9 research outputs found

    Analysis of inhomogeneous deformation and recrystallization textures of aluminum sheet

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    ํ•™์œ„๋…ผ๋ฌธ(๋ฐ•์‚ฌ)--์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› :๊ธˆ์†๊ณตํ•™๊ณผ,1996.Docto

    ์—ด๋ฆฐ์ถฉ๋‚จ 12ํ˜ธ-[ํŠน์ง‘]์ถฉ์ฒญ๋‚จ๋„ ์ž์น˜ํ–‰์ •์˜ ํšจ๊ณผ์„ฑ ์ฆ๋Œ€๋ฐฉํ–ฅ

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    โ… . ์„œ๋ก  ํ–‰์ •์ด ์กด์žฌํ•˜๋Š” ๊ถ๊ทน์  ์ด์œ ๋Š” ์ฃผ๋ฏผ์—๊ฒŒ ์žˆ๋‹ค๋Š” ๋ช…์ œ๋Š” ํ–‰์ •์ด ์˜ค๋กœ์ง€ ์ฃผ๋ฏผ์„ ์œ„ํ•˜์—ฌ ์กด์žฌํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์„ฑ๋ฆฝํ•˜๋Š” ์ด์œ ๊ฐ€ ๋œ๋‹ค. ๋ชจ๋“  ํ–‰์ •ํ–‰์œ„์— ์žˆ์–ด์„œ ์ด๊ฒƒ์€ ๋ณธ์งˆ์ ์ธ ์„ ์˜(ๅ–„ๆ„)์ด๊ณ  ์ด ๋ณธ์งˆ์  ์„ ์˜์˜ ์‹คํ˜„์€ ๊ถ๊ทน์  ์ด๋…์˜ ๊ธฐ๋ฐ˜์ด ๋œ๋‹ค. ์ถฉ์ฒญ๋‚จ๋„ ์ž์น˜ํ–‰์ •์—์„œ์˜ ๋„๋ฏผ๋ด‰์‚ฌ๋Š” ๊ทธ ์ค‘์‹ฌ์  ์ด๋…์ด๋‹ค. ๋„๋ฏผ๋ด‰์‚ฌ์˜ ์ด๋…์€ ๋„๋ฏผ์˜ ์ž…์žฅ์—์„œ ๋„๋ฏผ์ด ๋ฐ”๋ผ๋Š” ๊ฐ€์น˜์™€ ์ด์ต์˜ ์‹คํ˜„์„ ๊ทธ ๋‚ด์šฉ์œผ๋กœ ์‚ผ๊ณ ์ž ํ•œ๋‹ค. -์ดํ›„ ์ƒ๋žต1. ์„œ๋ก  2. ์ž์น˜์‹œ๋Œ€์˜ ํšจ๊ณผ์„ฑ๊ณผ ๋ฏผ๋ณธํ–‰์ • 3. ์ž์น˜ํ–‰์ • ํšจ๊ณผ์„ฑ์˜ ๊ฐœ๋…์  ๋…ผ์˜ 4. ์ถฉ์ฒญ๋‚จ๋„ ์ง€๋ฐฉ์ž์น˜ํ–‰์ •์˜ ํšจ๊ณผ์„ฑ ์ฆ๋Œ€๋ฐฉํ–ฅ 5. ๊ฒฐ

