Search Results - "Song, Jang Kun"

Contact electrification efficiency dependence on surface energy at the water-solid interface by Shahzad, Amir, Wijewardhana, K. Rohana, Song, Jang-Kun

“…Liquid-solid contact electrification is a useful mechanism to harvest wasted micromechanical energy. In this study, we investigate how the surface properties…”
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Hierarchical elasticity of bimesogenic liquid crystals with twist-bend nematic phase by Yun, Chang-Jun, Vengatesan, M. R., Vij, Jagdish K., Song, Jang-Kun

“…In 2001, Dozov predicted that twist-bend nematic phase can be spontaneously formed when K33 < 0 and K11/K22 > 2, and this phase has recently been discovered in…”
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Charge Modulation Layer and Wide‐Color Tunability in a QD‐LED with Multiemission Layers by Park, Sung‐Jae, Song, Suk‐Ho, Kim, Sang Soo, Song, Jang‐Kun

“…Widely tunable color emission from a single pixel is a promising but challenging technology for quantum‐dot light‐emitting diodes (QD‐LEDs). Even a QD‐LED…”
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Green Solvent Selection for All Solution‐Processed Inverted Quantum Dot Light Emitting Diode by Kim, Hyo‐Bin, Yoo, Jae‐In, Kang, Sung‐Cheon, Song, Jang‐Kun

“…Quantum‐dot light‐emitting diodes (QD‐LEDs) have gained attention as potential display technologies. However, the solvents used to dissolve a polymeric hole…”
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Electro-optical Characteristics of Aqueous Graphene Oxide Dispersion Depending on Ion Concentration by Hong, Seung-Ho, Shen, Tian-Zi, Song, Jang-Kun

“…Facile alignment control of graphene oxide (GO) particles in aqueous dispersions is a highly useful technique for various potential applications. Aqueous GO…”
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Selectivity of Threefold Symmetry in Epitaxial Alignment of Liquid Crystal Molecules on Macroscale Single‐Crystal Graphene by Shen, Tian‐Zi, Hong, Seung‐Ho, Lee, Jae‐Hyun, Kang, Seog‐Gyun, Lee, Bomi, Whang, Dongmok, Song, Jang‐Kun

“…Epitaxial alignment of organic liquid crystal (LC) molecules on single‐crystal graphene (SCG), an effective epitaxial molecular assembly template, can be used…”
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Computation of refractive index and optical retardation in stretched polymer films by Lim, Jung-Gu, Kwak, Keumcheol, Song, Jang-Kun

“…Functional polymer films are key components in the display industry, and the theoretical prediction of the optical properties of stretched polymer films is…”
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Multiresponsive Polymer Nanocomposite Liquid Crystals Having Heterogeneous Phase Transitions for Battery‐Free Temperature Maintenance Indicators by Priyadharshana, P. A. N. S., Park, Ju‐Young, Hong, Seung‐Ho, Song, Jang‐Kun

“…Multiresponsive functional materials that respond to more than one external stimulus are promising for novel photonic, electronic, and biomedical applications…”
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Chiral Light in Twisted Fabry–Pérot Cavities by Dyakov, Sergey A., Salakhova, Natalia S., Ignatov, Alexey V., Fradkin, Ilia M., Panov, Vitaly P., Song, Jang‐Kun, Gippius, Nikolay A.

