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Browsing by Subject "Nanoparticles"

Now showing items 43-62 of 67

One-step synthesis and characterization of CoS-Nanoparticles decorated multi-walled carbon nanotubes

Author: Kesavan Pillai, Sreejarani ; Moloto, N ; Ray, SS Date: Feb 2009 The organization of metal or semiconductor nanoparticles like quantum dots (QDs) on carbon nanotubes (CNTs) is one good example motivated by the desire to combine the properties of two functional nanoscale materials to achieve a wider range ... Read more
Optical and morphological properties of ZnO- and TiO2-derived nanostructures synthesized via a microwave-assisted hydrothermal method

Author: Moloto, N ; Mpelane, S ; Sikhwivhilu, LM ; Ray, Suprakas S Date: 2012 A microwave-assisted hydrothermal method was used to synthesize ZnO and TiO2 nanostructures. The experimental results show that the method resulted in crystalline monodispersed ZnO nanorods that have pointed tips with hexagonal crystal phase. ... Read more
Optical Properties of Nanoparticles and Nanocomposites

Author: Kumbhakar, P ; Ray, Suprakas S ; Stepanov, AL Date: 2014 Semiconductor and metallic nanomaterials and nanocomposites possess interesting linear absorption, photoluminescence emission, and nonlinear optical properties. Nanomaterials having small particle sizes exhibit enhanced optical emission as ... Read more
Optimization of milling procedures for synthesizing nano-CaCO3 from Achatina fulica shell through mechanochemical techniques

Author: Gbadeyan, OJ ; Adali, S ; Bright, G ; Sithole, Bishop B ; Onwubu, S Date: Jul 2020 The possibility of obtaining calcium carbonate nanoparticles from Achatina fulica shell through mechanochemical synthesis to be used as a modifying filler for polymer materials has been studied. The process of obtaining calcium carbonate ... Read more
Permeation of PLGA nanoparticles across different in vitro models

Author: Nkabinde, LA ; Shoba-Zikhali, LN ; Semete-Makokotlela, Boitumelo ; Kalombo, Lonji ; Swai, HS ; Hayeshi, R ; Naicker, B ; Hillie, TK ; Hamman, JH Date: Jul 2012 Many drug delivery systems have indicated improvement in delivery of various drug molecules and among these biodegradable and biocompatible polymers such as poly(D,L-lactide-co-glycolide) (PLGA) have been shown to enhance intracellular uptake ... Read more
Polylactide-Based bionanocomposites: A promising class of hybrid materials

Author: Ray, Suprakas S Date: 2012 Polylactide (PLA) is the oldest and potentially one of the most interesting and useful biodegradable man-made polymers because of its renewable origin, controlled synthesis, good mechanical properties, and inherent biocompatibility. The ... Read more
Polymer nanocomposite processing, characterization, and applications 2013

Author: Mago, G ; Ray, Suprakas S ; Shofner, ML ; Wang, S ; Zhang, J Date: Feb 2014 Nanoparticles, such as carbon nanotubes, nanoclays, and graphenes, are widely used in the polymer nanocomposites to alter the chemical, mechanical, electrical, optical, and thermal properties. However, a number of critical issues need to be ... Read more
Preparation and surface functionalisation of poly(styrene maleimide) nanoparticles for bacterial detection

Author: Barnard, A ; Chetty, A ; Klumperman, B Date: Oct 2012 The intelligent management of South Africa’s scarce water resources is a key focus area for the CSIR. This work aims to develop a rapid method for the detection of microbial contamination in water to assist authorities in the prevention of ... Read more
Processing nanocomposites based on engineering polymers: Polyamides and polyimides

Author: Ojijo, Vincent O ; Ray, Suprakas S Date: Oct 2018 Although polymer nanocomposites (PNCs) are now a relatively well-established technology, nanoparticles (NPs) such as carbon nanotubes (CNTs) and graphene are opening up new application areas in engineering PNCs. Therefore, research and ... Read more
Rubber nanocomposites: Processing, structure–property relationships, applications, challenges, and future trends

