title: Growth and optical properties of silver nanostructures obtained on connected anodic aluminum oxide templates.
abstract: Ag nanostructures are grown by AC electrodeposition on anodic alumina oxide (AAO) connected membranes acting as templates. Depending on the thickness of the template and on the voltage applied during the growth process, different Ag nanostructures with different optical properties are obtained. When AAO membranes about 1 μm thick are used, the Ag nanostructures consist in Ag nanorods, at the bottom of the pores, and Ag nanotubes departing from the nanorods and filling the pores almost for the whole length. When AAO membranes about 3 μm thick are used, the nanostructures are Ag spheroids, at the bottom of the pores, and Ag nanowires that do not reach the upper part of the alumina pores. The samples are characterized by angle resolved x-ray photoelectron spectroscopy, scanning electron microscopy and UV-vis and Raman spectroscopies. A simple NaOH etching procedure, followed by sonication in ethanol, allows one to obtain an exposed ordered array of Ag nanorods, suitable for surface-enhanced Raman spectroscopy, while in the other case (3 μm thick AAO membranes) the sample can be used in localized surface plasmon resonance sensing.
authors: Department of Chemical Sciences and INSTM Research Unit, University of Padova, Via Marzolo, 1, 35131 Padova, Italy.
authors: G
authors: G
authors: Giallongo
authors: C
authors: C
authors: Durante
authors: R
authors: R
authors: Pilot
authors: D
authors: D
authors: Garoli
authors: R
authors: R
authors: Bozio
authors: F
authors: F
authors: Romanato
authors: A
authors: A
authors: Gennaro
authors: G A
authors: GA
authors: Rizzi
authors: G
authors: G
authors: Granozzi