http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Park, Taehee,Sim, Kijo,Lee, Jongtaek,Yi, Whikun American Scientific Publishers 2012 Journal of Nanoscience and Nanotechnology Vol.12 No.7
<P>Single-walled carbon nanotubes (SWNTs) are known to have a p-type charge transfer character in the atmosphere. The energy state of SWNTs can be modulated by doping with either an electron donor or an acceptor. In this study, iodine molecules are chosen for intercalation to SWNTs to predict the charge transfer tendency between them. Field-effect transistors (FETs) using iodine intercalated SWNTs (I-SWNTs) are fabricated and their electronic properties are investigated to better understand the charge transfer between iodine and SWNTs by changing gate voltages. Under vacuum, I-SWNT FETs exhibit weak n-type character, indicating that electrons are transferred slightly from the iodine to the SWNTs. After exposure to O2 gas, n-type characters are reduced; however, they still retain their original type.</P>
Park, Hyunjune,Lee, Jongtaek,Park, Taehee,Lee, Sanghun,Yi, Whikun American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.2
<P>Cadmium sulfide (CdS) and cadmium selenide (CdSe) are sequentially assembled onto a nanocrystalline TiO2 film to create a quantum-dot (QD)-sensitized solar cell application by a successive ionic layer adsorption and reaction (SILAR) method. The results show that CdS and CdSe QDs have a complementary effect in the performance of light harvest of solar cell. Single-walled carbon nanotubes (SWNTs) are incorporated with a CdS/CdSe QDs solar cell by mixing them with TiC2 film to enhance electron transfer. SWNTs are also sprayed onto CdSe QDs (SWNTs onto CdSe) to apply p+ type properties of SWNTs. Absorbance is increased in a wide wavelength range. In particular, cells having the sprayed SWNTs onto the QDs show a clear increase in absorbance at a low wavelength region. The fill factor of CdS/CdSe QDs solar cell with SWNTs is higher than that without SWNTs, indicating the decrease in loss of electron from TiO2 to QDs. Short-circuit current in a QD-sensitized solar cell having SWNTs on CdSe shows maximum value. Photo-current conversion efficiency of cells is increased in both cell types containing SWNTs at 10~17% compared with pristine cells. We expect that solar cells using SWNTs will affect future energy technology and devices.</P>
Optical Properties and Field Emission of ZnO Nanorods Grown on p-Type Porous Si
Park, Taehee,Park, Eunkyung,Ahn, Juwon,Lee, Jungwoo,Lee, Jongtaek,Lee, Sang-Hwa,Kim, Jae-Yong,Yi, Whikun Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.6
N-type ZnO nanorods were grown on p-type porous silicon using a chemical bath deposition (CBD) method (p-n diode). The structure and geometry of the device were examined by field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) while the optoelectronic properties were investigated by UV/Vis absorption spectrometry as well as photoluminescence and electroluminescence measurements. The field emission (FE) properties of the device were also measured and its turn-on field and current at 6 $V/{\mu}m$ were determined. In principle, the growth of ZnO nanorods on porous siicon for optoelectronic applications is possible.
Optical Properties and Field Emission of ZnO Nanorods Grown on p-Type Porous Si
Taehee Park,박은경,안지원,Jung Woo Lee,Jongtaek Lee,이상화,김재용,이휘건 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.6
N-type ZnO nanorods were grown on p-type porous silicon using a chemical bath deposition (CBD) method (p-n diode). The structure and geometry of the device were examined by field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) while the optoelectronic properties were investigated by UV/Vis absorption spectrometry as well as photoluminescence and electroluminescence measurements. The field emission (FE) properties of the device were also measured and its turn-on field and current at 6 V/μm were determined. In principle, the growth of ZnO nanorods on porous siicon for optoelectronic applications is possible.
Kim, TaeHee,Kwon, Ye Eun,Park, Sun Min,Kim, Min Seok,Jeong, Young Hwan,Park, Se Yeong,Bae, Young-Soo,Cheong, Eun Ju,He, Yi-Chang,Gong, Chun,Gao, Wei,Kim, Hee Kyu,Ham, Yeon Ho,Kim, Jin-Kyu,Choi, Sun Eu Institute of Forest Science 2022 Journal of Forest Science Vol.38 No.3
Genus of Rhododendron has been used in traditional medicine since ancient times and is known to be effective in immune function, inflammation, and cold symptoms. And the reason for this activity is the flavanonol type among flavonoids in the genus of Rhododendron. Among the flavanonol types, Taxifolin-3-O-arabinopyranoside was isolated from the root of native R. mucronulatum in Korea, and the structure was finally identified through HPLC, LC-MS/MS, <sup>1</sup>H-NMR, and <sup>13</sup>C-NMR. Taxifolin-3-O-arabinopyranoside is a compound mainly found in R. mucronulatum, a representative species of the genus of Rhododendron, and exhibits antioxidant, anti-inflammatory, and anti-atopic activities. In this study, Taxifolin-3-O-arabinopyranoside was chemotaxonomic significant in 5 species of the genus Rhododendron native to Korea (R. mucronulatum, R. mucronulatum var. ciliatum, R. schlippenbachii, R. yedoense var. Poukhanense, R. japonicum for. Flavum). Compared with the existing literature, Taxifolin-3-O-arabinopyranoside was identified for the first time in 4 species of Rhododendron except for the R. mucronulatum.
Seasonal Variations in Leaf Area Index at the Gwangneung Forest Catchment
Sungbin Park,Minseok Kang,Jong-Hwan Lim,Jung-Hwa Chun,Seunghwan Park,Youngill Kim,Taehee Hwang,Namyi Chae,Taejin Choi,Shinkyu Kang,Hyunwoo Kim,Sang-Ki Moon,Renmin Yuan,Jaeil Yoo,Joon Kim 한국기상학회 2007 한국기상학회 학술대회 논문집 Vol.2007 No.-
연료극 지지체형 SOFC를 이용한 중ㆍ저온용 스택 및 발전시스템 개발
이태희(Taehee Lee),최진혁(Jin Hyeok Choi),박태성(Tae-Sung Park),유영성(Young-Sung Yoo),박진우(Jin-Woo Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
KEPRI has studied anode-supported planar SOFCs and ㎾ class stacks operated at intermediate temperature for development of a combined heat and power unit. A single cell composed of Ni-YSZ/FL/ScSZ/LSCF showed the maximum power density of 0.55 W/㎠ at 650℃ and 1.8 W/㎠ at 750℃. With 37 cells of 10×10㎠ and stainless steel interconnects, a 1㎾ class SOFC stack was manufactured. When a 1㎾ class SOFC system was operated at 750℃ with city gas, it showed the power output of 1.3 ㎾e at 50 A. It also recuperated heat of 0.57-1.2 ㎾th according to the loaded current through combustion of unreacted anode off-gas. Recently, KEPRI is developing a new ㎾ class SOFC stack and system to increase efficiency and durability at intermediate temperature.