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Ko, Wonbae,Lee, Sang Hyo,Lee, Jun Seok,Hong, Jin Pyo American Scientific Publishers 2012 Journal of Nanoscience and Nanotechnology Vol.12 No.7
<P>We report the structural properties of the vertically-oriented ZnO nanorods fabricated on various ZnO seed layers with chemical solution deposition (CSD) technique. The ZnO nanorods were prepared using an aqueous solution with Zinc nitrate (Zn(NO3)2 x 6H2O, Aldrich) and hexamethylenetetramine (HMT, Aldrich) in a convection oven. A-plane sapphire substrates with a deposited ZnO thin film were placed upside down in a quartz holder to avoid any micro-crystalline contamination. Especially, our hydro-thermal syntheses are automatically processed on precision pump drive systems (Masterflex) to accurately control the pH of the aqueous solution. The [002] crystal orientation of the ZnO seed layer was observed by the X-ray diffraction pattern. Structural features of ZnO nanorods were systematically analyzed by scanning electron microscopy and tunneling electron microscopy, together with selective area electron diffraction patterns. Experimental observations clearly demonstrated the dependence of the growth direction of the ZnO nanorods on the crystal structures of the ZnO seed layers.</P>
Ko, WonBae,Lee, SangHyo,Myoung, NoSoung,Hong, JinPyo Royal Society of Chemistry 2016 Journal of Materials Chemistry C Vol. No.
<▼1><P>Herein, we address the ZnO SLNR p–n homojunctions as UV photodetectors <I>via</I> a multi-step solution based hydrothermal route. Li was selected for manipulation of conduction type in ZnO and p-type ZnO:Li SLNRs were systematically investigated for crystallographic and luminescence features.</P></▼1><▼2><P>One long-standing goal in the development of one-dimensional nanostructured electronic devices is to facilitate the ongoing trend of miniaturization so as to enable ultralow power operation. Zinc oxide (ZnO) nanostructures, which have a direct and wide bandgap, are a central component in numerous electronic and optoelectronic applications. Here, we address vertically stacked ZnO sheet-like nanorod (SLNR) p–n homojunctions composed of single-crystalline undoped (n-type) and Li-doped (p-type) ZnO SLNRs by a multi-step solution-based hydrothermal route. Precise control of the molar concentration represented one of the basic factors in ensuring that the p–n homojunctions possessed appropriate densities and suitable morphologies. An extensive analysis of the luminescence features was carried out in order to identify p-type conduction in the Li-doped ZnO SLNRs. In addition, the SLNR-based p–n homojunctions exhibited distinct electrical features that validated their potential use as ultraviolet photodetectors, thereby spurring progress in the development of practical optoelectronics.</P></▼2>
Na mole concentration dependence on optical p-type behaviors of Na-doped ZnO nanowires
Ko, Wonbae,Lee, Sanhyo,Baek, Gwangho,Hong, Jin Pyo Elsevier 2014 CURRENT APPLIED PHYSICS Vol.14 No.1
We report the structural and optical features of Na-doped ZnO nanowires as a function of Na mole concentration to demonstrate the p-type conduction of Na-doped ZnO nanowires. The samples are prepared on RF-sputtered ZnO seed layers by using a simple hydrothermal method with sodium nitrate, zinc nitrate, and hexamethylenetetramine (HMTA) in an aqueous solution at low temperature (<90 degrees C). At first, the crystal structure of the c-axis orientation was analyzed using X-ray diffraction patterns. These exhibited a slight shift to lower values of the diffraction angle with decreasing Na mole concentration. To further verify the p-type behaviors of Na-doped ZnO nanowires, cryo-photoluminescence was employed at temperatures ranging from 10 to 300 K, corresponding to the clear appearance of excitons bound to a deeper acceptor (A(D)(0)X) and its LO phonon replicas. (C) 2013 Elsevier B.V. All rights reserved.
A STUDY ON THE DEVELOPMENT OF MEASUREMENT TOOLS FOR EROTIC CAPITAL OF LUXURY BRANDS
Wonbae Pang,Eunju Ko 글로벌지식마케팅경영학회 2023 Global Marketing Conference Vol.2023 No.07
Recent studies have examined the correlation between erotic capital and luxury brands, which is essential to social success. However, limitations of such research have been noted due to the ambiguity of the concept and measurement of erotic capital. Therefore, in this study, we clarify the components of erotic capital and develop measurement tools to study the expansion of the base of luxury brands. To this end, a survey targeted 200 consumers who had purchased luxury brands within six months. The results of this study show that the attraction value of individuals and expected social success increases purchases of luxury products. This study suggests that marketers of luxury brands based on traditional values should reflect the concept of erotic capital for product planning, promotion, and marketing to expand the consumer base.
SOCIAL COMPARISON AND VIP MARKETING IN THE LUXURY INDUSTRY
Eunju Ko,Wonbae Pang,Rino Kim,Sue Ryung Chang 글로벌지식마케팅경영학회 2023 Global Marketing Conference Vol.2023 No.07
As the demand for luxury brands faces uprising trends in popularity, marketing strategies strive to fully encompass the shifting tides of the market. Especially, high-end customers, hereby VIPs, are heavily nurtured based on their high-spending nature. With the understanding of VIP sales behavior based on social comparison and the adequate use of VIP marketing programs, luxury brands can optimize their sales of luxury brands. However, scant research examines the simultaneous impact of social comparison and VIP marketing in the luxury industry.
Pang Wonbae,Ko Eunju,Cho Minjung 한국마케팅과학회 2024 마케팅과학연구 Vol.34 No.2
In today’s society, individuals invest considerable effort into enhancing their physical appearance for socioeconomic success. Despite significantly expanding the boundaries of luxury brands, there has been limited academic exploration into the analysis of luxury brand value from an erotic capital perspective. This study explores the effect of erotic capital on the consumption value and purchase intention of luxury brands. We surveyed 148 VIP customers of major luxury brands and ascertained key elements of erotic capital, notably finding that factors such as pleasure, beauty, and arousal positively influence consumer behavior. Additionally, we confirmed the moderating effects of age and VIP level. Our findings suggest that luxury brands should incorporate the concept of erotic capital into their designs and marketing strategies while maintaining their brand identity to effectively navigate rapidly changing market environments and expand their customer base.