    ๋‚˜๋…ธ ๊ตฌ์กฐ์ฒด ์‘์šฉ์„ ์œ„ํ•œ ๊ณ ์ƒ ๊ธˆ์† ๋ฐ•๋ง‰์˜ ํ”Œ๋ผ์ฆˆ๋งˆ ๋””์›จํŒ…

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    ํ•™์œ„๋…ผ๋ฌธ (๋ฐ•์‚ฌ)-- ์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› : ์žฌ๋ฃŒ๊ณตํ•™๋ถ€, 2016. 2. ์ด์ •์ค‘.an optimum condition is suggested in order to maximize the power conversion efficiency via the near-field effect. The Au-nanoparticle array is also used to enhance the efficiency of the system, by means of the photocatalytic activity. The photocatalytic activity of Au nanoparticles(NPs)/TiO2 was evaluated by determining the photo-degradation of methylene blue (MB) under ultraviolet (UV) or visible-light irradiation. In addition to the nanoparticle array, a bi-continuous Au nano-film is used in transparent conductive electrodes (TCE) that are essential for providing electrical contact and transmittance for solar cells and display devices. The sheet resistance (Rs) and optical transmittance (T), which are key parameters of TCE, are determined by the thickness of the Au film and the plasma treatment time, respectively. The plasma-induced dewetting method constitutes a simple, fast, and efficient process for the fabrication of continuous metal nanostructures for use in TCE.During solid-state dewetting, a physical phenomenon, thin films disintegrate into a set of droplets or particles at temperatures below the melting temperature. Plasma-induced dewetting, in contrast to thermal dewetting and pulsed-laser dewetting, is a rapid process that can be performed at low temperatures and over large-scaled areas. In addition, more uniform nanoparticle arrays can be fabricated (compared to those obtained via thermal dewetting) owing to the high density of holes nucleated during this process, which prevents the coarsening of nanoparticles. In this research, various metal nanoparticle arrays (Au, Ag, Cu) are fabricated using inductively coupled plasma and the mechanism of plasma-induced dewetting is discussed. The evolution of solid-state dewetting with plasma treatment time is examined. Furthermore, the open area of metallic films is calculated through image analysis of images obtained via field emission scanning electron microscopy (FE-SEM). The crystallographic evolution during dewetting is examined by using grazing-incidence small-angle X-ray scattering. Various parameters such as the film thickness, plasma treatment time, film density, and the interfacial energy between the film and the substrate are considered. The size, inter-particle spacing, and number of nanoparticles per unit-area are modified by varying these parameters. More importantly, a repeated dewetting process method that leads to significant changes in the nanoparticle array distribution is introduced. The nanoparticle array and bi-continuous nano-film fabricated by using the plasma-induced dewetting method are used for various applications such as organic solar cells, photocatalytic activity of TiO2, and transparent conductive electrodes materials. A Au-nanoparticle array on indium tin oxide (ITO) is used to improve the performance of organic solar cells via the plasmon-enhanced absorption effect. Moreover, the features of the array are varied in order to promote overlapping of the active layer absorption band and the Au nanoparticle plasmonic resonance frequencyI. INTRODUCTION 11 1.1 Plasma-induced Dewetting 11 1.2 Applications 14 1.2.1 Organic Solar Cells 14 1.2.2 Photocatalytic Activity 15 1.2.3 Transparent Conductive Electrodes 16 1.3 Research background and theory 19 II. EXPERIMENTAL 27 2.1 Deposition Method 27 2.1.1 Substrate 27 2.1.2 Deposition System 27 2.1.3 Deposition Process 28 2.2 Plasma Treatment 29 2.2.1 Plasma Treatment System 29 2.2.2 Plasma Treatment Process 30 2.3 Analysis Methods 30 2.3.1 Surface Morphology 30 2.3.2 Film Characterization 31 III. RESULTS AND DISCUSSION 38 3.1 Plasma- Induced Dewetting Process 38 3.2 Formation of Nanoparticle Array 53 3.3 Applications of Nanostructure 74 3.3.1 Organic solar cell 74 3.3.2 Photocatalytic Activity 80 3.3.3 Transparent Conductive Electrodes 85 IV. CONCLUSION 91 V. REFERENCES 93 โ…ฅ. ๊ตญ๋ฌธ์ดˆ๋ก 108Docto

    Generating an Optimal Auto Insurance Ratewith the Consideration of Population Change

