Nanotechnology advances and applications in information storage

A brief review of some applications of nanotechnology to information storage is given with the focus on self-assembled nanoporous alumina templates for patterned media.Ordered nanoporous alumina templates were fabricated by self-assembly technology. A two-step anodization process was also carried out to obtain templates with pores perpendicular to the substrate without removing the aluminum and barrier layer. Polycrystalline structure was observed with a grain size of about 2 μm in which the pores were almost perfect hexagonally ordered. The pore arrays exhibit different orientation along the boundaries of neighboring grains. Nanopatterning implemented by electron-beam lithography demonstrates the ability to write pores forming concentric circles with pore diameter as small as 50 nm.

[1]  Martin Moskovits,et al.  Magnetic properties of Fe deposited into anodic aluminum oxide pores as a function of particle size , 1991 .

[2]  F. Keller,et al.  Structural Features of Oxide Coatings on Aluminum , 1953 .

[3]  T. Xu,et al.  Magnetic nanowires in hexagonally ordered pores of alumina , 2000 .

[4]  Kenji Fukuda,et al.  Ordered Metal Nanohole Arrays Made by a Two-Step Replication of Honeycomb Structures of Anodic Alumina , 1995, Science.

[5]  Hideki Masuda,et al.  Fabrication of gold nanodot array using anodic porous alumina as an evaporation mask , 1996 .

[6]  Frank Müller,et al.  Self-organized formation of hexagonal pore arrays in anodic alumina , 1998 .

[7]  David B. Bogy,et al.  Nonlinear aspects of air-bearing modeling and dynamic spacing modulation in sub-5-nm air bearings for hard disk drives , 2003 .

[8]  R. Metzger,et al.  Cellular growth of highly ordered porous anodic films on aluminium , 1998 .

[9]  Kornelius Nielsch,et al.  Uniform Nickel Deposition into Ordered Alumina Pores by Pulsed Electrodeposition , 2000 .

[10]  Yiying Wu,et al.  Room-Temperature Ultraviolet Nanowire Nanolasers , 2001, Science.

[11]  T. Tamamura,et al.  Self-repair of ordered pattern of nanometer dimensions based on self-compensation properties of anodic porous alumina , 2001 .

[12]  S. Iwasaki,et al.  Magnetic discs using anodic oxidized aluminium substrates , 1987 .

[13]  Mark L. Schattenburg,et al.  Fabrication of patterned media for high density magnetic storage , 1999 .

[14]  S. Campbell.  The Science and Engineering of Microelectronic Fabrication , 2001 .

[15]  G. C. Wood,et al.  The morphology and mechanism of formation of porous anodic films on aluminium , 1970, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[16]  Porous cellular ceramic membranes: a stochastic model to describe the structure of an anodic oxide membrane , 1995 .

[17]  Sun,et al.  Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices , 2000, Science.

[18]  T. Tamamura,et al.  Square and Triangular Nanohole Array Architectures in Anodic Alumina , 2001 .

[19]  A. Datta,et al.  Ordered anodic alumina nanochannels on focused-ion-beam-prepatterned aluminum surfaces , 2001 .

[20]  Bo Cui,et al.  Large area high density quantized magnetic disks fabricated using nanoimprint lithography , 1998 .

[21]  Roger Wood,et al.  The feasibility of magnetic recording at 1 Terabit per square inch , 2000 .

[22]  H. Zeng,et al.  Magnetic properties of Ni nanowires in self-assembled arrays , 2000 .

[23]  Hsueh-Chia Chang,et al.  Nanoscale pore formation dynamics during aluminum anodization. , 2002, Chaos.

[24]  David B. Bogy,et al.  Direct algorithm and its application to slider air bearing surface optimization , 2002 .

[25]  W. Häberle,et al.  The "millipede" - nanotechnology entering data storage , 2002 .

[26]  U. Gösele,et al.  Polycrystalline and monocrystalline pore arrays with large interpore distance in anodic alumina , 1999 .