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Browsing by Author "Simo, A"

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A classification and ranking system on the H2 gas sensing capabilities of nanomaterials based on proposed coefficients of sensor performance and sensor efficiency equations

Author: Mwakikunga, Bonex W ; Motshekga, S ; Sikhwivhilu, L ; Moodley, M ; Scriba, Manfred R ; Malgas, G ; Simo, A ; Maaza, M ; Ray, Suprakas S Date: Jul 2013 A coefficient of performance is defined based on the traditional definitions of response, S, of a chemoresistive sensing material to a specific gas from resistance–time data. The new definition not only considers the S(sub response) and S(sub ... Read more
One-Dimensional Vanadium Dioxide nanostructures for room temperature hydrogen sensors

Author: Simo, A ; Mwakikunga, Bonex W ; Maaza, M Date: Jun 2015 In relation to hydrogen (H2) economy in general and gas sensing in particular, an extensive set of one dimensional (1-D) nano-scaled oxide materials are being investigated as ideal candidates for potential gas sensing applications. This is ... Read more
Phase transition study in strongly correlated VO2 based sensing systems

Author: Simo, A ; Kaviyarasu, K ; Mwakikunga, Bonex W ; Madjoe, R ; Gibaud, A ; Maaza, M Date: Apr 2017 Intermediate phase monoclinic M2 was observed by inducing in situ X-ray thermo diffraction on VO2 (M) nanoplatelets. The solid-solid phase transition occurs at around 65 °C assisted with the percolative transition metal-insulator. The existence ... Read more
Submicronic VO2–PVP composites coatings for smart windows applications and solar heat management

Author: Madida, IG ; Simo, A ; Sone, B ; Maity, Arjun ; Kana Kana, JB ; Gibaud, A ; Merad, G ; Thema, FT ; Maaza, M Date: Sep 2014 Large surface and chemically stable thermochromic composite coatings consisting of IR active sub-micron VO(sub2) particles embedded in a passive polymeric host matrix of Polyvinylphenol were synthesized by dip and spin coating process. The ... Read more
VO2 nanostructures based chemiresistors for low power energy consumption hydrogen sensing

Author: Simo, A ; Mwakikunga, Bonex W ; Sone, BT ; Julies, B ; Madjoe, R ; Maaza, M Date: May 2014 Mott-type VO(sub2) oxide nanobelts are demonstrated to be effective hydrogen gas sensors at room temperature. These nanobelts, synthesized by hydrothermal process and exhibiting the VO(sub2) (A) crystallographic phase, display room temperature ... Read more

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Browsing by Author "Simo, A"

Browsing by Author "Simo, A"

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