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Browsing by Author "Land, Kevin J"

Now showing items 1-19 of 19

The characterisation and design improvement of a paper-based E.coli impedimetric sensor

Author: Bezuidenhout, Petrone H ; Kumar, Raju ; Wiederoder, M ; Schoeman, J ; Land, Kevin J ; Joubert, T-H Date: Feb 2017 This paper describes the development and optimisation of a paper-based E. coli impedimetric biosensor for water quality monitoring. Impedimetric biosensing is advantageous because it is a highly sensitive, label-free, real-time method for the ... Read more
Development of a printed paperbased origami electrochemical sensor for the detection of heavy metals in water

Author: Madzivhandila, Phophi ; Smith, Suzanne ; Ntuli, Letta ; Land, Kevin J Date: Oct 2018 This paper presents a printed paper-based origami electrochemical sensor for the detection of heavy metals in water. Heavy metal contamination in water has significant health risks and environmental complications. The detection is typically ... Read more
The effect of g-C3N4 materials on Pb(II) and Cd(II) detection using disposable screen-printed sensors

Author: Zheng, Haitao ; Ntuli, Letta ; Mbanjwa, Mesuli ; Palaniyandy, Nithyadharseni ; Smith, Suzanne ; Modibedi, Remegia M ; Land, Kevin J ; Mathe, Mahlanyane K Date: Dec 2018 The disposable electrochemical sensors were designed and fabricated onto a photo paper substrate in-house. We report a first case use of g-C3N4, which is an emerging material as the most stable carbon-like polymer, explored for application ... Read more
First advanced open labware workshop and rapid prototyping solutions for research challenges in Africa

Author: Smith, Suzanne ; Land, Kevin J ; Bezuidenhout, L ; Chagas, AM Date: Nov 2018 We report on a workshop based on open source principles to implement innovative solutions for laboratories and science applications in Africa. Specifically, 3D printed designs and electronic circuit designs implemented by different research ... Read more
Functional screen printed radio frequency identification tags on flexible substrates, facilitating low-cost and integrated point-of-care diagnostics

Author: Smith, Suzanne ; Oberholzer, Adelaide E ; Land, Kevin J ; Korvink, JG ; Mager, D Date: May 2018 This work explores the practical functionality of ultra-high frequency (UHF) radio frequency identification (RFID) tags screen printed onto various low-cost, flexible substrates. The need for integrated and automated low-cost point-of-care ... Read more
Integrating integrated circuit chips on paper substrates using inkjet printed electronics

Author: Bezuidenhout, Petrone H ; Land, Kevin J ; Joubert, T-H Date: Nov 2016 This paper investigates the integration of silicon and paper substrates using rapid prototyping inkjet printed electronics. Various Dimatix DMP-2831 material printer settings and adhesives are investigated. The aim is to robustly and effectively ... Read more
A low-cost potentiostat for point-of-need diagnostics

Author: Bezuidenhout, Petrone H ; Smith, Suzanne ; Land, Kevin J ; Joubert, T-H Date: Sep 2017 The work presented details the development of a lowcost potentiostat, with the aim of creating an ink-jet printed hybrid paper-based low-cost sensing system for rapid water quality monitoring. Potentiostats exhibit high sensitivities and can ... Read more
A low-power CMOS operational amplifier IC for a heterogeneous paper-based potentiostat

Author: Bezuidenhout, Petrone H ; Land, Kevin J ; Joubert, T-H Date: Sep 2016 Electrochemical biosensing is used to detect specific analytes in fluids, such as bacterial and chemical contaminants. A common implementation of an electrochemical readout is a potentiostat, which usually includes potentiometric, amperometric, ... Read more
Micro-incubator for bacterial biosensing applications

Author: Clasen, E ; Land, Kevin J ; Joubert, T-H Date: Sep 2016 The presence of Escherichia coli (E. coli) is a commonly used indicator micro-organism to determine whether water is safe for human consumption. This paper discusses the design of a micro-incubator that can be applied to concentrate bacteria ... Read more
Microfluidic cartridges for automated, point-of-care blood cell counting

