Dr. Suzanne Smith Profile

Dr. Suzanne Smith

at Council for Scientific and Industrial Research

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Author

Publications (9)

Proceedings Article | 28 January 2019 Paper

Inductor design for inkjet-printed electronics

Phillip Le Grange, Suzanne Smith, Trudi-Heleen Joubert

Proceedings Volume 11043, 110430L (2019) https://doi.org/10.1117/12.2502526

KEYWORDS: Inductance, Resistance, Magnetism, Capacitance, Printing, Electronics, Silver, Linear filtering, Atmospheric modeling, Nanoparticles

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Proceedings Article | 24 January 2019 Paper

Colorimetric system for paper-based assays

Demetre Liakos, Suzanne Smith, Trudi-Heleen Joubert

Proceedings Volume 11043, 110430J (2019) https://doi.org/10.1117/12.2502538

KEYWORDS: Image processing, Field programmable gate arrays, RGB color model, Image sensors, Light sources and illumination, Sensors, Binary data, Image segmentation, Colorimetry, Calibration

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Proceedings Article | 24 January 2019 Paper

Development of a printed paper-based origami electrochemical sensor for the detection of heavy metals in water

Phophi Madzivhandila, Suzanne Smith, Letta Ntuli, Kevin Land

Proceedings Volume 11043, 110430H (2019) https://doi.org/10.1117/12.2322333

KEYWORDS: Sensors, Chromatography, Metals, Lead, Printing, Cadmium, Microfluidics, Computer aided design, Water, Ions

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Proceedings Article | 24 January 2019 Paper

Printed, flexible wireless temperature logging system

Suzanne Smith, Phophi Madzivhandila, Adelaide Oberholzer, Kevin Land, Jan Korvink, Dario Mager

Proceedings Volume 11043, 110430I (2019) https://doi.org/10.1117/12.2500747

KEYWORDS: Printing, Antennas, Sensors, Temperature metrology, Adhesives, Electronics, Manufacturing, Environmental monitoring, Silver

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Proceedings Article | 3 February 2017 Paper

Development of paper-based wireless communication modules for point-of-care diagnostic applications

Suzanne Smith, Petroné Bezuidenhout, Kevin Land, Jan Korvink, Dario Mager

Proceedings Volume 10036, 100360J (2017) https://doi.org/10.1117/12.2244296

KEYWORDS: Diagnostics, Microfluidics, Point-of-care devices, Wireless communications, Sensors, Antennas, Electronic circuits, Printing, Computer aided design, Silver

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Proceedings Article | 3 February 2017 Paper

Development of paper-based electrochemical sensors for water quality monitoring

Suzanne Smith, Petroné Bezuidenhout, Mesuli Mbanjwa, Haitao Zheng, Mariette Conning, Nithyadharseni Palaniyandy, Kenneth Ozoemena, Kevin Land

Proceedings Volume 10036, 100360C (2017) https://doi.org/10.1117/12.2244290

KEYWORDS: Sensors, Water, Printing, Manufacturing, Inkjet technology, Metals, Electrodes, Silver, Carbon, Design for manufacturability

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Proceedings Article | 18 March 2016 Presentation + Paper

Blister pouches for effective reagent storage and release for low cost point-of-care diagnostic applications

Suzanne Smith, Rene Sewart, Kevin Land, Pieter Roux, Claudia Gärtner, Holger Becker

Proceedings Volume 9705, 97050F (2016) https://doi.org/10.1117/12.2217963

KEYWORDS: Microfluidics, Blood, Liquids, Point-of-care devices, Diagnostics, Lab on a chip, Manufacturing, Image processing, Crystals, BioMEMS, Actuators, Interfaces, Polymers, Statistical analysis

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Proceedings Article | 9 March 2015 Paper

Sample to answer visualization pipeline for low-cost point-of-care blood cell counting

Suzanne Smith, Thegaran Naidoo, Emlyn Davies, Louis Fourie, Zandile Nxumalo, Hein Swart, Philip Marais, Kevin Land, Pieter Roux

Proceedings Volume 9332, 93320V (2015) https://doi.org/10.1117/12.2076751

KEYWORDS: Blood, Microfluidics, Visualization, Point-of-care devices, Statistical analysis, Microscopy, Visual analytics, Video processing, Video, Microscopes

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Proceedings Article | 23 June 2014 Paper

Analysis system for characterisation of simple, low-cost microfluidic components

Suzanne Smith, Thegaran Naidoo, Zandile Nxumalo, Kevin Land, Emlyn Davies, Louis Fourie, Philip Marais, Pieter Roux

Proceedings Volume 9257, 92570J (2014) https://doi.org/10.1117/12.2065110

KEYWORDS: Blood, Microfluidics, Visualization, Actuators, Point-of-care devices, Statistical analysis, Microscopy, Image visualization, Imaging systems, Diagnostics

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There is an inherent trade-off between cost and operational integrity of microfluidic components, especially when intended for use in point-of-care devices. We present an analysis system developed to characterise microfluidic components for performing blood cell counting, enabling the balance between function and cost to be established quantitatively. Microfluidic components for sample and reagent introduction, mixing and dispensing of fluids were investigated. A simple inlet port plugging mechanism is used to introduce and dispense a sample of blood, while a reagent is released into the microfluidic system through compression and bursting of a blister pack. Mixing and dispensing of the sample and reagent are facilitated via air actuation. For these microfluidic components to be implemented successfully, a number of aspects need to be characterised for development of an integrated point-of-care device design. The functional components were measured using a microfluidic component analysis system established in-house. Experiments were carried out to determine: 1. the force and speed requirements for sample inlet port plugging and blister pack compression and release using two linear actuators and load cells for plugging the inlet port, compressing the blister pack, and subsequently measuring the resulting forces exerted, 2. the accuracy and repeatability of total volumes of sample and reagent dispensed, and 3. the degree of mixing and dispensing uniformity of the sample and reagent for cell counting analysis. A programmable syringe pump was used for air actuation to facilitate mixing and dispensing of the sample and reagent. Two high speed cameras formed part of the analysis system and allowed for visualisation of the fluidic operations within the microfluidic device. Additional quantitative measures such as microscopy were also used to assess mixing and dilution accuracy, as well as uniformity of fluid dispensing - all of which are important requirements towards the successful implementation of a blood cell counting system.

Showing 5 of 9 publications

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