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    ํ˜„์žฌ ๊ตญ๋‚ด ์ž๋™์ฐจ๋ณดํ—˜ํšŒ์‚ฌ๋“ค์€ ์ˆ˜์ง€์ƒ๋“ฑ ์ดํ•˜์˜ ์š”์œจ์„ ์ด์šฉํ•  ์ˆ˜๋ฐ–์— ์—†๋Š” ํ™˜๊ฒฝํ•˜์—์„œ ์„ธ๊ณ„์—์„œ ๊ฐ€์žฅ ๋น ๋ฅธ ์ธ๊ตฌ ๊ณ ๋ นํ™”์— ๋Œ€์‘ํ•ด์•ผ ํ•˜๋Š” ์–ด๋ ค์›€์— ์ง๋ฉดํ•ด ์žˆ๋‹ค. ์ผ๋ฐ˜์ ์œผ๋กœ ํƒ€ ์†ํ•ด๋ณดํ—˜ ์ข…๋ชฉ์˜ ๊ฒฝ์šฐ ์ถ”์„ธ๋ฅผ ๊ณ ๋ คํ•œ ์ˆ˜์ง€์ƒ๋“ฑ ์š”์œจ์„ ์ด์šฉํ•˜๋Š” ๊ฒƒ์ด ํ—ˆ์šฉ๋˜์–ด ์žˆ์œผ๋‚˜ ์ž๋™์ฐจ๋ณดํ—˜์˜ ๊ฒฝ์šฐ ๊ธˆ์œต๋‹น๊ตญ์˜ ๊ทœ์ œ์™€ ์น˜์—ดํ•œ ์‹œ์žฅ ๊ฒฝ์Ÿ์œผ๋กœ ์ธํ•ด ์ˆ˜์ง€์ƒ๋“ฑ ์ดํ•˜์˜ ์š”์œจ์ด ์ด์šฉ๋˜๊ณ  ์žˆ๊ณ  ์ž๋™์ฐจ๋ณดํ—˜ํšŒ์‚ฌ๋“ค์ด ์—ฐ๋ น๋ณ„ ์†ํ•ด์œจ ๋ณ€ํ™” ์ถ”์„ธ๋ฅผ ์š”์œจ ์‚ฐ์ถœ์— ๊ทธ๋Œ€๋กœ ์ ์šฉํ•˜๋Š” ๊ฒƒ์ด ํ˜„์‹ค์ ์œผ๋กœ ์–ด๋ ต๋‹ค. ๋ณธ ์—ฐ๊ตฌ๋Š” ์ด๋Ÿฌํ•œ ํ™˜๊ฒฝํ•˜์—์„œ ์ž๋™์ฐจ๋ณดํ—˜ํšŒ์‚ฌ๋“ค์ด ์ธ๊ตฌ๋ณ€ํ™”๋ฅผ ๊ณ ๋ คํ•ด ์ตœ์ ํ™”๋œ ์—ฐ๋ น๋Œ€๋ณ„ ์š”์œจ์„ ์‚ฐ์ถœํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์†Œ๊ฐœํ•œ๋‹ค. ์ด๋ฅผ ์œ„ํ•ด ๋จผ์ € ๋ณธ๊ณ ๋Š” ์ธ๊ตฌ ๋ณ€ํ™”๊ฐ€ ์—ฐ๋ น ๊ตฌ๊ฐ„๋ณ„ ์ž๋™์ฐจ๋ณดํ—˜ ์†ํ•ด์œจ์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ์ถ”์ •ํ•˜๊ณ  ์ž๋™์ฐจ๋ณดํ—˜ํšŒ์‚ฌ๊ฐ€ ๋ณดํ—˜๋ฃŒ๋ฅผ ์ œํ•œ์ ์œผ๋กœ ์ธ์ƒํ•˜๋Š” ๊ฒƒ์ด ํ—ˆ์šฉ๋œ ๊ฒฝ์šฐ ์ธ๊ตฌ๋ณ€ํ™”๋ฅผ ๊ณ ๋ คํ•ด ์ž๋™์ฐจ ๋ณดํ—˜์˜ ์˜์—…์†ํ•ด(์ด์ต)๋ฅผ ์ตœ์†Œํ™”(๊ทน๋Œ€ํ™”)ํ•˜๋Š” ์—ฐ๋ น๋Œ€๋ณ„ ์ž๋™์ฐจ๋ณดํ—˜ ์š”์œจ(์ƒ๋Œ€๋„)์„ ์ •ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์•ˆํ•œ๋‹ค.22Nkc

    ์—ด๋ฆฐ์ถฉ๋‚จ 12ํ˜ธ-[ํ†ตํ•ฉ๋ณธ]์—ด๋ฆฐ์ถฉ๋‚จ 12ํ˜ธ (1998, ์—ฌ๋ฆ„)

