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Showing 1 to 13 of 13 for “"Anodic alumina"”.
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Engineering the Iontronic Properties of Nanoporous Anodic Alumina and Its Applications
… of iontronic systems based on nanoporous anodic alumina (NAA) by harnessing its intrinsic iontronic properties. The unique characteristics of this platform materials are finely tuned through structural engineering and chemical modification for specific applications, including sensing and …
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Growth of anodic alumina nanopores and titania nanotubes and their applications
Anodic aluminum oxide (AAO) nanopores are excellent templates to fabricate different nanostructures. However, the pores are limited to a hexagonal arrangement with a domain size of a few micrometers. In this dissertation, focused ion beam (FIB) is used to create pre-patterned concaves to guide the …
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Synthesis, Characterization and Properties of Nanostructured Materials by Template-Directed Method
… deposition method directed by the Anodic Alumina Membrane (AAO) as a template. A so called "polymer-free" method has been investigated to make striped nanowires with superlattice structure. Various methods have been used to characterize these nanomaterials, including SEM, FESEM TEM, …
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Nanowire Zinc Oxide MOSFET Pressure Sensor
… ultrahigh aspect ratio ZnO nanowire growth using anodic alumina oxide (AAO) templates. The pressure sensor has two main components: MOSFET and ZnO nanowires. Silicon Dioxide growth, photolithography, dopant diffusion, and aluminum metallization were used to fabricate a basic MOSFET. In the other …
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Nanopore/Nanotube Pattern Formation through Focused Ion Beam Guided Anodization
… shaped metals. In some specific conditions, anodic oxide layers exhibit interesting nanopore/nanotube structures. In this work, focused ion beam patterning method is introduced to general anodization, aiming to make highly ordered anodic porous alumina and titania nanotubes. Focused ion beam …
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Small angle scattering characterisation of micellar systems and templated architectures
… (PMOs) were synthesised within the channels of anodic alumina membranes (AAM) under different conditions, including drying rates and precursor concentrations. In-situ small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM) was used to determine the pore morphology of the …
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Bismuth nanowire and antidot array studies motivated by thermoelectricity
Porous anodic alumina (PAA) films were utilized to template the fabrication of nanostructures of bismuth, antimony and bismuth-antimony alloys. The cylindrical template pores were used to synthesize nanowires by electrochemical methods. The porous surface of the template was used as a substrate for …
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Thermoelectric properties of Bi₁âx̳Sbx̳ nanowires and lead salt superlattice nanowires
… into the hexagonally packed cylindrical pores of anodic alumina. These nanowires possess a very high crystalline quality with a diameter-dependent crystallographic orientation along the wire axis. A theoretical model for Bil-Sbx nanowires is developed, taking into consideration the effects of …
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Fabrication and Device Applications of Self Assembled Nanostructures
… within nanometer sized pores of an anodic alumina film, exhibit unusually large molecule-specific red- or blue-shifts in the fluorescence peak. This molecular specificity allows us to resolve different constituents in a mixture optically, providing a unique new technology for bio- …
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A nanostructured porous silicon based drug delivery device
… masking templates were investigated – a porous anodic alumina (PAA) and a metal mask with hexagonally arranged holes produced by a novel nanosphere lithography (NSL) technique. A quasi-ordered PAA template with pore diameters in the region of 50 nm was fabricated but was not suitable for the …
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Porous anodic aluminum oxide scaffolds; formation mechanisms and applications
Nanoporous anodic aluminium oxide (AAO) can be created with pores that self-assemble into ordered configurations. Nanostructured metal oxides have proven to be very useful as scaffolds for growth of nanowires and nanotubes with tunable diameters and with tight diameter distributions. For 50 years, …
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Příprava samoorganizovaných nanostrukturovaných oxidických vrstev
Na vzorcích čistého hliníku (99,95 Goodfellow) byly provedeny experimenty pro ověření různých anodizačních technik. Jako elektrolyt byl použit roztok kyseliny šťavelové, anodizační napětí dosahovalo hodnot od 20 V do 60 V, přičemž po celou dobu anodizace byl měřen průběh proudu. Prostřednictvím FEG …
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Sensing in biological systems
… report on improved sensitivity in a nanoporous anodic alumina (NAA) sensing platform, targeted towards the detection of analytes in biological media. Sensing on an NAA platform utilises reflectometric interference spectroscopy (RIFS), where the amount of light-based signal is proportional to the …