6533b7d7fe1ef96bd12678ac
RESEARCH PRODUCT
Ultrathin Anodic Aluminum Oxide Membranes for Production of Dense Sub-20 nm Nanoparticle Arrays
Donats ErtsUldis MalinovskisRaimonds PoplausksFloriana LombardiIndra ApsiteRaimonds MeijaJuris Prikulissubject
Materials scienceAnodizingOxideMembrane structureNanoparticleNanotechnologySulfuric acidElectrolyteSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsBarrier layerchemistry.chemical_compoundGeneral EnergyMembraneChemical engineeringchemistryPhysical and Theoretical Chemistrydescription
We present a systematic study of membrane structure (pore diameter and arrangement) in anodized aluminum oxide (AAO) layers obtained by anodization voltages 8-20 V in sulfuric and 15-40 V in oxalic acid electrolyte solutions. Anodization of bulk aluminum in sulfuric acid at 10 V potential was found to be optimal for production or ultrathin freestanding membranes with pore diameter in sub-20 nm range. The developed process with slow electrochemical reaction results in AAO membranes with thickness below 70 nm. The minimum required time for formation of continuous AAO membrane was determined and influence of electrolyte concentration on pore diameter in membrane after barrier layer removal analyzed. Finally, we demonstrate a method of membrane transfer onto a different surface and using it for masked deposition of dense nanoparticle arrays with diameters below 20 nm.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-04-09 | The Journal of Physical Chemistry C |