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Three people wearing lab safety glasses look at a small scientific device
Ryan Young/Cornell University Postdoctoral researcher Christopher Petroff (center), doctoral candidate Virginia McGhee (left), doctoral student Azriel Finsterer (right) and Lara Estroff, the Herbert Fisk Johnson Professor of Industrial Chemistry in Cornell Engineering (background), work on perovskites – a class of compound minerals that over the last decade have become the most exciting alternative to silicon.