Enhanced switching behavior of iron oxide nanoparticle-doped liquid-crystal display

Woo Seung Koo; Hyung Koo Chung; Hong Gyu Park; Jae Jun Han; Hae Chang Jeong; Min Jae Cho; Dai Hyun Kim; Dae Shik Seo

doi:10.1166/jnn.2014.9953

Enhanced switching behavior of iron oxide nanoparticle-doped liquid-crystal display

Woo Seung Koo, Hyung Koo Chung, Hong Gyu Park, Jae Jun Han, Hae Chang Jeong, Min Jae Cho, Dai Hyun Kim, Dae Shik Seo

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

It is well known that doping nanoparticles (NPs) in liquid crystals (LCs) can easily change the physical and electro-optical properties of LC mixture. In this paper, we demonstrate homogeneous, aligned nematic LC (N-LC) system dispersed in iron oxide (Fe₂O₃) NPs. The prepared Fe₂O₃ NPs have an average particle size of 50 nm. By changing the doping concentration of Fe₂O₃ NPs, we observed the characteristics of LC systems. Electrooptical (EO) characteristics included faster rising and falling times (2.14 ms and 10.24 ms, respectively) and lower driving voltage (1.45 V) compared with a pure N-LC cell. We demonstrated these results via the relationship between dielectric constant and LC device properties. The results were verified by software simulation based on general physical properties. Moreover, we observed that LC system with Fe₂O₃ NPs could be accomplished without capacitance hysteresis by capturing charged impurities. Superior performance of LC cell with Fe₂O₃ NPs indicates that the proposed LC system have strong potential for use in the production of advanced LC displays.

Original language	English
Pages (from-to)	8609-8614
Number of pages	6
Journal	Journal of Nanoscience and Nanotechnology
Volume	14
Issue number	11
DOIs	https://doi.org/10.1166/jnn.2014.9953
Publication status	Published - 2014 Nov 1

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Biomedical Engineering
Materials Science(all)
Condensed Matter Physics

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Koo, W. S., Chung, H. K., Park, H. G., Han, J. J., Jeong, H. C., Cho, M. J., Kim, D. H., & Seo, D. S. (2014). Enhanced switching behavior of iron oxide nanoparticle-doped liquid-crystal display. Journal of Nanoscience and Nanotechnology, 14(11), 8609-8614. https://doi.org/10.1166/jnn.2014.9953

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title = "Enhanced switching behavior of iron oxide nanoparticle-doped liquid-crystal display",

abstract = "It is well known that doping nanoparticles (NPs) in liquid crystals (LCs) can easily change the physical and electro-optical properties of LC mixture. In this paper, we demonstrate homogeneous, aligned nematic LC (N-LC) system dispersed in iron oxide (Fe2O3) NPs. The prepared Fe2O3 NPs have an average particle size of 50 nm. By changing the doping concentration of Fe2O3 NPs, we observed the characteristics of LC systems. Electrooptical (EO) characteristics included faster rising and falling times (2.14 ms and 10.24 ms, respectively) and lower driving voltage (1.45 V) compared with a pure N-LC cell. We demonstrated these results via the relationship between dielectric constant and LC device properties. The results were verified by software simulation based on general physical properties. Moreover, we observed that LC system with Fe2O3 NPs could be accomplished without capacitance hysteresis by capturing charged impurities. Superior performance of LC cell with Fe2O3 NPs indicates that the proposed LC system have strong potential for use in the production of advanced LC displays.",

author = "Koo, {Woo Seung} and Chung, {Hyung Koo} and Park, {Hong Gyu} and Han, {Jae Jun} and Jeong, {Hae Chang} and Cho, {Min Jae} and Kim, {Dai Hyun} and Seo, {Dae Shik}",

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doi = "10.1166/jnn.2014.9953",

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AU - Koo, Woo Seung

AU - Chung, Hyung Koo

AU - Park, Hong Gyu

AU - Han, Jae Jun

AU - Jeong, Hae Chang

AU - Cho, Min Jae

AU - Kim, Dai Hyun

AU - Seo, Dae Shik

PY - 2014/11/1

Y1 - 2014/11/1

N2 - It is well known that doping nanoparticles (NPs) in liquid crystals (LCs) can easily change the physical and electro-optical properties of LC mixture. In this paper, we demonstrate homogeneous, aligned nematic LC (N-LC) system dispersed in iron oxide (Fe2O3) NPs. The prepared Fe2O3 NPs have an average particle size of 50 nm. By changing the doping concentration of Fe2O3 NPs, we observed the characteristics of LC systems. Electrooptical (EO) characteristics included faster rising and falling times (2.14 ms and 10.24 ms, respectively) and lower driving voltage (1.45 V) compared with a pure N-LC cell. We demonstrated these results via the relationship between dielectric constant and LC device properties. The results were verified by software simulation based on general physical properties. Moreover, we observed that LC system with Fe2O3 NPs could be accomplished without capacitance hysteresis by capturing charged impurities. Superior performance of LC cell with Fe2O3 NPs indicates that the proposed LC system have strong potential for use in the production of advanced LC displays.

AB - It is well known that doping nanoparticles (NPs) in liquid crystals (LCs) can easily change the physical and electro-optical properties of LC mixture. In this paper, we demonstrate homogeneous, aligned nematic LC (N-LC) system dispersed in iron oxide (Fe2O3) NPs. The prepared Fe2O3 NPs have an average particle size of 50 nm. By changing the doping concentration of Fe2O3 NPs, we observed the characteristics of LC systems. Electrooptical (EO) characteristics included faster rising and falling times (2.14 ms and 10.24 ms, respectively) and lower driving voltage (1.45 V) compared with a pure N-LC cell. We demonstrated these results via the relationship between dielectric constant and LC device properties. The results were verified by software simulation based on general physical properties. Moreover, we observed that LC system with Fe2O3 NPs could be accomplished without capacitance hysteresis by capturing charged impurities. Superior performance of LC cell with Fe2O3 NPs indicates that the proposed LC system have strong potential for use in the production of advanced LC displays.

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