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A heart valve made of a nanocomposite material in a laboratory at University College London's (UCL) Department of Nanotechnology and Regenerative Medicine at the Royal Free Hospital, Hampstead. A polymer, created using nano technology and patented by University College London on behalf of Professor Alexander Seifalian, the heart valve is revolutionary due to its incredible bio-compatibility. The nano material maximizes surface area, making it the ideal place for cells to attach and successfully grow.