title: Wet-chemical approaches to porous nanowires with linear, spiral, and meshy topologies.
abstract: We report universal approaches for porous nanowires (NWs), and porous NWs with spiral and meshy topologies that have been developed via anodic aluminum oxide (AAO) confined wet-chemical synthesis. Materials such as CuOx, Pd, and Cu NWs are taken as examples for porous NWs and porous NWs with spiral and meshy topologies. Immediate benefits are demonstrated in hydrogen sensors as examples. We observed that hydrogen concentrations as low as 0.2% (v/v) were detected, that critical temperatures of the reverse sensing behavior as low as 239.9 K were measured and that better baseline-stability was confirmed compared with those fabricated with pure Pd NWs. Our approaches are anticipated to work on the synthesis of the porous NWs of other materials that could be obtained via wet-chemistry with potential as candidates for the next generation nanodevices (e.g., gas sensors) and other applications (e.g., catalysts).
authors.affiliation: Department of Physics, University of Puerto Rico at Rio Piedras , San Juan, Puerto Rico 00931.
authors.forename: Dachi
authors.initials: D
authors.lastname: Yang
authors.forename: Luis F
authors.initials: LF
authors.lastname: Fonseca
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D005740:Gases / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry / Q000302:isolation & purification*; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology; D053770:Nanowires / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D016062:Porosity; D013499:Surface Properties
chemical_list: D005740:Gases; D010165:Palladium; D003300:Copper; D006859:Hydrogen; C000520:cuprous oxide