• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2008.05a
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• pp.305-308
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• 2008

In this paper, the magnetic domain states and recordability of the molded magnetic nanopillars were examined and analyzed by magnetic force microscopy (MFM) measurement. We focused on the some of the technical issues for MFM measurement regarding the lift height and geometry of the MFM tip. The effects of MFM tip shape and lift height on the MFM resolution were analyzed. Finally, we showed that the magnetic film on each molded nanopillars has a single magnetic domain state.

• Transactions of the Society of Information Storage Systems
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• v.3 no.3
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• pp.144-148
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• 2007

In this paper, we analyzed the effect of the pattern height on the readback signal characteristics of the magnetic nanopillar tops and trench bottoms. In addition, we discuss the applicability of the present method to the production of patterned magnetic media, which can be obtained by depositing magnetic thin films on the molded nanopillars with passive heating. We found that the individual magnetic island deposited on each molded nanopillars with passive heating is a single magnetic domain and confirmed that its magnetization can be successfully reversed by applying an external magnetic field.

• Proceedings of the Polymer Society of Korea Conference
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• 2006.10a
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• pp.31-32
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• 2006

We describe the preparation of nanostructured molecularly-imprinted surfaces using nanomolding on porous alumina. In molecular imprinting functional and cross-linking monomers are copolymerized in the presence of a molecular template, resulting in synthetic receptor materials. The drug propranolol and the dye fluorescein were used as the molecular imprinting templates. Binding studies with imprinted and non-imprinted surfaces revealed specific recognition of the templates and thus the existence of selective binding sites. In addition, the surface properties of the films were studied by water contact angle measurements. It was found that, depending on the monomers used, certain nanostructures induced great changes in the wetting properties of the surface.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.24 no.1
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• pp.38-42
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• 2015

Polydimethylsiloxane (PDMS) is a widely used material for replicating micro-structures because of its transparency, deformability, and easy fabrication. At the nanoscale, however, it is hard to fill a nanohole template with uncured PDMS. This paper introduces several simple methods by changing the surface energy of a nanohole template and PDMS elastomer for replicating 100nm-scale structures. In the case of template, pristine anodic aluminum oxide (AAO), hydrophobically treated AAO, and hydrophillically treated AAO are used. For the surface energy change of the PDMS elastomer, a hydrophilic additive and dilution solvent are added in the PDMS prepolymer. During the molding process, a simple casting method is used for all combinations of the treated template and modified PDMS. The nanostructured PDMS surface was investigated with a scanning electron microscope after the molding process for verification.