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Mimicking Photosynthesis to Make Functional Nanostructures and Nanodevices

J.A. Shelnutt, Z. Wang, Y. Song, C.J. Medforth and E. Pereira
Sandia National Laboratories, US

Keywords:
porphyrin, nanotube, photocatalysis, platinum, gold, metallic, surfactant

Abstract:
Photocatalytic porphyrins are used to reduce metal complexes from aqueous solution and, further, to control the deposition of metals onto porphyrin nanotubes and surfactant assembly templates to produce metal composite nanostructures and nanodevices. For example, surfactant templates lead to spherical platinum dendrites and foam-like nanomaterials composed of dendritic platinum nanosheets. Porphyrin nanotubes are reported for the first time, and photocatalytic porphyrin nanotubes are shown to reduce metal complexes and deposit the metal selectively onto the inner or outer surface of the tubes, leading to nanotube-metal composite structures that are capable of hydrogen evolution and other nanodevices.

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