Home About us Contact
|
Home About us Contact | ||
|
|
||
Nanoporous Templates (nanoporou + templates)
Selected AbstractsPerfectly Ordered, Free-Standing Nanowire Arrays With Controllable Geometry,ADVANCED ENGINEERING MATERIALS, Issue 11 2009Adam Philip Robinson We demonstrate a novel focused ion beam (FIB) based technique for the production of substrate-supported, free-standing, perfectly ordered nanowire arrays with control over the pore geometry, pitch, diameter, and length. A FIB may be used to influence the site of pore formation in ultra-thin (<1 µm) oxide nanoporous templates adhered to substrates. Electrodeposition through the template results in the production of nanowire arrays with controlled, perfect ordering. [source] Arrays of Inorganic Nanodots and Nanowires Using Nanotemplates Based on Switchable Block Copolymer Supramolecular AssembliesADVANCED FUNCTIONAL MATERIALS, Issue 17 2009Bhanu Nandan Abstract Here, a novel and simple route to fabricate highly dense arrays of palladium nanodots and nanowires with sub-30,nm periodicity using nanoporous templates fabricated from supramolecular assemblies of a block copolymer, polystyrene- block -poly(4-vinylpyridine) (PS- b -P4VP) and a low molecular weight additive, 2-(4,-hydroxybenzeneazo) benzoic acid (HABA) is demonstrated. The palladium nanoparticles, which are directly deposited in the nanoporous templates from an aqueous solution, selectively migrate in the pores mainly due to their preferential attraction to the P4VP block covering the pore wall. The polymer template is then removed by oxygen plasma etching or pyrolysis in air resulting in palladium nanostructures whose large scale morphology mirrors that of the original template. The method adopted in this work is general and versatile so that it could easily be extended for patterning a variety of metallic materials into dot and wire arrays. [source] Light-Emitting Rubrene Nanowire Arrays: A Comparison with Rubrene Single CrystalsADVANCED FUNCTIONAL MATERIALS, Issue 5 2009Jin Woo Lee Abstract This is a report on a new method of growth of a light-emitting rubrene nanowires array with diameters of 200,±,10,nm by using organic vapor transport through Al2O3 nanoporous templates. Nanometer-scale laser confocal microscope (LCM) photoluminescence (PL) spectra and crystalline structures of the rubrene nanowires are compared with those of rubrene single crystals prepared with the same experimental conditions without the template. In the LCM PL spectra it is observed that the PL spectra and intensity varies with the detecting positions because of the crystal growth characteristics of the rubrene molecules. A single rubrene nanowire has a wider LCM PL band width than that of the rubrene single crystal. This may originate from the light emissions of the mixed polarized bands due to additional new crystallinity in the formation of the nanowires. From the current,voltage characteristic curves, the semiconducting nature of both the rubrene nanowires and single crystals is observed. [source] High Aspect-Ratio Cylindrical Nanopore Arrays and Their Use for Templating Titania Nanoposts,ADVANCED MATERIALS, Issue 4 2008O.-H. Park Well-defined arrays of titania nanoposts are generated by using high aspect-ratio cylindrical nanopore templates. The simple and controllable fabrication scheme of the nanoporous templates makes them very attractive for creating well-defined nanostructures out of a variety of functional materials. The arrays of titania nanoposts can find a variety of applications such as photonic crystals, photocatalysts, and photovoltaics. [source] | ||||||||||