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Nature Nanotechnology 3, 249 (1 May 2008) | doi:10.1038/nnano.2008.123

Top down bottom up: Ivy league

A phenomenon that interested Charles Darwin has led to bioengineers and chemists working together. Mingjun Zhang, a professor of bioengineering and robotics at the University of Tennessee, was playing with his son one afternoon when he noticed some ivy climbing over the fence in his backyard.