Author: Smith, Suzanne ; Madzivhandila, Phophi ; Sewart, R ; Govender, Ureshnie ; Becker, H ; Roux, Pieter ; Land, Kevin J Date: Nov 2016 Disposable, low-cost microfluidic cartridges for automated blood cell counting applications are presented in this article. The need for point-of-care medical diagnostic tools is evident, particularly in low-resource and rural settings, and a ... Read more
A microfluidic device for rapid screening of E. coli O157:H7 based on IFAST and ATP bioluminescence assay for water analysis

Author: Ngamsom, B ; Truyts, Alma E ; Fourie, Louis J ; Kumar, Shavon ; Iles, A ; Moodley, Klariska ; Land, Kevin J ; Pamme, N ; Tarn, MD Date: Aug 2017 We present a simple microfluidic system for rapid screening of Escherichia coli (E. coli) O157:H7 employing the specificity of immunomagnetic separation (IMS) via immiscible filtration assisted by surface tension (IFAST), and the sensitivity ... Read more
Novel functionalities of hybrid paper-polymer centrifugal devices for assay performance enhancement

Author: Wiederoder, MS ; Smith, Suzanne ; Madzivhandila, Phophi ; Mager, D ; Moodley, Kavandren ; DeVoe, DL ; Land, Kevin J Date: Sep 2017 The presented work demonstrates novel functionalities of hybrid paper-polymer centrifugal devices for assay performance enhancement that leverage the advantages of both paper-based and centrifugal microfluidic platforms. The fluid flow is ... Read more
Paper-based Diagnostics: Current Status and Future Applications

Author: Land, Kevin J Date: 2019 This book explores the status of paper-based diagnostic solutions, or Microfluidics 2.0. The contributors explore: how paper-based tests can be widely distributed and utilized by semi-skilled personnel; how close to commercial applications ... Read more
The potential of paper-based diagnostics to meet the ASSURED criteria

Author: Smith, Suzanne ; Korvink, JG ; Mager, D ; Land, Kevin J Date: Oct 2018 Paper-based diagnostics have already revolutionized point-of-care approaches for health and environmental applications, by providing low-cost, disposable tools that can be utilized in remote settings. These devices typically consist of ... Read more
Printed paper–based electrochemical sensors for low-cost point-of-need applications

Author: Smith, Suzanne ; Madzivhandila, Phophi ; Ntuli, Letta ; Bezuidenhout, Petrone H ; Zheng, Haitao ; Land, Kevin J Date: Feb 2019 Paper-based microfluidics is a rapidly developing field with applications for point-of-care disease and environmental diagnostics. In parallel, printed electronics has grown swiftly, particularly for wearable technologies. By combining these ... Read more
Printed RFID tags on paper and flexible substrates towards low-cost connected sensor systems

Author: Smith, Suzanne ; Oberholzer, Adelaide E ; Land, Kevin J ; Korvink, JG ; Mager, D Date: Nov 2018 We present printed sensing radio frequency identification (RFID) tags on different paper and flexible substrates towards low-cost, automated connected sensor solutions. Combining the Internet of Things (IoT) with printed electronics and ... Read more
Printed wireless devices for low-cost, connected sensors for point-of-care applications

Author: Smith, Suzanne ; Bezuidenhout, Petrone H ; Land, Kevin J ; Korvink, JG ; Mager, D Date: Nov 2017 Resource-limited settings require point-of-care (POC) diagnostic solutions that can be rapidly manufactured at a low cost. These solutions require efficient ways to communicate data, and are therefore ideally suited to the internet of things ... Read more
Printed, flexible wireless temperature logging system

Author: Smith, Suzanne ; Madzivhandila, Phophi ; Oberholzer, Adelaide ; Land, Kevin J ; Korvink, JG ; Mager, D Date: Oct 2018 The internet of things (IoT) has resulted in accelerated development of intelligent and connected devices. Important modules include those for monitoring of environmental parameters and sensors for health diagnostic applications. Flexible, ... Read more
REASSURED diagnostics to inform disease control strategies, strengthen health systems and improve patient outcomes

Author: Land, Kevin J ; Boeras, DI ; Chen, X-S ; Ramsay, AR ; Peeling, RW Date: Dec 2018 Lack of access to quality diagnostics remains a major contributor to health burden in resource-limited settings. It has been more than 10 years since ASSURED (affordable, sensitive, specific, user-friendly, rapid, equipment-free, delivered) ... Read more

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