• Journal of the Korean Electrochemical Society
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• v.6 no.3
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• pp.208-211
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• 2003

We have investigated the dimensional and microstructural dependence of magnetic properties of CoP nano-wire arrays fabricated by electrodeposition on AAO(anodic aluminum oxide) templates with different-size nanopores. Our results indicate that the magnetic properties of nanowire arrays can be varied with their dimensions and microstructures. As for the CoP nanowire arrays with the diameter of 20nm, it was found to have the coercivity more than 2.6kOe due to the shape anisotropy and squareness(Mr/Ms) of $\~0.8$. The CoP nanowire arrays with the diameter of 200m, however, showed very different magnetic properties depending on the current densities. Nanowires fabricated at $5mA/cm^2$ had stronger tendency to have the preferred crystallographic orientation of (002) parallel to the nanowire than those fabricated at $35mA/cm^2$ These microstructural differences are the reason why CoP nanowire arrays prepared at different current densities exhibited different magnetic properties.

• Journal of the Korean Magnetics Society
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• v.14 no.4
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• pp.149-161
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• 2004

The fusion of nano technology and information technology is essential to sustain the present growth rate and to induce new industry in this ever-growing information age. Considering Korean industry whose competitiveness lies heavily on information related technologies, this field will be inevitable for future. Nano materials can be described as novel materials whose size of elemental structure has been engineered at the nanometer scale. Materials in the nanometer size range exhibit fundamentally new behavior, as their size falls below the critical length scale associated with any given property. " Bottom-up' techniques involve manipulating individual atoms and molecules. Bottom-up process usually implies controlled or directed self assembly of atoms and molecules into nano structures. It resembles more closely the processes of biology and chemistry, where atoms and molecules come together to create structures such as crystals or living cells. Nano scale sensors are included in the electronics area since the diverse sensing mechanisms are often housed on a semiconductor substrate and usually give rise to an electronic signal. The application of nano technology to the chemical sensors should allow improvements in functionality such as gas sensing. In this presentation, we will discuss about the nano scale information materials and devices fabricated by using the organic/inorganic nano templates.