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Willie is an electronic engineer with 37 years of academic experience at Stellenbosch University, retiring in December 2018. He currently leads the multidisciplinary Sensor Applications & Nano-Devices (SAND) research group in the Department of Electrical & Electronic Engineering. The SAND research group focuses on nanotechnological biosensing devices, including piezoelectric sensors utilising ZnO nanowires to detect pathogens, impedimetric sensors for bacterial and viral infections, autophagy sensors, cancer screening sensors, paper-based biosensors, electro-chemical biosensors and microfluidic devices.

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