Papers by Author: Byung Teak Lee

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Authors: Veeramuthu Vaithianathan, Jung Ho Je, Byung Teak Lee, Sang Sub Kim
Abstract: Growth behavior of Mn-doped ZnO thin films (Zn1-xMnxO) onAl2O3 (0001) substrates by pulsed laser deposition was investigated as a function of Mn content (0.00≤x≤0.35) mainly using synchrotron x-ray diffraction. We found that a small amount of Mn doping (x=0.05) significantly improves the crystalline quality, and also leads to a singly oriented film. The superior epitaxial growth of the film with an optimum Mn content seems to be associated with its microstructural evolution.
Authors: N.J. Kim, S.Y. Lee, G.K. Lee, J.H. Moon, Byung Teak Lee
Abstract: Inductively coupled plasma reactive ion etching of Ge doped silica glasses and SiON was investigated, using C2F6- and NF3-based gas mixtures. Mesas with smooth surfaces and vertical sidewalls were obtained, with a maximum etch rate of about 310nm/min in the case of C2F6 RIE of Ge-SiO2 and 280 nm/min in the case of SiON. The NF3 plasma yielded slightly higher etch rate, although sloped sidewalls were obtained. Results of the X-ray photoelectron spectroscopy showed little contamination on the etched surfaces.
Authors: Chang Jun Yoo, Yeon A Shim, Jong Ha Moon, Sang Sub Kim, Byung Teak Lee, Jin Hyeok Kim
Authors: Jae-Kil Han, Sung Min Choi, Ik Hyun Oh, Fumio Saito, Byung Teak Lee
Abstract: TiO2(1-.ZrO2. (.=- 0.2, 0.4, 0.6 and 0.8) composite powders having a homogeneous distribution and nanocrystalline were successfully synthesized by sol-gel process using titanium iso-propoxide as precursor. The particle sizes of TiO2-ZrO2 powders calcined at 600°C were measured ranging from 10nm to 19nm by XRD and TEM. For the comparison of photocatalytic activity, TiO2-ZrO2 composite powders were tested in the degradation of phenol and the photoreduction of inorganic pollutants. The degradation of phenol increased with increase the content of anatase TiO2 phase.
Authors: Y.H. Seo, K.C. Kim, H.W. Shim, Kee Suk Nahm, Eun Kyung Suh, H.J. Lee, Y.G. Hwang, D.-K. Kim, Byung Teak Lee
Authors: K.H. Jung, Nam Ihn Cho, J.H. Lee, Shou Jie Yang, C.K. Kim, Byung Teak Lee, Kyung Hwa Rim, Nam Kyun Kim, Eun Dong Kim
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