• Title/Summary/Keyword: electrophoretic

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Self-repairing Technology by Electrophoresis of Ni Nano-Particles for Heat Exchanger Tubes (Ni 나노입자의 전기영동 코팅에 의한 전열관 자가보수 기술 개발)

  • Lee, Gyoung-Ja;Lee, Min-Ku;Rhee, Chang-Kyu
    • Journal of Powder Materials
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    • v.14 no.4
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    • pp.238-244
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    • 2007
  • The electrophoretic deposition process of Ni nano-particles in organic suspension was employed for self-repairing of heat exchanger tubes. For this purpose, Ni nano-particles prepared by levitational gas condensation method were dispersed into the solution of ethanol with the addition of dispersant Hypermer KD2. For electrophoretic deposition of Ni nano-particles on the Ni alloy specimen, constant electric fields of 20 and 100 V $cm^{-1}$ were applied to the specimen in Ni-dispersed solution. It was found that as electrophoretic deposition proceeds, the size of the pit or crack remarkably decreased due to the agglomeration of Ni nano-particles at the pit or crack. This strongly suggests that the electrophoretic mobility of the charged particles is larger for the damaged part with a higher current value rather than outer surfaces with a lower current value.

Electrophoretic Deposition of Superconducting $YBa_2Cu_3O_{7-\delta}$ Films Added with Silver Addition

  • Li, Fenghua;Wang, Jue;Soh, Dea-Wha;Fan, Zhanguo
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2005.07a
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    • pp.260-261
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    • 2005
  • $YBa_2Cu_3O_{7-\delta}$ superconductor films have been prepared on silver substrates by electrophoretic deposition. As silver does not react with $YBa_2Cu_3O_{7-\delta}$ compound and has little influence on its superconductivity, it is usually doped in $YBa_2Cu_3O_7$ to improve the strength of the material and eliminate micro-cracks. It has been proved that Ag additive can lower the melting temperature of $YBa_2Cu_3O_{7-\delta}$ and act as linking bridge among $YBa_2Cu_3O_{7-\delta}$ particles, thus in this paper Ag doped $YBa_2Cu_3O_{7-\delta}$ thick films are prepared by electrophoretic co-deposition. As there are only some referenced experience formula and models for co-electrophoretic deposition and does not exist unified explanation, the behavior of Ag particles during co-electrophoretic deposition is also studied.

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Superoxide Dismutase Profiles in the Mesophilic Deinococcus Species

  • Yun, Young-Sun;Lee, Young-Nam
    • Journal of Microbiology
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    • v.39 no.3
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    • pp.232-235
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    • 2001
  • Electrophoretic resolution of superoxide dismutase (SOD) from the highly UV-resistant bacteria, Deinococcus species revealed multiple forms of superoxide dismutases (SODs) in D. radiodurans, D. grandis, and D. proteolyticus, as judged from electrophoretic properties and metal cofactors. A single SOD occurred in both D. radiophilus and D. radiopugnans. Deinococcal SODs were either MnSOD, FeSOD or cambialistic Mn/FeSOD. The unique SOD profile of each mesophilic Deinococcus species, multiplicity and metal cofactors would be valuable in identifying Deinococcus species.

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Advances in Microencapsulated Electrophoretic Ink for Flexible Electronic Paper Displays

  • McCreary, Michael D.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07a
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    • pp.234-235
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    • 2005
  • True electronic paper displays are being enabled by the development of two core technologies - plastic electronics for display backplanes and electrophoretic ink for use as the imaging layer. Electrophoretic ink developed by E Ink Corporation continues to advance performance along with parallel technology breakthroughs in flexible TFT backplanes. An overview of these advances in the ink imaging material will be discussed with special emphasis of the expected impact on the emerging flexible display applications.

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Sol-Gel Processing for Preparation of Metal Oxide Films

  • Korobova Natalya;Soh, Dea-Wha
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.07a
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    • pp.259-264
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    • 2000
  • Systematic research of metal alkoxide electrophoretic deposition has been developed. The formation mechanism of electrophoretic deposits has been offered. The structure study of dry and heat-treated electrophoretic deposits has been established. The concrete examples of one and bi-component oxide thin film formation were considered. The new approaches for thin film technology have developed on various substrates of different shapes and sizes. The correlation between thin film structure, mechanism of their formation, and physico-chemical properties has been determined.

