ResearchSpace
→
Browsing by Author

Browsing by Author "Nkosi, SS"

Now showing items 1-17 of 17

Antiferromagnetic–paramagnetic state transition of NiO synthesized by pulsed laser deposition

Author: Nkosi, SS ; Yalisi, B ; Motaung, DE ; Keartland, J ; Sideras-Haddad, E ; Forbes, A ; Mwakikunga, Bonex W Date: Jan 2013 Thin films of nickel oxide (NiO) were deposited on Al substrates at different substrate temperatures using pulsed laser deposition (PLD). Microwave power absorption measurements at 9.4 GHz (X-band) were carried out on these PLD grown films. ... Read more
Comparative study: the effect of annealing conditions on the properties of P3HT:PCBM blends

Author: Motaung, DE ; Malgas, GF ; Nkosi, SS ; Mhlongo, Gugu H ; Mwakikunga, Bonex W ; Malwela, T ; Arendse, CJ ; Muller, TFG ; Cummings, FR Date: Feb 2013 This paper presents a detailed study on the role of various annealing treatments on organic poly(3-hexylthiophene) and [6]-phenyl-C(sub61)-butyric acid methyl ester blends under different experimental conditions. A combination of analytical ... Read more
The control of magnetism near metal-to-insulator transitions of VO2 nano-belts

Author: Nkosi, SS ; Lafane, S ; Masina, Bathusile N ; Ndwandwe, OM Date: Dec 2016 The magnetic properties of paramagnetic/weakly ferromagnetic films are strongly affected by the proximity to materials that undergo a metal to insulator phase transition. Here, we show that under the deposition conditions associated with ... Read more
Defect-induced magnetism in undoped and Mn-doped wide band gapzinc oxide grown by aerosol spray pyrolysis

Author: Motaung, DE ; Kortidis, I ; Papadaki, D ; Nkosi, SS ; Mhlongo, Gugu H ; Wesley-Smith, J ; Malgas, GF ; Mwakikunga, Bonex W ; Coetsee, E ; Swart, HC ; Kiriakidis, G ; Ray, SS Date: Aug 2014 We present a systemic study on the structural, optical and magnetic properties of the un-doped and Mn doped ZnO thin films grown by aerosol spray pyrolysis at different deposition times. XRD profilinghas shown that the structures of the ... Read more
The effect of reducing agents on the electronic, magnetic and electrocatalytic properties of thiol-capped Pt/Co and Pt/Ni nanoparticles

Author: Mathe, Ntombizodwa R ; Nkosi, SS ; Motaung, DE ; Scriba, Manfred R ; Coville, NJ Date: May 2015 The electronic, magnetic and electrocatalytic properties of bimetallic thiol-capped Pt/Co and Pt/Ni nanoparticles were synthesised using two reducing agents, NaBH(sub4) and N(sub2)H(sub4). X-ray diffraction analysis of the nanoparticles showed ... Read more
Ferromagnetic resonance characterization of nano-FePt by electron spin resonance

Author: Nkosi, SS ; Gavi, HM ; Motaung, DE ; Keartland, J ; Sideras-Haddad, E ; Forbes, A ; Mwakikunga, Bonex W Date: 2013 Electron spin resonance (ESR) measurements at room temperature and X-band microwave frequency were performed on highly crystalline FePt system thin films. Fairly high DC static magnetic field absorption of about 300 mT was observed in these ... Read more
The influence of ZnO nanostructures on the structure, optical and photovoltaic properties of organic materials

Author: Malgas, GF ; Motaung, DE ; Mhlongo, Gugu H ; Nkosi, SS ; Mwakikunga, Bonex W ; Govendor, M ; Arendse, CJ ; Muller, TFG Date: Mar 2014 Hexagonally shaped zinc-oxide (ZnO) nanorods were synthesized by a simple hydrothermal route. These nanorods were incorporated in a polymer matrix to study the optical and structural properties, improved nanoscale morphology, charge transfer ... Read more
An instant photo-excited electrons relaxation on the photo-degradation properties of TiO2-x films

Author: Nkosi, SS ; Kortidis, I ; Motaung, DE ; Makgwane, Peter R ; Ndwandwe, OM ; Ray, SS ; Kiriakidis, G Date: Nov 2014 Pure and manganese (Mn) ion-doped TiO(sub2) films were grown by pulsed laser deposition under vacuum at different substrate temperatures 350 and 580 C for 50 min each. The concentration of the Mn inTiO(sub2) films was varied from 10 to 30%. ... Read more
Life cycle assessment of facile microwave-assisted zinc oxide (ZnO) nanostructures

Author: Papadaki, D ; Foteinis, S ; Mhlongo, Gugu H ; Nkosi, SS ; Motaung, David E ; Ray, Suprakas S ; Tsoutsos, T ; Kiriakidis, G Date: May 2017 The life cycle assessment of several zinc oxide (ZnO) nanostructures, fabricated by a facile microwave technique, is presented. Key synthesis parameters such as annealing temperature, varied from 90 °C to 220 °C, and microwave power, varied ... Read more
Magnetism variations and susceptibility hysteresis at the metal-insulator phase transition temperature of VO2 in a composite film containing vanadium and tungsten oxides

