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Browsing by Author "Malwela, T"

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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
Enzymatic degradation behavior of nanoclay reinforcedbiodegradable PLA/PBSA blend composites

Author: Malwela, T ; Ray, SS Date: Jun 2015 Films of a biodegradable PLA/PBSA blend and blend-composites containing 2 wt% of C20A, C30B and MEE were prepared by solvent casting and spin coating. The films were incubated in vials containing Tris–HCl buffer with Proteinase K, and their ... Read more
From phonon confinement to phonon splitting in flat single nanostructures: A case of VO2@V2O5 core–shell nano-ribbons

Author: Mwakikunga, Bonex W ; Maaza, M ; Hillie, KT ; Arendse, CJ ; Malwela, T ; Sideras-Haddadf, E Date: Jul 2012 Raman spectroscopy of the VOx nano-ribbons is discussed in the framework of the Richter (1981) equation for optical phononconfinement (a) as modified for thin films by Fauchet and Campbell (1986), (b) as presented by Kim and co-workers for ... Read more
The impact of nanoclay on the crystal growth kinetics and morphology of biodegradable poly(ethylene succinate) composite

Author: Bandyopadhyay, J ; Ray, SS ; Scriba, Manfred R ; Malwela, T Date: Jul 2012 The impact of nanoclay on the isothermal crystal growth kinetics and morphology of biodegradable poly(ethylene succinate) (PES) is reported. A PES composite (PESNC) containing 5 wt% organically modified montmorillonite, was prepared via solvent ... Read more
Investigating the crystal growth behavior of biodegradable polymer blend thin films using in situ atomic force microscopy

Author: Malwela, T ; Ray, Suprakas S Date: 2014 This article reports the crystal growth behavior of biodegradable polylactide (PLA)/poly[(butylene succinate)-co-adipate] (PBSA) blend thin films using atomic force microscopy (AFM). Currently, polymer thin films have received increased ... Read more
Investigation of the effects of substrate annealing on the properties of polymer blends

Author: Motaung, DE ; Malgas, GF ; Arendse, CJ ; Malwela, T Date: Jun 2010 The authors investigate the effect of substrate annealing prior to the deposition of the active layer on the morphological, structural and opto-electrical properties of two variations of organic polymer blends of poly (3-hexylthiophene):C60 ... Read more
Microstructural and photoluminescence properties of sol–gel derived Tb3+ doped ZnO nanocrystals

Author: Kabongo, GL ; Mhlongo, Gugu H ; Malwela, T ; Mothudi, BM ; Hillie, KT ; Dhlamini, MS Date: Apr 2014 Un-doped and Tb(Sup3+) doped ZnO nanocrystals with different concentrations of Tb(Sup3+) were synthesized by a sol–gel method and their photoluminescence (PL) properties were investigated. The successful incorporation of Tb(sup3+) ions with ... Read more
Role of organoclay in controlling the morphology and crystal-growth behavior of biodegradable polymer-blend thin films studied using atomic force microscopy

Author: Malwela, T ; Ray, Suprakas S Date: Sep 2014 This study reports the effect of organically modified nanoclay on the morphology and crystal growth behavior of biodegradable polylactide/poly[(butylene succinate)-co-adipate] (PLA/PBSA) blend thin films with the average thickness of 280 nm. ... Read more
Self-catalytic growth of tin oxide nanowires by chemical vapor deposition process

Author: Thabethe, BS ; Malgas, GF ; Motaung, DE ; Malwela, T ; Arendse, CJ Date: Jan 2013 The authors report on the synthesis of tin oxide (SnO(sub2)) nanowires by a chemical vapor deposition (CVD) process. Commercially bought SnO nanopowders were vaporized at 1050°C for 30 minutes with argon gas continuously passing through the ... Read more
Study of change in dispersion and orientation of clay platelets in a polymer nanocomposite during tensile test by variostage small-angle X-ray scattering

Author: Bandyopadhyay, J ; Malwela, T ; Ray, SS Date: Apr 2012 To understand the change in dispersion and orientation of clay platelets in three-dimensional space during tensile test, neat polymer and its nanocomposite samples were studied by small- and wide-angle X-ray scattering (SWAXS). The samples ... Read more
Study of morphology and crystal growth behaviour of nanoclay-containing biodegradable polymer blend thin films using atomic force microscopy

Author: Malwela, T ; Ray, SS Date: Apr 2012 Thin films of unmodified and nanoclay-modified polylactide/poly(butylene succinate) (PLA/PBS) blends were prepared on a glass substrate with a spin coater. The morphology and crystal growth behaviours for the films, crystallized at different ... Read more
Towards an electronic nose based on nano-structured transition metal oxides activated by a tuneable UV light source

Author: Mwakikunga, Bonex W ; Malwela, T ; Hillie, T ; Ndlovu, G Date: Oct 2011 Traditional gas sensors involve heating the sensor material for gas selectivity. New gas approaches require activation by a broadband UV light source. The authors propose to employ a tuneable UV source in which this source is tuned for its ... Read more
Unique morphology of dispersed clay particles in a polymer nanocomposite

Author: Malwela, T ; Ray, SS Date: Feb 2011 This communication reports a unique morphology of dispersed clay particles in a polymer nanocomposite. A nanocomposite of poly[butylene succinate)-co-adipate] (PBSA) with 3 wt% of organically modified montmorillonite was prepared by melt-blending ... Read more

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Browsing by Author "Malwela, T"

Browsing by Author "Malwela, T"

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