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    [ํŠน์ง‘]์ถฉ์ฒญ๋‚จ๋„ ๋ฏผ์„ ์ž์น˜๋„์ •์˜ ๋ฐœ์ „์ „๋žต ์ง€๋ฐฉ๋ฏผ์ฃผ์ฃผ์˜์˜ ๋ฐœ์ „๊ณผ ์ถฉ๋‚จ์˜ ์ž์น˜์—ญ๋Ÿ‰ ํ™•๋ณด๋ฐฉ์•ˆ _ ๊น€์›…๋ฝ โ… . ์„œ๋ก  ์ง€๋ฐฉ์ž์น˜์˜ ํ™œ์„ฑํ™”๋ฅผ ํ†ตํ•ด์„œ ๊ถŒ์œ„์ฃผ์˜์ฒด์ œ์— ์ˆœ์‘ํ•˜๊ณ  ๊ทธ๊ฒƒ์— ์ต์ˆ™ํ•ด ์žˆ๋Š” ์ง€์—ญ์ฃผ๋ฏผ, ์ง€์—ญ์—˜๋ฆฌํŠธ, ๊ด€๋ฃŒ, ์ž์น˜๋‹จ์ฒด์žฅ, ์ง€์—ญ์˜ํšŒ๋Š” ๊ถŒ์œ„์ฃผ์˜์  ์š”์†Œ๋ฅผ ๋ฐฐ์ฒ™ํ•˜๊ณ  ๊ด€์น˜์  ํ–‰ํƒœ๋ฅผ ๋ฒ—์–ด๋‚˜๋ ค๋Š” ๋…ธ๋ ฅ์„ ํ•ด์™”๋‹ค. -์ดํ›„ ์ƒ๋žต [์ง€์—ญ๋…ผ๋‹จ]๊ฐ•๊ฒฝ ๋˜์‚ด๋ฆฌ๊ธฐ๋ฅผ ์œ„ํ•œ ๊ธฐ๋ณธ๋ฐฉํ–ฅ๊ณผ ์‹ค์ฒœ๊ณผ์ œ _ ๊น€์ •์—ฐ โ… . ๊ฐ•๊ฒฝ ๋˜์‚ด๋ฆฌ๊ธฐ ์šด๋™์˜ ์˜์˜ ์šฐ๋ฆฌ๋‚˜๋ผ ์†Œ๋„์‹œ์˜ ์ ˆ๋Œ€๋‹ค์ˆ˜๋Š” ์ƒ์กด ์ž์ฒด๊ฐ€ ๋ถˆํˆฌ๋ช…ํ•œ ์ƒํƒœ์— ์žˆ๋‹ค. ๋Œ€๋ถ€๋ถ„์˜ ์†Œ๋„์‹œ๋Š” ๊ณ ์šฉ์ฐฝ์ถœ ๊ธฐ๋ฐ˜์ด ์ทจ์•ฝํ•˜๊ณ , ๊ธฐ๋ฐ˜์‹œ์„ค์ด ๋ถˆ๋น„ํ•˜๋ฉฐ, ๊ต์œก ์˜๋ฃŒ ๋“ฑ์˜ ์ƒํ™œํŽธ์ต๊ณผ ์ง๊ฒฐ๋œ ๊ธฐ๋Šฅ๋„ ์ƒ๋Œ€์ ์œผ๋กœ ๋นˆ์•ฝํ•œ ์ƒํƒœ์—์„œ ์นจ์ฒด์˜ ๊ตญ๋ฉด์„ ๋ฒ—์–ด๋‚˜์ง€ ๋ชปํ•˜๊ณ  ์žˆ๊ธฐ ๋•Œ๋ฌธ์ด๋‹ค. -์ดํ›„ ์ƒ๋žต [์‹œ์‚ฌ์นผ๋Ÿผ]์ƒˆ๋กญ๊ฒŒ ์—ด๋ฆฐ ใ€Œ๋ฐฑ์ œ๋ฌธํ™”๊ถŒ ๊ฐœ๋ฐœใ€_ ์ด๋ช…์ˆ˜ โ… . ๋“ค์–ด๊ฐ€๋Š” ๋ง ๋ฐฑ์ œ์—ญ์‚ฌ์žฌํ˜„๋‹จ์ง€ ๊ธฐ๊ณต์‹ ์ง€๋‚œ 98๋…„ 4์›” 21์ผ ๋ถ€์—ฌ ๋‚™ํ™”์•” ๊ฑด๋„ˆํŽธ ๊ทœ์•”๋ฉด ํ•ฉ์ •๋ฆฌ์—์„œ๋Š” ์šฐ๋ฆฌ ๋ฏผ์กฑ๋ฌธํ™”์‚ฌ์— ํฐ ํš์„ ๊ธ‹๋Š” ํ•˜๋‚˜์˜ ํ–‰์‚ฌ๊ฐ€ ์žˆ์—ˆ๋‹ค. -์ดํ›„ ์ƒ๋žต [์—ฐ๊ตฌ์›์†Œ์‹]์—ฐ๊ตฌ์›์‚ฌ์—… ์ •๋ณดํ™” ์‹œํ–‰๊ณ„ํš ์ˆ˜๋ฆฝ์„ ์œ„ํ•œ ์ „๋ฌธ๊ฐ€ ํ† ๋ก ํšŒ ๊ฐœ์ตœ 4์›” 20์ผ(ๆœˆ) ์˜คํ›„ 2์‹œ ์ถฉ๋‚จ๋„์ฒญ ๋Œ€ํšŒ์˜์‹ค์—์„œ ์ถฉ์ฒญ๋‚จ๋„ยท์ถฉ๋‚จ๋ฐœ์ „์—ฐ๊ตฌ์›ยทํ•œ๊ตญ์ •์ฑ…ํ•™ํšŒ(ํšŒ์žฅ ๊น€๋™ํ˜„) ๊ณต๋™ ์ฃผ๊ด€์œผ๋กœ ๊ณผํ•™์˜ ๋‚ (4์›” 21์ผ)๊ณผ ์ •๋ณดํ†ต์‹ ์˜ ๋‚ (4์›” 22์ผ)์„ ๊ธฐ๋…ํ•˜์—ฌ ์ถฉ์ฒญ๋‚จ๋„ ์ •๋ณดํ™” ๊ธฐ๋ณธ๊ณ„ํš ์‹คํ˜„์„ ์œ„ํ•œ "์ •๋ณดํ™” ์‹œํ–‰๊ณ„ํš ์ˆ˜๋ฆฝ๋ฐฉํ–ฅ๊ณผ ์ „๋žต"์ด๋ž€ ์ฃผ์ œ๋ฅผ ๊ฐ€์ง€๊ณ ใ€Œ์ „๋ฌธ๊ฐ€ ํ† ๋ก ํšŒใ€๋ฅผ ๊ฐœ์ตœํ–ˆ๋‹ค. -์ดํ›„ ์ƒ๋žต[ํŠน์ง‘]์ถฉ์ฒญ๋‚จ๋„ ๋ฏผ์„ ์ž์น˜๋„์ •์˜ ๋ฐœ์ „์ „๋žต ์ง€๋ฐฉ๋ฏผ์ฃผ์ฃผ์˜์˜ ๋ฐœ์ „๊ณผ ์ถฉ๋‚จ์˜ ์ž์น˜์—ญ๋Ÿ‰ ํ™•๋ณด๋ฐฉ์•ˆ _ ๊น€์›…๋ฝ 21์„ธ๊ธฐ ์ถฉ์ฒญ๋‚จ๋„ ์ž์น˜ํ–‰์ •์ฒด์ œ ๊ตฌ์ถ•๋ฐฉํ–ฅ _ ์ตœ๋ณ‘ํ•™ ์ถฉ์ฒญ๋‚จ๋„ ์ž์น˜ํ–‰์ •์˜ ํšจ๊ณผ์„ฑ ์ฆ๋Œ€๋ฐฉํ–ฅ _ ์ตœ์ฐฝํฌ ๋ฏผ์„ ์ž์น˜ 2๊ธฐ ์‹œ๋Œ€์˜ ์ง€๋ฐฉ์žฌ์ • ์ „๋ง๊ณผ ๊ณผ์ œ _ ๊น€ํ•™๋ฏผ [์ง€์—ญ๋…ผ๋‹จ]๊ฐ•๊ฒฝ ๋˜์‚ด๋ฆฌ๊ธฐ๋ฅผ ์œ„ํ•œ ๊ธฐ๋ณธ๋ฐฉํ–ฅ๊ณผ ์‹ค์ฒœ๊ณผ์ œ _ ๊น€์ •์—ฐ ๊ฐ•๊ฒฝ(ๆฑŸๆ™ฏ) ๋˜์‚ด๋ฆฌ๊ธฐ ์šด๋™ใ€๊ณผ ์ง€์—ญ์‚ฌํšŒ ์ฐธ์—ฌ _ ์†ก๋‘๋ฒ” ์ถฉ์ฒญ๋‚จ๋„ ์‹œ๊ตฐ์˜ ์„ฑ์žฅ์œ ํ˜• ๋น„๊ต _ ์ตœ์ข…ํ›„ [์‹œ์‚ฌ์นผ๋Ÿผ]์ƒˆ๋กญ๊ฒŒ ์—ด๋ฆฐ ใ€Œ๋ฐฑ์ œ๋ฌธํ™”๊ถŒ ๊ฐœ๋ฐœใ€_ ์ด๋ช…์ˆ˜ [์—ฐ๊ตฌ์›์†Œ์‹]์—ฐ๊ตฌ์›์‚ฌ์—…ยท์—ฐ๊ตฌ์›ํ™œ
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