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Clumping Between Carbon Black and Titanium Dioxide Pigment by Water Vapor Absorption and Its Correlation with Electrophoretic Display

Authors
Kim, Tan YoungLee, Sang-IlPark, Sang-HyunHa, Hyun-JunPark, Young-WookKim, Se JungKim, Chul AmKim, Young-ChoJu, Byeong-Kwon
Issue Date
10월-2019
Publisher
AMER SCIENTIFIC PUBLISHERS
Keywords
Gas Barrier; Electrophoretic Display (EPD); Layer-By-Layer (LBL); Water Vapor Transmission Rate (WVTR); Clumping Phenomenon
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.19, no.10, pp.6444 - 6451
Indexed
SCIE
Journal Title
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume
19
Number
10
Start Page
6444
End Page
6451
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/62607
DOI
10.1166/jnn.2019.17070
ISSN
1533-4880
Abstract
Carbon black and titanium dioxide have been widely used as pigment particles for electrophoretic displays. However, the effect of external water vapor on these pigment particles has not yet been presented. Therefore, in this work, we report the clumping phenomenon between pigment particles as a result of water vapor absorption. To verify clumping between pigment particles, various analysis techniques were used, including scanning electron microscopy, atomic force microscopy, zeta potential measurement, and Raman spectroscopy. We examined the Raman spectrum of carbon black to demonstrate the effect of water vapor absorption on particles. According to the Raman spectrum analysis, the 2D and 2D' peak intensities were significantly increased; moreover, the full widths at half maximum were modified. Thus, we concluded that water vapor absorption on pigment particles can induce the clumping phenomenon on pigments. To protect an electrophoretic display device from external gas transmission, we applied a nanocomposites gas barrier film to the device. The device lifetime was consequently improved by 336%.
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공과대학 (전기전자공학부)
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