• Title, Summary, Keyword: electrophoretic

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Preparation and Characterization of a Layered Organic-inorganic Composite by the Electrophoretic Deposition of Plate-shaped Al2O3 Particles and Electrophoretic Resin (전기영동적층법을 통한 판상 알루미나 입자와 전기영동 수지의 배향 유무기 복합체 제조 및 물성평가)

  • Park, Hee Jeong;Lim, Hyung Mi;Choi, Sung-Churl;Kim, Younghee
    • Journal of the Korean Ceramic Society
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    • v.50 no.6
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    • pp.460-465
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    • 2013
  • Plate-shaped inorganic particles are coated onto a stainless steel substrate by the electrophoretic deposition of a precursor slurry which includes the inorganic particles of $Al_2O_3$ and polymer resin in mixed solvents to mimic the abalone shell structure, which is a composite of plate-shaped inorganic particles and organic interlayer binding materials with a layered orientation. The process parameters of the electrophoretic deposition include the voltage, coating time, and conductivity of the substrate. In addition, the suspension parameters are the particle size, concentration, viscosity, conductivity, and stability. We prepared an organic-inorganic composite coating with a high inorganic solid content by arraying the plate-shaped $Al_2O_3$ particles and electrophoretic resin via an electrophoretic deposition method. We analyzed the effect of the slurry composition and the electrophoretic deposition process parameters on the physical, mechanical and thermal properties of the coating layer, i.e., the thickness, density, particle orientation, Young's modulus and thermogravimetric analysis results.

Perspectives and Challenges of Electrophoretic Displays

  • Zhou, Guofu;Johnson, Mark T.;Henzen, Alex;Kamer, Jan van de
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.236-240
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    • 2005
  • The commercialization of an active matrix e-reader display using E Ink microencapsulated electrophoretic (MEP) ink marked a big step towards comfortable reading over an extended period of time in an electronic book, as the high resolution display, jointly realized by Philips, E Ink and Toppan, has a true paper-like look and feel. Alternative electrophoretic material systems are being developed by SiPix and Bridgestone and progress has been made in the past two years. In this paper, electrophoretic material systems are briefly reviewed, after which the perspectives and challenges of electrophoretic displays are addressed and methods for generating gray tones are presented and discussed.

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Electrophoretic Deposition of Ni Nano-particles for Self-repairing of Heat Exchanger Tubes

  • Lee, Gyoung-Ja;Pyun, Su-Il;Rhee, Chang-Kyu
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • pp.1211-1212
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    • 2006
  • The electrophoretic deposition process of Ni nano-particles was employed for self-repairing of heat exchanger tubes. For electrophoretic deposition of Ni nano-particles on pitted Ni alloy specimen, a constant electric field of 100 V $cm^{-1}$ was applied to the specimen for 180 s in Ni-dispersed solution. It was found that as electrophoretic deposition proceeded, the size of the pit remarkably decreased due to the agglomeration of Ni nano-particles at the pit. This strongly suggests that the electrophoretic mobility of the charged particles is larger for the pit with a higher current value rather than outer surfaces with a lower current value.

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Simulation of the Electrical Response of Charged Particles in the Fluid for Horizontal Switching Electrophoretic Cell

  • Yeo, Jun-Ho;Kim, Sang-Won;Lee, Gi-Dong
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.498-501
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    • 2009
  • Electrophoretic displays (EPDs) are attracting considerable attentions as a paper-like display. Especially, Electrophoretic cell consists of micron-sized, charged particles dispersed in a viscous fluid. When an external electric field is applied, the charged particles move with a speed proportional to the particle mobility and the local field strength. In electrophoretic displays fast switching times are required, so knowing the particle mobility is very important. In this paper, we study a novel simulation for calculating the particle motions submerged in a viscous fluid for horizontal switching electrophoretic cell.

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Comparison of electrophoretic karyotypes in fusarium

  • Min, Byung-Re
    • Journal of Microbiology
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    • v.33 no.4
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    • pp.334-338
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    • 1995
  • The electrophoretic karyotypes of 6 species in different Fusarium sections were examined by using contour-clamped homogeneous electric field (CHEF) gel electrophoresis. Intact chromosomal DNA was prepared from protoplasts and up to 9 distinct bands were separated on 0.7% or 0.8% agarose gel under several different conditions. Putative chromosome numbers varied from 6 to 9 amd polymorphic karyotypes were observed in different Fusarium sections. Using Schizosaccharomyces pombe and Saccharomyces cerevisiae chromosomes as standards, the sizes of the Fusarium spp. chromosomes were estimated. The electrophoretic karyotypes of F. moniliforme and F. subglutinans (section Liseola) were similar. Unidentified filamentour fungi, F. beomiforme was much closer to F. axysporum (section Elecgans) in karyotype and the karyotypes of F. napiforme were more similar to those of section Liseola than any other sections. F. graminearum (section Discolor) had a distinctive electrophoretic karyotype.

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Electrophoretic Superconducting Film Applications

  • Fenghua, Li;Jue, Wang;Soh, Dea-Wha;Zhanguo, Fan
    • Journal of the Speleological Society of Korea
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    • no.76
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    • pp.15-17
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    • 2006
  • [ $YBa_2Cu_3O_{7-{\delta}}$ ] 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.

Low Voltage and Rapid Response Time Electrophoretic Display

  • Lee, Y.E.;Cho, Y.T.;Choi, Y.G.;Park, S.C.;Lee, M.H.;Park, Y.M.;Kim, D.Y.;Kim, C.H.;An, C.H.;Kim, H.S.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.360-363
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    • 2009
  • In this paper, we describe new approach of ink particle fabrication method for electrophoretic display(EPD) with low voltage and rapid response time. Nano-size ink particles which fabricated using non-aqueous base modified emulsion process and micron-scale particles by non-solvent particle fabrication process are discussed. Finally, specially designed particles and panel structure fabricated considering the interactions between particle/particle, particle/media or particle/electrode dramatically reduce the driving voltages to ${\pm}$ 10V and improve the response time of less than 100msec and white reflectance of 58% for EPD using dielectric fluid as a medium. In case of EPD adapting micron-sized electrophoretic particles and a medium of air, the saturation voltage could be reduced to ${\pm}$ 40V and having white reflectance of 45% without scarification of electrophoretic mobility of the particles.

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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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    • 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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Electrophoretic Karyotyping by PFGE in the Genus Fusarium (Fusarium속에서 PFGE를 이용한 Electrophoretic Karyotyping)

  • Min, Byung-Re;Jung, Jin-Sook;Choi, Yong-Keel
    • The Korean Journal of Mycology
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    • v.26 no.2
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    • pp.135-143
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    • 1998
  • Contour-clamped homogeneous electric field gel electrophoresis was used to establish electrophoretic karyotype for 10 species of Fusarium sections Sporotrichiella, Liseola, Gibbosum, Discolor and Martiella. Intact chromosomal DNA was isolated from fungal protoplast and separated under various conditions according to their size in order to improve DNA separation. The numbers of chromosome-sized DNA molecules for individual species ranged from 5-13, with individual chromosomes ranging from 0.78 Mb to 7.20 Mb in size. The total genome DNA size of each species was estimated at about 18.32 Mb to 48.20 Mb. Comparison of karyotype profiles following Southern hybridization analysis with a randomly selected genomic probe of F. oxysporum formae speciales litii was carried out.

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