Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites

Pule V. Raleaooa; Andreas Roodt; Gugu G. Mhlongo; David E. Motaung; Robin E. Kroon; Odireleng M. Ntwaeaborwa

doi:10.1016/j.physb.2016.11.031

Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites

Pule V. Raleaooa, Andreas Roodt, Gugu G. Mhlongo, David E. Motaung, Robin E. Kroon, Odireleng M. Ntwaeaborwa

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

55 Citations (Scopus)

Abstract

The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ZnO-ZnS nanocomposites. The nanocomposites exhibited particle morphology different from that of ZnO and ZnS nanoparticles. The ZnO and ZnS nanoparticles exhibited quantum confinement as inferred from the widening of their respective bandgap energies. The electron paramagnetic resonance data provided evidence for the existence of magnetic clusters near the surface, electron to nuclei interactions and defect states. The ZnO-ZnS nanocomposites exhibited tunable emission that was dependent on the ratio of ZnO to ZnS. These composites were evaluated for application in different types of light emitting devices.

Original language	English
Pages (from-to)	13-20
Number of pages	8
Journal	Physica B: Condensed Matter
Volume	507
DOIs	https://doi.org/10.1016/j.physb.2016.11.031
Publication status	Published - 15 Feb 2017
Externally published	Yes

Keywords

Ex-situ
Nanocomposites
Nanoparticles
Phosphors
Photoluminescence
Sol-gel

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2016.11.031

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title = "Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites",

abstract = "The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ZnO-ZnS nanocomposites. The nanocomposites exhibited particle morphology different from that of ZnO and ZnS nanoparticles. The ZnO and ZnS nanoparticles exhibited quantum confinement as inferred from the widening of their respective bandgap energies. The electron paramagnetic resonance data provided evidence for the existence of magnetic clusters near the surface, electron to nuclei interactions and defect states. The ZnO-ZnS nanocomposites exhibited tunable emission that was dependent on the ratio of ZnO to ZnS. These composites were evaluated for application in different types of light emitting devices.",

keywords = "Ex-situ, Nanocomposites, Nanoparticles, Phosphors, Photoluminescence, Sol-gel",

author = "Raleaooa, {Pule V.} and Andreas Roodt and Mhlongo, {Gugu G.} and Motaung, {David E.} and Kroon, {Robin E.} and Ntwaeaborwa, {Odireleng M.}",

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AU - Raleaooa, Pule V.

AU - Roodt, Andreas

AU - Mhlongo, Gugu G.

AU - Motaung, David E.

AU - Kroon, Robin E.

AU - Ntwaeaborwa, Odireleng M.

PY - 2017/2/15

Y1 - 2017/2/15

N2 - The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ZnO-ZnS nanocomposites. The nanocomposites exhibited particle morphology different from that of ZnO and ZnS nanoparticles. The ZnO and ZnS nanoparticles exhibited quantum confinement as inferred from the widening of their respective bandgap energies. The electron paramagnetic resonance data provided evidence for the existence of magnetic clusters near the surface, electron to nuclei interactions and defect states. The ZnO-ZnS nanocomposites exhibited tunable emission that was dependent on the ratio of ZnO to ZnS. These composites were evaluated for application in different types of light emitting devices.

AB - The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ZnO-ZnS nanocomposites. The nanocomposites exhibited particle morphology different from that of ZnO and ZnS nanoparticles. The ZnO and ZnS nanoparticles exhibited quantum confinement as inferred from the widening of their respective bandgap energies. The electron paramagnetic resonance data provided evidence for the existence of magnetic clusters near the surface, electron to nuclei interactions and defect states. The ZnO-ZnS nanocomposites exhibited tunable emission that was dependent on the ratio of ZnO to ZnS. These composites were evaluated for application in different types of light emitting devices.

KW - Ex-situ

KW - Nanocomposites

KW - Nanoparticles

KW - Phosphors

KW - Photoluminescence

KW - Sol-gel

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DO - 10.1016/j.physb.2016.11.031

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SN - 0921-4526

VL - 507

SP - 13

EP - 20

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites

Abstract

Keywords

ASJC Scopus subject areas

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