• Korean Architects
• /
• no.7 s.160
• /
• pp.50-52
• /
• 1982

• Korean Architects
• /
• no.11 s.117
• /
• pp.27-29
• /
• 1978

• Korean Architects
• /
• no.5 s.158
• /
• pp.49-53
• /
• 1982

• Korean Architects
• /
• no.10 s.199
• /
• pp.36-41
• /
• 1985

• Korean Architects
• /
• no.2 s.132
• /
• pp.25-38
• /
• 1980

• Korean Architects
• /
• no.4 s.98
• /
• pp.61-74
• /
• 1977

• Korean Architects
• /
• no.8 s.90
• /
• pp.29-42
• /
• 1976

• Proceedings of the Korean Vacuum Society Conference
• /
• 2009.08a
• /
• pp.119-119
• /
• 2009

• Korean Journal of Metals and Materials
• /
• v.50 no.1
• /
• pp.59-63
• /
• 2012

Studying the long-range ordering of nanopores on the anodic aluminum oxide (AAO) membranes under a hard anodization (HA) approach is crucial in producing well-aligned nanopores on the AAO membranes. Electro-polishing in a mixture of ethanol and perchloric acid for 5 min removed marks formed by rolling and produced flat surfaces on aluminum substrates. The AAO was formed by the first HA process, providing seeds for the subsequent production of uniform AAO nanopores. The second HA process carried out on the seeds produced well-aligned, uniform AAO nanopores. The AAO nanopores, varying in size and shape, were observed with voltages applied for HA. This study provides a route for controlling the size and shape of AAO nanopores by changing the applied voltages.

• Korean Journal of Metals and Materials
• /
• v.49 no.1
• /
• pp.79-84
• /
• 2011

Double-walled carbon nanotubes (DWCNTs) with high purity were produced by the catalytic decomposition of tetrahydrofuran (THF) using a Fe-Mo/MgO catalyst at $800^{\circ}C$. The as-synthesized DWCNTs typically have catalytic impurities and amorphous carbon, which were removed by a two-step purification process consisting of acid treatment and oxidation. In the acid treatment, metallic catalysts were removed in HCl at room temperature for 5 hr with magnetic stirring. Subsequently, the oxidation, using air at $380^{\circ}C$ for 5 hr in the a vertical-type furnace, was used to remove the amorphous carbon particles. The DWCNT suspension was prepared by dispersing the purified DWCNTs in the aqueous sodium dodecyl sulfate solution with horn-type sonication. This was then air-sprayed on ITO glass to fabricate DWCNT field emitters. The field emission properties of DWCNT films related to transmittance were studied. This study provides the possibility of the application of large-area transparent CNT field emission cathodes.