Chul Min Kim
Korea University
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Publication
Featured researches published by Chul Min Kim.
Semiconductor Science and Technology | 2008
Shi Jong Leem; Young Chul Shin; Eun Hong Kim; Chul Min Kim; Byoung Gyu Lee; Youngboo Moon; In-Hwan Lee; Tae Geun Kim
We report the effect of different temperature profiles on the quality of the InGaN/GaN multiple quantum well (MQW) structures by employing photoluminescence (PL) and atomic force microscopy (AFM). We adopted a two-step varied-barrier-growth temperature method to improve the structural and optical properties of the InGaN/GaN MQW layers. The low-temperature GaN barrier layer was introduced to reduce the desorption rate of the indium atoms of the InGaN well, and then the high-temperature GaN barrier was grown to reduce the defects of InGaN/GaN MQWs. When the width of the low-temperature GaN barrier was 50 A and the high-temperature GaN barrier was grown at 1000 °C, the defect and surface roughness were significantly reduced, especially with a reduction in the depth of V-defect as low as 20 A.
Micromachines | 2017
Chul Min Kim; Gyu Tae Kim
We present a 1600 parallel microchamber microfluidic device for fast sample array preparation using the immiscibility of two liquids. The trapping efficiency and size of the arrayed sample in the microchambers of a parallel microfluidic device were analyzed at various flow rates. The trapping efficiency of the sample was also inspected according to the position of the microchamber. Samples were successfully arrayed using the device. The trapping efficiency of the sample was 98.69% at 1 mL/h. The trapping efficiency and diameter of the sample decreased as the flow rate increased. Trapping efficiencies also changed according to the position of the microchambers. As the distance of the microchambers from the inlet increased, the sample trapping efficiency decreased. This tendency occurred more clearly at higher flow rates.
Journal of Electroceramics | 2009
Young Chul Shin; Shi Jong Leem; Chul Min Kim; Su Jin Kim; Yun Mo Sung; Cheol Koo Hahn; Jong Hyeob Baek; Tae Geun Kim
Journal of the Korean Physical Society | 2009
Dong Ho Kim; Chul Min Kim; Eun Hong Kim; Young Chul Shin; Tae Geun Kim; Cheong Hyun Roh; Cheol Koo Hahn
Journal of the Korean Society for Precision Engineering | 2017
Chul Min Kim; Seo Jung Park; Gyu Man Kim
Journal of Nanoscience and Nanotechnology | 2017
Asad Ullah; Chul Min Kim; Gyu Man Kim
Applied Surface Science | 2017
Byung-Chul Lee; Chul Min Kim; Ho Kyun Jang; Jae Woo Lee; Min Kyu Joo; Gyu Tae Kim
Journal of the Korean Physical Society | 2009
Shi Jong Leem; Young Chul Shin; Eun Hong Kim; Chul Min Kim; Byoung Gyu Lee; Wan Ho Lee; Tae Geun Kim; Youngboo Moon
Archive | 2018
Asad Ullah; Chul Min Kim; Gyu Man Kim
Journal of the Korean Physical Society | 2018
Seong Ku Lee; Hyung Taek Kim; Il Woo Choi; Chul Min Kim; Chang Hee Nam