M = CuII, MnII, SmIII, GdIII, or TbII) ZnS nanostructures (with crystallite size of 5–10 nm). The adopted synthetic route is ideally suited to easily achieve small particle sizes and narrow size distribution. The incorporation of the doping ions in the matrix is discussed.

Abstract

The controlled, room-temperature synthesis of M-doped (M = CuII, MnII, SmIII, GdIII, or TbII) ZnS nanostructures (with an average crystallite size of 5–10 nm) in the confined space of miniemulsion droplets is reported herein and discussed. The adopted synthetic route is a colloidal method, ideally suited to easily achieve small particle size and narrow size distribution. The synthesized functional nanostructures crystallize in the sphalerite lattice, as determined by powder X-ray diffraction. In addition to structural characterization, several complementary techniques, such as X-ray photoelectron spectroscopy, thermogravimetric analysis, differential scanning calorimetry, micro-Raman spectroscopy, inductively coupled plasma mass spectrometry, and Fourier transform infrared spectroscopy were used to determine chemical and physical properties as well as the microstructural features of our products. As far as the morphological aspects of the obtained samples are concerned, they were studied by means of scanning and transmission electron microscopies. Finally, the local structure around dopant ions was unravelled by means of X-ray absorption spectroscopy, in particular through extended X-ray absorption fine structure measurements carried out at the Zn, S, and dopant K or L3 edges. This information has been complemented with the investigation of the photoluminescence properties.