title: Core-shell and segmented polymer-metal composite nanostructures.
abstract: Composite nanostructures (approximately 200 nm wide and several micrometers long) of metal and polyaniline (PANI) in two new variations of core-shell (PANI-Au) and segmented (Au-PANI and Ni-Au-PANI) architectures were fabricated electrochemically within anodized aluminum oxide (AAO) membranes. Control over the structure of these composites (including the length of the gold shells in the core-shell structures) was accomplished by adjusting the time and rate of electrodeposition and the pH of the solution from which the materials were grown. Exposure of the core-shell structures to oxygen plasma removed the PANI and yielded aligned gold nanotubes. In the segmented structures, a self-assembled monolayer (SAM) of thioaniline nucleated the growth of PANI on top of metal nanorods and acted as an adhesion layer between the metal and PANI components.
authors.affiliation: Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Michal
authors.initials: M
authors.lastname: Lahav
authors.forename: Emily A
authors.initials: EA
authors.lastname: Weiss
authors.forename: Qiaobing
authors.initials: Q
authors.lastname: Xu
authors.forename: George M
authors.initials: GM
authors.lastname: Whitesides
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size
chemical_list: D000814:Aniline Compounds; D008670:Metals; C416807:polyaniline