A.H. Johnston

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About

A.H. Johnston is a crystallographer whose work bridges automation and solid-state chemistry, with a focus on controlling and predicting organic crystal forms. Their key research areas include high-throughput crystallisation, polymorphism, and the application of robotic systems to explore crystallisation space. Johnston’s most notable contribution is the development of an automated parallel crystallisation screen, demonstrated in their 2005 paper "Robotic adventures in crystallisation space," which systematically recrystallised the thiazide diuretic hydrochlorothiazide. This work, cited 8 times, was part of the collaborative UK Research project "Control and Prediction of the Organic Solid-State," showcasing a pioneering approach to automating the discovery of new crystal forms. While their citation count is modest, Johnston’s impact lies in advancing methodological innovation—their robotic platform laid groundwork for high-throughput screening in pharmaceutical solid-state research, enabling more efficient exploration of polymorphs and solvates. This achievement highlights a commitment to transforming crystallisation from a trial-and-error process into a systematic, data-driven science, making Johnston a key figure in the early adoption of automation for organic solid-state studies.