• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.577-578
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2012.10a
• /
• pp.579-580
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• 2012

• Journal of the Korean Ceramic Society
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• v.36 no.5
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• pp.521-530
• /
• 1999

• Proceedings of the Korean Ceranic Society Conference
• /
• 2002.10a
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• pp.196.1-196
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• 2002

• Proceedings of the Korean Ceranic Society Conference
• /
• 2003.10a
• /
• pp.45.2-45
• /
• 2003

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2011.06a
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• pp.1003-1004
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• 2011

• Solar Energy
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• v.16 no.2
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• pp.87-96
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• 1996

Electochromic tungsten oxide thin films were prepared on the ITO coated glass by rf magnetron sputtering from a compressed powder tungsten oxide target in an argonoxygen atmosphere. The influence of the preparation conditions, especially the substrate temperature, on the chemical stability of film was investigated. These films were cycled in 0.6M $LiClO_4$ and 0.6M $H_2SO_4$ electrolyte respecitively, and exhibited electrochromic behavior upon the electrochemical insertion and extraction of ion. Among these tungsten oxide thin films, films prepared at a substrate temperature of $150^{\circ}C$ were found to be most stable in terms of cyclic durability.

• Korean Chemical Engineering Research
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• v.49 no.1
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• pp.28-34
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• 2011

Titania nanotube(TNT), which is a tube shaped thin film manufactured by anodizing titanium under $F^-$ ion electrolyte, has photo activity. Distilled water and formamide were used as solvent, and HF, NaF, $NH_4F$ were used as main $F^-$ ions for the electrolyte. The length and the diameter of TNT increased as the voltage and anodizing time increased. TNT prepared by anodizing was a very ordered tube, and had a maximum length of 13.7 ${\mu}m$ depending on the conditions of manufacturing. Titania prepared by anodizing was amorphous, and became an anatase crystal after heat treatment.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.84.1-84.1
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• 2011

Typical solid oxide fuel cells (SOFCs) have limited applications because they operate at high temperature due to low ionic conductivity of electrolyte. Thin film solid oxide fuel cell with yttria stabilized zirconia (YSZ) electrolyte is developed to decrease operating temperature. Pt/YSZ/Pt thin film SOFC was fabricated on anodic aluminum oxide (AAO). The crystalline structure of YSZ electrolyte by sputter is heavily depends on the roughness of porous Pt layer, which results in pinholes. To deposit YSZ electrolyte without pinholes and electrical shortage, it is necessary to deposit smoother and denser layer between Pt anode layer and YSZ layer by sputter. Atomic Layer Deposition (ALD) technique is used to deposit pre-YSZ layer, and it improved electrolyte quality. 300nm thick Bi-layered YSZ electrolyte was successfully deposited without electrical shortage.

• Applied Chemistry for Engineering
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• v.10 no.5
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• pp.784-788
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• 1999

In this work, we analyzed the viscoelastic characteristics of electrochemically polymerized polypyrrole(PPy) thin film in various electrolyte solutions, $Na_2SO_4,\;Na_2CO_3$ and SDS + $NaClO_4$, using QCA. The characteristics of redox reaction of electrochemically polymerized PPy thin film for 180 sec in each electrolyte, was investigated in 0.1 M $NaClO_4$ electrolyte solution by cyclic voltammetry method. We used one side of quartz crystal electrode as a working electrode and measured the resonant frequency, resonant resistance and current as analytical parameters. As the results, we suggest that electrochemically polymerized PPy thin film in various electrolyte solutions shows tendency changing from elastic characteristics to viscoelastic one in the order of $ClO_4{^{-}}\;+\;DS^-,\;SO_4{^{-2}}$ and $CO_3{^{-2}}$.