Author: Salehiyan, Reza ; Ray, Suprakas S Date: Oct 2018 This chapter discusses the roles of different nanoparticle types such as clays, CNTs, and graphene-based materials in the rubber manufacturing processes. It is shown that nanoparticles not only reinforce rubber matrices, but they can also ... Read more
Samarium oxide as a radiotracer to evaluate the in vivo biodistribution of PLGA nanoparticles

Author: Mandiwana, V ; Kalombo, Lonji ; Venter, Karien ; Sathekge, M ; Grobler, A ; Zeevaart, JR Date: Sep 2015 Developing nanoparticulate delivery systems that will allow easy movement and localization of a drug to the target tissue and provide more controlled release of the drug in vivo is a challenge in nanomedicine. The aim of this study was to ... Read more
Single-dose monomeric HA subunit vaccine generates full protection from influenza challenge

Author: Mallajosyula, JK ; Hiatt, E ; Hume, S ; Johnson, A ; Jeevan, T ; Chikwamba, Rachel K ; Pogue, GP ; Bratcher ; Haydon, H ; Webby, RJ ; McCormick, AA Date: Mar 2014 Recombinant subunit vaccines are an efficient strategy to meet the demands of a possible influenza pandemic, because of rapid and scalable production. However, vaccines made from recombinant hemagglutinin (HA) subunit protein are often of low ... Read more
Sol-gel preparation and characterization of Er3+ doped TiO2 luminescent nanoparticles

Author: Talane, TE ; Mbule, PS ; Noto, LL ; Shingange, Katekani ; Mhlongo, Gugu H ; Mothudi, BM ; Dhlamini, MS Date: Dec 2018 The present paper reports on down-and up-conversion luminescence behaviour of sol-gel derived erbium doped titanium dioxide with anatase structure. Through combined structural, optical and electron microscope analysis, effective and influence ... Read more
Structural characterization of polymer nanocomposites

Author: Sinha Ray, J ; Sinha Ray, Suprakash Date: Feb 2018 The performance of a heterogeneous material, such as polymer nanocomposites (PNCs) is dictated by three main factors: (i) the inherent properties of the components; (ii) interfacial interactions; and (iii) structure of the PNCs. The structure ... Read more
Synthesis and characterization of alginate beads encapsulated zinc oxide nanoparticles for bacteria disinfection in water

Author: Motshekga, Sarah C ; Ray, Suprakas S ; Maity, Arjun Date: Feb 2018 The use of polymer nanocomposites as novel materials for water remediation has emerged as a promising alternative for disinfection of bacteria contaminated water. Sodium alginate, a natural biopolymer has been investigated in this study by ... 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
Synthesis of nanomaterials by continuous-flow microfluidics: A review

Author: Makgwane, Peter R ; Ray, Suprakas S Date: Feb 2014 The development of controlled synthesis protocols of nanostructured materials with tailored particle size and shape has been a significant research area in nanoscience and nanotechnology. Much innovative research efforts had been focused on ... Read more
Synthesis of tungsten oxide nano structures by laser pyrolysis

Author: Mwakikunga, Bonex W ; Forbes, A ; Sideras-Haddad, E ; Erasmus, RM ; Katumba, G ; Masina, Bathusile N Date: 2008 Since the proposal to synthesise materials by laser assisted pyrolysis in the 1970s, and its practical realisation in 1982, a number of researchers have used this method in obtaining nano-powders from liquid droplets. This study revisits this ... Read more
TiO2 nanotube-based dye solar cell research in South Africa

Author: Cummings, F ; Le Roux, Lukas J ; Mutangwa, N ; Knoesen, D Date: Oct 2009 Vertically orientated titanium dioxide (TiO2) nanotubes hold great potential for application in dye-sensitized solar cells (DSCs) as they provide an unscathed, one-dimensional transport route for photo-generated charge carriers, thereby ... Read more
Topological investigation of electronic silicon nanoparticulate aggregates using ultra-small-angle X-ray scattering

Author: Jonah, EO ; Britton, DT ; Beaucage, P ; Rai, DK ; Beaucage, G ; Magunje, B ; Ilavsky, J ; Scriba, Manfred R ; Harting, M Date: Oct 2012 The network topology of two types of silicon nanoparticles, produced by high energy milling and pyrolysis of silane, in layers deposited from inks on permeable and impermeable substrates has been quantitatively characterized using ultra-small-angle ... Read more

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