A.J. Walton

University of Edinburgh, National Microelectronics Institute

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About

Dr. A.J. Walton is a pioneer in microelectromechanical systems (MEMS), with a particular focus on bio-inspired robotics and microfluidic propulsion. His most celebrated contribution is the development of the first wireless-driven MEMS pond skater, a silicon-based swimming robot that mimics the water strider’s ability to float and move on liquid surfaces using surface tension. Leveraging electrowetting on dielectric (EWOD) technology, Walton demonstrated a compact 6×9 mm, 380 μm-thick device capable of controlled propulsion without onboard power, instead relying on a wireless driving mechanism. This breakthrough, detailed in his 2009 paper (23 citations), represents a significant advance in untethered micro-robotics and surface-tension-based locomotion. His earlier 2008 work laid the foundational principles of EWOD-driven movement for such devices. Though his citation counts are modest, Walton’s work is highly regarded for its novelty and engineering elegance, offering a proof-of-concept that has inspired further research into autonomous micro-swimmers and lab-on-a-chip systems. His achievements highlight the potential of merging MEMS fabrication with interfacial phenomena for next-generation robotic systems.