“…Fundamental studies of the interaction of chiral light with chiral matter are important for the development of techniques that allow handedness‐selective…”
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Widely Tunable Optical Vortex Array Generator Based on Grid Patterned Liquid Crystal Cell by Lee, Doyeon, Lee, Heesu, Migara, L. K., Kwak, Keumcheol, Panov, Vitaly P., Song, Jang‐Kun

“…Since optical vortex (OV) beams possess an additional degree of freedom, orbital angular momentum, the beams can be utilized to enhance signal modulation in…”
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High-performance ITO thin films for on-cell touch sensor of foldable OLED displays by Park, Dong-pil, Park, Won-hyeok, Song, Jang-kun, Kim, Sang Soo

“…ITO thin films must have good electro-optical and mechanical characteristics to use them as integrated touch sensors for flexible OLED displays. We fabricated…”
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Laser Processing of Liquid Crystal Droplets with Diverse Internal Structures by Guo, Jin-Kun, Ling, Jinzhong, Yuan, Ying, Chang, Fengjiao, Wang, Xiaorui, Song, Jang-Kun

“…To control the spatial placement and organize micro/nanodroplets (NDs) has fundamental importance both in science and engineering. Cholesteric liquid crystal…”
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Manipulation of Hole and Exciton Distributions in Organic Light-Emitting Diodes with Dual Emission Layers by Song, Suk-Ho, Yoo, Jae-In, Kim, Hyo-Bin, Kang, Sung-Cheon, Kim, Kanghoon, Park, Sung-Jae, Yan, Qun, Song, Jang-Kun

“…The efficiency improvement of organic light-emitting diodes (OLEDs) is important but challenging. Here, we introduce a unique OLED with a hole modulation layer…”
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Comment on “Tunable Design of Structural Colors Produced by Pseudo‐1D Photonic Crystals of Graphene Oxide” and Thin‐Film Interference from Dried Graphene Oxide Film by Hong, Seung‐Ho, Song, Jang‐Kun

“…The mechanism of the iridescent color reflection from dried thin graphene oxide (GO) film on Si wafer is clarified. Dissimilarly to the photonic crystalline…”
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The Beauty of Twist-Bend Nematic Phase: Fast Switching Domains, First Order Fréedericksz Transition and a Hierarchy of Structures by Panov, Vitaly P., Song, Jang-Kun, Mehl, Georg H., Vij, Jagdish K.

“…The twist-bend nematic phase (NTB) exhibits a complicated hierarchy of structures responsible for several intriguing properties presented here. These are: the…”
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Highly efficient tandem organic light-emitting diodes using p-type metal halide copper iodide (CuI) by Kim, Kanghoon, Yoo, Jae-In, Kim, Hyo-Bin, Kang, Sung-Cheon, Jang, Jincheol, Parani, Sundararajan, Song, Jang-Kun

“…Efficient charge generation is essential for tandem organic light-emitting diode (OLED) devices. In this study, we introduce a p-type copper iodide (CuI) layer…”
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Widely Tunable GRIN Lenses Using Negative Dielectrophoretic Manipulation of Phosphate Nanosheets Colloid by Priyadharshana, P. A. N. S., Shen, Tian‐Zi, Hong, Seung‐Ho, Song, Jang‐Kun

“…Tunable gradient refractive index (GRIN) lens has attracted increasing attention from researchers due to its promising applicability in various optical and…”
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Alignment of Liquid Crystals Using a Molecular Layer with Patterned Molecular Density by Son, Jong-Ho, Zin, Wang-Cheol, Takezoe, Hideo, Song, Jang-Kun

“…The surface of self‐constructed molecular density modulation (SDM) exhibits a wide range of liquid crystal alignment capabilities including planar, tilted, and…”
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Water-assisted stable dispersal of graphene oxide in non-dispersible solvents and skin formation on the GO dispersion by Ahmad, Rana Tariq Mehmood, Hong, Seung-Ho, Shen, Tian-Zi, Song, Jang-Kun

“…Graphene oxide (GO) particles disperse well in a few polar solvents including water but do not disperse in non-polar and low dielectric constant solvents. The…”
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Optimization of particle size for high birefringence and fast switching time in electro-optical switching of graphene oxide dispersions by Ahmad, R T M, Hong, Seung-Ho, Shen, Tian-Zi, Song, Jang-Kun

“…In order to use graphene oxide (GO) dispersions for electro-optical applications, both a high GO concentration and a high electrical sensitivity are essential;…”
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