Author: Akande, AA ; Rammutla, KE ; Moyo, T ; Osman, NSE ; Nkosi, SS ; Jafta, CJ ; Mwakikunga, Bonex W Date: Feb 2015 We report on the magnetic property of 0.67–WO3+0.33–VOx mixture film deposit on the corning glass substrate using the chemical sol–gel and atmospheric pressure chemical vapour deposition (APCVD) methods. The XRD and Raman spectroscopy confirm ... Read more
Optical constants correlated electrons-spin of micro doughnuts of Mn-doped ZnO films

Author: Nkosi, SS ; Kortidis, I ; Motaung, DE ; Keartland, J ; Sideras-Haddad, E ; Forbes, A ; Mwakikunga, Bonex W ; Kiriakidis, G ; Ray, Suprakas S Date: Sep 2013 Diluted magnetic semiconductor (DMS) Mn:ZnO thin films with “ring-like or doughnut-like” structures were grown using aerosol spray pyrolysis for 20 and 30 min. Electron paramagnetic resonance revealed the ferromagnetic ordering which varies ... Read more
Orientation-dependent low field magnetic anomalies and room-temperature spintronic material – Mn doped ZnO films by aerosol spray pyrolysis

Author: Nkosi, SS ; Kortidis, I ; Motaung, DE ; Malgas, GF ; Keartland, J ; Sideras-Haddad, E ; Forbes, A ; Mwakikunga, Bonex W ; Ray, Suprakas S ; Kiriakidis, G Date: Dec 2013 High quality un-doped and Mn-doped ZnO films deposited by a simple aerosol spray pyrolysis technique for 20 and 30 min were studied using electron paramagnetic resonance (EPR), X-ray diffraction (XRD) and atomic force microscopy (AFM) techniques. ... Read more
Selective detection of propanol vapour at low operating temperature utilizing ZnO nanostructures

Author: Kortidis, Ioannis ; Lushozi, S ; Leshabane, N ; Nkosi, SS ; Ndwandwe, OM ; Tshilongo, J ; Ntsasa, N ; Motaung, David E Date: Sep 2019 We report on the propanol vapour (C3H8O) gas sensing characteristics of ZnO nanostructures prepared via hydrothermal assisted method. The ZnO-4h sensor showed a high response (i.e. resistance ratio), sensitivity and selectivity toward C3H8O ... Read more
Shape-selective dependence of room temperature ferromagnetism induced by hierarchical ZnO nanostructures

Author: Motaung, DE ; Mhlongo, Gugu H ; Nkosi, SS ; Malgas, GF ; Mwakikunga, Bonex W ; Coetsee, E ; Swart, HC ; Abdallah, HMI ; Moyo, T ; Ray, SS Date: May 2014 We report on the room temperature ferromagnetism of various highly crystalline zinc oxide (ZnO) nanostructures, such as hexagonally shaped nanorods, nanocups, nanosamoosas, nanoplatelets, and hierarchical nano “flower-like” structures. These ... Read more
Structural and optical properties of ZnO nanostructures grown by aerosol spray pyrolysis: candidates for room temperature methane and hydrogen gas sensing

Author: Motaung, DE ; Mhlongo, Gugu H ; Kortidis, I ; Nkosi, SS ; Malgas, GF ; Mwakikunga, Bonex W ; Ray, Suprakas S ; Kiriakidis, G Date: Aug 2013 We report on the synthesis of ZnO films by aerosol spray pyrolysis method at different deposition times.The surface morphology, crystal structure and the cross-sectional analysis of the prepared ZnO filmswere characterized by X-ray diffraction ... Read more
Synthesis and characterization of potential iron–platinum drugs and supplements by laser liquid photolysis

Author: Nkosi, SS ; Mwakikunga, Bonex W ; Sideras-Haddad, E ; Forbes, A Date: Jun 2013 Highly crystalline nanospherical iron–platinum systems were produced by 248 nm laser irradiation of a liquid precursor at different laser fluences, ranging from 100–375 mJ/cm2. The influence of laser intensity on particle size, iron composition, ... Read more
Temperature-dependence on the structural, optical, and paramagnetic properties of ZnO nanostructures

Author: Mhlongo, Gugu H ; Motaung, DE ; Nkosi, SS ; Swart, HC ; Malgas, GF ; Hillie, KT ; Mwakikunga, Bonex W Date: Feb 2014 Violet-blue emitting ZnO nanostructures were synthesized by a microwave-assisted hydrothermal method followed by post-synthesis annealing at different temperatures. Scanning electron microscope analysis revealed a morphological transformation ... Read more

Now showing items 1-17 of 17

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Copyright © CSIR 2017. All Rights Reserved

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.