Advanced Functional Materials
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Gold Nanostructures: Biologically-Enabled Syntheses of Freestanding Metallic Structures Possessing Subwavelength Pore Arrays for Extraordinary (Surface Plasmon-Mediated) Infrared Transmission (Adv. Funct. Mater. 12/2012)
The optical image shows a freestanding (silica-free) three-dimensional nanocrystalline gold replica of the valve of a Coscinodiscus asteromphalus (CA) diatom. On page 2550, Joseph W. Perry, Kenneth H. Sand-hage, and co-workers report the generation of such gold replicas via the use of a highly conformal and scalable wet chemical coating process. The quasiperiodic hexagonal hole pattern inherited from the native CA diatom valve enables the gold replica to exhibit plasmon-mediated extraordinary infrared transmission.