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Browsing by Subject "Nanotechnology"

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Bionanoscience landscape in South Africa and its implications in the development of a post-graduate curriculum - Presentation

Author: Sparrow, R Date: Nov 2009 Nanoscience is the study of phenomena to understand the effects, their influence on the properties and the manipulation of materials at the atomic, molecular and macro-molecular level. While nanotechnology is the design, production, ... Read more
Carbon-Nickel oxide nanocomposites: Preparation and charecterisation

Author: Tile, N ; Roro, Kittessa T ; Forbes, A Date: Jul 2011 Nanocomposite materials have wide range of applications in solar energy conversion. In this work, C-NiO nanocomposite coatings are prepared using sol-gel synthesis and deposited on aluminium substrates using a spin coater. The coatings are ... Read more
Chemical engineers, nanotechnology and future green economy

Author: Musee, N Date: Jan 2012 Nanotechnology is envisaged to address present human needs and secure living comforts of future generations cheaply, faster and more cleanly. To date, nanotechnology's impact on the economy and on our daily lives has been enormous. Read more
Conventional wet impregnation versus microwave-assisted synthesis of SnO2/CNT composites

Author: Motshekga, S ; Kesavan Pillai, Sreejarani ; Ray, SS Date: Mar 2011 Carbon nanotubes decorated with SnO2 nanoparticles were prepared by conventional and microwave-assisted wet impregnation. The composites were thoroughly characterized by X-ray diffraction, Raman spectroscopy, BET-surface area measurement, ... Read more
CSIR ScienceScope: Science and technology in support of small, medium and micro enterprises

Author: CSIR Date: 2017 The CSIR is committed to using its knowledge base to help improve the quality of life of all South Africans. One of the ways in which this can be achieved, is focusing on national priorities such as job creation, inclusive economic growth, ... Read more
Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD

Author: Oliphant, CJ ; Arendse, CJ ; Malgas, GF ; Motaung, DE ; Muller, TFG ; Knoesen, D Date: Oct 2009 This paper reports on the deposition of crystalline single-helix carbon microcoils, in the as-deposited state, by the hot-wire chemical vapor deposition process without any special preparation of nano-sized transition metal catalysts and ... Read more
An easy two-step microwave assisted synthesis of SnO2/CNT hybrids

Author: Motshekga, SC ; Kesavan Pillai, Sreejarani ; Ray, SS ; Jalama, K ; Krause, RWM Date: Nov 2011 Tin oxide (SnO2) - decorated carbon nanotube (CNT) heterostructures were synthesized by microwave assisted wet impregnation method. CNTs of three different aspect ratios were compared. The hybrid samples were characterized by powder X-ray ... Read more
Effect of heating temperature on the optical properties of sol-gel synthesized C/NiO nanocomposite thin films

Author: Roro, Kittessa T ; Tile, N ; Yalisi, B ; Forbes, A Date: May 2011 For efficient photo-thermal conversion of solar energy a spectrally selective solar absorber surfaces are widely used. An ideal selective surface should have a high absorptance (low reflectance) in the solar wavelength range (0.3 to 2.5 µm) ... Read more
Effect of precursor concentration, temperature and capping group on the morphology of CdS nanoparticles

Author: Moloto, N ; Revaprasadu, N ; Musetha, PL ; Moloto, MJ Date: 2008 A novel ligand to the synthesis of nanoparticles has been employed in this study. A Tetramethylthiuram disulphide cadmium complex (abundant in sulphur atoms) was used as a single-source precursor for the synthesis of CdS nanoparticles. The ... Read more
Effects of protein binding on the biodistribution of PEGylated PLGA nanoparticles post oral administration

Author: Semete, B ; Booysen, L ; Kalombo, Lonji ; Ramalapa, B ; Hayeshi, R ; Swai, HS Date: Mar 2012 The surface of nanoparticles is often functionalised with polymeric surfactants, in order to increase systemic circulation time. This has been investigated mainly for intravenously administered nanoparticles. This study aims to elucidate the ... Read more
Electrocatalytic optically modulated green prepared nanoparticles