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Studies on the Origin of Prunus yedoensis Matsumura 1. A comparative Electrophoretic Study on Wild P. subhirtella in Mt. Hanla, Cultivated P. yedoensis and P. donarium (왕벚의 기원에 관한 연구 1. 한라산자생올벚, 재배왕벚 및 산벚의 전기영동형 비교)

  • 한창열
    • Journal of Plant Biology
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    • v.20 no.1
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    • pp.1-5
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    • 1977
  • Horizontal starch gel electrophoresis in three buffers was used to compare the electrophoretic patterns in three cherry species, wild Prunus subhirtella, cultivated P. yedoensis and P. donarium. Electrophoretic patterns of glutamate oxaloacetate, transaminase-2(GOT-2), malate dehydrogenase-2(MDH-2), and phosphoglucose isomerase(PGI) in three species showed strong evidence that P. yedoensis might be originated by hybridization between P. subhirtella and P. donarium.

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Megabase-sized DNA isolation and electrophoretic karyotype of fusarium oxysporum schlecht

  • Park, Min-Seon;Min, Byung-Re
    • Journal of Microbiology
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    • v.33 no.2
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    • pp.132-135
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    • 1995
  • To investigate the electrophoretic karytype of Fusarium oxysporum, intact chromosomal DNA was separated by pulsed-field gel electrophoresis (PEGE). DNA extraction from nulcei, mycelia and protoplasts were compared with one another and with the quantity and the suitability for PFGE separation in agarose gel. As a result, the most useful extracting method for intact DNA was found to be that from protoplasts. By varying the electrophoretic conditions, 8 chromosomal DNA bounds were resolved. Using the Schizosaccharomyces pombe and Saccharomyces cerevisiae as size standards, the size of Fusarium oxysporum chromosomes was estimated to range from approximately 0.6 Mb TO 6.7 Mb, and total genome size was 26.7 Mb. The suitability of electrophoretic karyotyping as a tool for strain characterization is discussed.

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New Photo-addressable Electronic Paper Using An Electrophoretic Device

  • Kang, Seung-Youl;Kim, Chul-Am;Joung, Meyong-Ju;Yu, Dong-Guk;Ahn, Seong-Deok;Lee, Yong-Eui;Suh, Kyung-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.528-530
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    • 2003
  • We present a novel photo-addressable electronic paper using an electrophoretic device, which can show and sustain the 2D images transferred by the UV illumination. The device consists of the organic photoconducting layer reacting with the UV illumination and the electronic ink (white particles and blue dye) dispersing in a suspending medium. The voltage impression under illuminating of UV make an image be transferred to the electrophoretic cell. The transferred image can be maintained by the bistability of the electrophoretic device.

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Transflective Liquid Crystal Display with a High Aperture Ratio using Electrophoretic Particles for a Switchable Mirror

  • Bae, Kwang-Soo;Kim, Young-Wook;Choi, Gwang-Hei;Heo, Jeong-Uk;Yu, Chang-Jae;Kim, Jae-Hoon
    • Journal of Information Display
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    • v.11 no.3
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    • pp.119-122
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    • 2010
  • This paper proposes a transflective liquid crystal display (LCD) in a whole-pixel switchable configuration with a high aperture ratio using an electrophoretic particle layer (EPL). The switchable transflective LCD consisted of the liquid crystal layer as a display unit, and the EPL as a switchable mirror. The switching of the EPL between the mirror for the reflective mode and the transparency for the transmissive mode was performed by controlling electrophoretic nanoparticles with an applied voltage in a three-electrode structure. The single pixel was used as the whole transmissive or reflective mode that corresponded to the switchable EPL mirror. Thus, a transflective LCD with a high aperture ratio was obtained.

Electrophoretic Deposition of YBCO powder in mixed suspension solution of iso-prophanol and iso-buthanol (이소프로판올과 이소부탄올 용매에서의 YBCO 분말 영동전착)

  • Soh, Dae-Wha;Li, Ying-Mei;Park, Jung-Cheul;N., Korobova
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.11b
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    • pp.288-291
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    • 2001
  • It is very important to select suspension solution for forming electrophoretic deposited YBCO thick mm, because it is heavily affected to its superconducting properties. In this paper, high-temperature superconductor films of $YBa_{2}Cu_{3}O_{7-x}$ were fabricated by electrophoretic deposition (EPD) from alcohol-based suspension such as iso-propanol, iso-butanol, and their mixture. For the formation of YBCO dense and adherent coating on a silver wire by EPD, 1 % PEG(1000) 2 ml, as a additive for making their surface crack-free, was used for electrophoresis. As a results, the cracks were considerably decreased and the superconducting critical current density $(J_e)$ without/with PEG was $1200A/cm^2$ and $2020A/cm^2$, which films deposited in mix iso-propanol and iso-butanol suspension.

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