title: Stereoaligned epitaxial growth of single-crystalline platinum nanowires by chemical vapor transport.
abstract: Epitaxial Pt nanowire (NW) arrays are synthesized for the first time by a chemical vapor transport method by using a metal halide as a precursor. Here we report that the epitaxial growth direction of NWs can be steered by seed crystal morphology. Octahedral seeds grow into inclined NWs possessing six growth directions, whereas half-octahedral seeds grow into vertical and horizontal NWs. Interfacial energies between the seed material and the substrate are critical in determining the morphology of seed crystals. We also demonstrate that non-SERS-active Pt NWs can show strong surface-enhanced Raman scattering (SERS) spectra by placing them on Ag films. The active SERS observation would help to elucidate platinum-catalyzed chemical reactions.
authors: Department of Chemistry, KAIST, Daejeon 305-701, Korea.
authors: Youngdong
authors: Y
authors: Yoo
authors: Sol
authors: S
authors: Han
authors: Minjung
authors: M
authors: Kim
authors: Taejoon
authors: T
authors: Kang
authors: Juneho
authors: J
authors: In
authors: Bongsoo
authors: B
authors: Kim