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학술지 Voltage Switchable Surface-Modified Carbon Black Nanoparticles for Dual-Particle Electrophoretic Displays
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저자
김주연, 오지영, 서경수
발행일
201401
출처
Carbon, v.66, pp.361-368
ISSN
0008-6223
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.carbon.2013.09.011
협약과제
13VB1900, 에너지 절감을 위한 7인치기준 2W급 환경적응 디스플레이 신모드 핵심 원천 기술 개발, 추혜용
초록
In order to produce the black color for electrophoretic display (EPD) applications in dual-particle systems, a primary-like sized carbon black (PCB) surface modification method is developed and the electrophoretic properties of the resulting functionalized particles are reported. The PCB surface was chemically modified by hydroxylation and subsequent esterification. The final capping material of the PCB nanoparticle surface was a bulky fatty oleic acid, which was expected to improve dispersion stability and to produce electrostatic chargeability in a low dielectric medium. The zeta potential calculated from the measured electrophoretic mobility with a charge control agent was -31 mV. When the negatively chargeable oleic acid-capped PCB nanoparticles mixed with the positively chargeable polymer-coated white TiO2 nanoparticles, the PCB nanoparticles showed electrophoretic movement at an applied bias voltage of less than 5 V, which demonstrated potential application for very low voltage operation in EPDs. © 2013 Elsevier Ltd. All rights reserved.
KSP 제안 키워드
Applied bias voltage, Black color, Charge Control, Dielectric medium, Low dielectric, Low voltage operation, Oleic acid, Particle system, Potential applications, Surface modification method, Surface-modified