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Platinum Nano-Forest
Jason Kawasaki '09 (undergraduate) and Craig Arnold (faculty)
Department of Mechanical and Aerospace Engineering and the Princeton Institute for the Science and Technology of Materials (PRISM)
These platinum dendrites were grown via directed electrochemical nanowire assembly (DENA). In the DENA technique, an alternating electric field applied across a salt solution induces the crystallization of metal dendrites. The tree-like structure arises from self-assembly, in which growth along certain crystallographic directions occurs faster than others. The diameter of the main dendrite stem is 500 nanometers.