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Ultrathin Anodic Aluminum Oxide Membranes for Production of Dense Sub-20 nm Nanoparticle Arrays

U. Malinovskis ; R. Poplausks ; I. Apsite ; R. Meija ; J. Prikulis ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; D. Erts
Journal of Physical Chemistry C (1932-7447). Vol. 118 (2014), 16, p. 8685-8690.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: POROUS ALUMINA, FILMS, FABRICATION



Denna post skapades 2014-06-23.
CPL Pubid: 199463

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Materialkemi
Materialteknik

Chalmers infrastruktur