• Journal of the Korean Magnetic Resonance Society
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• v.15 no.1
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• pp.14-24
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• 2011

We have performed Liquid Chromatography-Solid Phase Extraction-NMR (LC-SPE-NMR) analysis for liquid crystalline mixture and elucidated the structures of selected components by NMR spectra. Combining the results of one-dimensional 1H experiments as well as homonuclear and heteronuclear two-dimensional experiments, we could analyze the molecular structure of the liquid crystal singles whose structure had not been interpretable by mass spectrometry alone.

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.65.3-65
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• 1998

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.41.3-41
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• 1998

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.134.2-134
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• 1998

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.41.4-41
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• 1998

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.815-818
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• 2002

Mn doped hexagonal phase of ZnS has been studied as a yellow-orange phosphor for the application to fluorescent displays operated at low voltages. It was found that luminescence from $Mn^{2+}$ was increased as the Mn concentration was increased up to1.2 mol% of host lattice. This study has been attempted by adding trivalent ions such as $Al^{3+}$ or $Bi^{3+}$ to ZnS:Mn as an agent to do the efficient incorporation of Mn ions into ZnS:Mn lattice, resulting in a significant improvement in the phosphor performance, especially at low voltages.

• Journal of the Korean institute of surface engineering
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• v.29 no.5
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• pp.437-442
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• 1996

High quality $YBa_2Cu_3O_y$(YBCO) thin films for directly coupled dc superconducting quantum interference device (SQUID) were fabricated by pulsed laser deposition. Several critical parameters have been optimized through systematic studies. Thus, the films showing the $T_c$ of above 91K and $J_c$ of above$2\times10^6A/cm^2$ at 77K were routinely obtained. Extensive AFM and X-ray diffraction studies have been conducted for morphological and structural analyses. The directly coupled DC-SQUIDs were fabricated from the YBCO thin films deposited on $SrTiO_3$ bicrystals under the optimized conditions. The measurement on $2I_c$ and swing voltage give 200$\mu$A and 17$\mu$V at 77K, respectively.

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1998.08a
• /
• pp.65.2-65
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• 1998

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.40.4-40
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• 1998

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.134.1-134
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• 1998