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Syntheses of Porous Self‐Supporting Metal‐Nanoparticle Assemblies with 3D Morphologies Inherited from Biosilica Templates (Diatom Frustules)
Author(s) -
Bao Zhihao,
Ernst Eric M.,
Yoo Sehoon,
Sandhage Kenneth H.
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200801499
Subject(s) - template , materials science , nanoparticle , dissolution , nanotechnology , silicon , porous silicon , porosity , metal , diatom , deposition (geology) , chemical engineering , morphology (biology) , metallurgy , composite material , paleontology , botany , sediment , engineering , biology , genetics
Porous 3D metal‐nanoparticle assemblies with selectable morphologies are synthesized. Biosilica templates (diatom frustules) are first converted into silicon replicas via magnesiothermic reduction. Electroless metal deposition, followed by silicon dissolution, then yields metal‐nanoparticle assemblies with the 3D template morphology (figure reveals a silver assembly; inset images reveal internal features after partial ion milling and EDX analysis).