Cadmium selenide: Surface and nanoparticle energetics

Fen Xu; Wei Zhou; Alexandra Navrotsky

doi:10.1557/jmr.2011.20

Cadmium selenide: Surface and nanoparticle energetics

Fen Xu, Wei Zhou, Alexandra Navrotsky

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Cadmium selenide (CdSe) belongs to a class of important II-VI semiconductors widely used in optical, sensor, and laser materials and quantum-dot light-emitting diodes. Here we present the first direct calorimetric measurement of the surface energy of wurtzite CdSe. CdSe nanoparticles with particle size between 20 and 60 nm were prepared by a hydrothermal method without additives to control morphology, and the surface energy was derived from the drop solution enthalpies in molten sodium molybdate and from water adsorption calorimetry. The surface energy of the hydrated surface is 1.31 ± 0.26 J/m², whereas that of the anhydrous surface is 1.65 ± 0.27 J/m². These values are significantly lower than those for ZnO and many other oxides.

Original language	English (US)
Pages (from-to)	720-725
Number of pages	6
Journal	Journal of Materials Research
Volume	26
Issue number	5
DOIs	https://doi.org/10.1557/jmr.2011.20
State	Published - Mar 14 2011
Externally published	Yes

Keywords

Cd
Nanoscale
Se

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/jmr.2011.20

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abstract = "Cadmium selenide (CdSe) belongs to a class of important II-VI semiconductors widely used in optical, sensor, and laser materials and quantum-dot light-emitting diodes. Here we present the first direct calorimetric measurement of the surface energy of wurtzite CdSe. CdSe nanoparticles with particle size between 20 and 60 nm were prepared by a hydrothermal method without additives to control morphology, and the surface energy was derived from the drop solution enthalpies in molten sodium molybdate and from water adsorption calorimetry. The surface energy of the hydrated surface is 1.31 ± 0.26 J/m2, whereas that of the anhydrous surface is 1.65 ± 0.27 J/m2. These values are significantly lower than those for ZnO and many other oxides.",

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AU - Zhou, Wei

AU - Navrotsky, Alexandra

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N2 - Cadmium selenide (CdSe) belongs to a class of important II-VI semiconductors widely used in optical, sensor, and laser materials and quantum-dot light-emitting diodes. Here we present the first direct calorimetric measurement of the surface energy of wurtzite CdSe. CdSe nanoparticles with particle size between 20 and 60 nm were prepared by a hydrothermal method without additives to control morphology, and the surface energy was derived from the drop solution enthalpies in molten sodium molybdate and from water adsorption calorimetry. The surface energy of the hydrated surface is 1.31 ± 0.26 J/m2, whereas that of the anhydrous surface is 1.65 ± 0.27 J/m2. These values are significantly lower than those for ZnO and many other oxides.

AB - Cadmium selenide (CdSe) belongs to a class of important II-VI semiconductors widely used in optical, sensor, and laser materials and quantum-dot light-emitting diodes. Here we present the first direct calorimetric measurement of the surface energy of wurtzite CdSe. CdSe nanoparticles with particle size between 20 and 60 nm were prepared by a hydrothermal method without additives to control morphology, and the surface energy was derived from the drop solution enthalpies in molten sodium molybdate and from water adsorption calorimetry. The surface energy of the hydrated surface is 1.31 ± 0.26 J/m2, whereas that of the anhydrous surface is 1.65 ± 0.27 J/m2. These values are significantly lower than those for ZnO and many other oxides.

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Cadmium selenide: Surface and nanoparticle energetics

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Keywords

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