Author: Fuku, Xolile G ; Modibedi, Remegia M Date: Dec 2019 Nanoscience has shown itself to be one of the most exciting areas in science, with experimental developments being driven by pressing demands for new technological applications. It is a highly multidisciplinary research field, and the ... Read more
Emerging boom in nano magnetic particle incorporated high-Tc superconducting materials and technologies - A South African perspective

Author: Srinivasu, VV Date: Jan 2009 With a strategy to establish and embrace the emerging nano particle incorporated superconductivity technology (based on the HTS materials and nano magnetic particles) in South Africa, the author has initiated the following research activity ... Read more
Emerging nanostructured materials for energy and environmental science

Author: Rajendran, S ; Naushad, M ; Raju, Kumar ; Boukherroub, R Date: 2019 This book provides the fundamental aspects of the diverse ranges of nanostructured materials (0D, 1D, 2D and 3D) for energy and environmental applications in a comprehensive manner written by specialists who are at the forefront of research ... Read more
Engineered inorganic nanoparticles and cosmetics: Facts, issues, knowledge gaps and challenges

Author: Wiechers, JW ; Musee, N Date: Oct 2010 The cosmetic industry is among the first adaptors of nanotechnology through the use of engineered nanoparticles (ENPs) to enhance the performance of their products and meet the customers’ needs. Recently, there have been increasing concerns ... Read more
Enhanced room temperature multiferroicity in Gd doped BFO

Author: Pradhan, SK ; Das, J ; Samantray, S ; Sahu, DR ; Pradhan, AK ; Zhang, K ; Konda, RB ; Mundle, R ; Srinivasu, VV ; Roul, BK Date: Jan 2009 A signature of enhanced multiferroic behavior at room temperature has been observed in Gd doped Bismuth Ferrite system. This paper reports the preliminary findings/observations of structural and magnetization measurement of bismuth rich iron ... Read more
Estimation of Titanium dioxide and Silver engineered nanoparticles environmental exposure risks in water: a case of Gauteng Province, South Africa

Author: Nota, N ; Musee, N ; Aldrich, C Date: 01 Sep 2010 Nanotechnology-based applications have dramatically increased in commercial and industrial applications1-3 (see Figures 1, 2 and 3). Also, the growth of nanotechnology-based consumer products (nanoproducts) in the global market is expected ... Read more
Evidence of free radical and antioxidant activity in Spirodela exposed to metallic and metal oxide nanoparticles: potential for protein and lipid damage

Author: Thwala, Melusi ; Musee, N ; Wepener, V ; Nota, N Date: Apr 2012 The toxicity of engineered nanoparticles towards macro algae and higher aquatic plants has not been well studied. This knowledge gap challenges the development of nano risk assessment towards water ecosystems. In this study, we investigated ... Read more
Fabrication of MWCNT/NiO nanocomposite thin films for optically selective solar absorbers

Author: Roro, Kittessa T Date: Jul 2011 This presentation explores solar thermal energy for harnessing solar energy for thermal energy (heat). Solar thermal collectors for water heating use a spectrally selective surface that absorb sunlight and convert it to heat. The presentation ... Read more
Fate, behaviour and toxicity of engineered nanomaterials in the environmental systems

Author: Musee, N Date: Apr 2012 Historical analysis of different technologies' evolution reveals how many of them failed to achieve the intended societal benefits. This is primarily because their associated health, safety, and environmental effects were detrimental to the ... Read more
Growth kinetics of nc-Si:H deposited at 200 °C by hot-wire chemical vapour deposition

Author: Oliphant, CJ ; Arendse, CJ ; Knoesen, D ; Muller, TFG ; Prins, S ; Malgas, GF Date: May 2011 The authors report on the growth kinetics of hydrogenated nanocrystalline silicon, with specific focus on the effects of the deposition time and hydrogen dilution on the nano-structural properties. The growth in the crystallite size, attributed ... Read more

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