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18 results on '"Yang, Mihyun"'

2. Electrodeless method for ultra-low mobility with carrier-resolution of nanochannel.

Author

Kim, Yongjin, Nguyen, Thao Phuong, Yang, Mihyun, Yoon, Hyojin, Sharma, Manoj Kumar, Lee, Jungsub, Lee, Hoyeol, Oh, Suar, Ree, Moonhor, Son, Junwoo, Shim, Ji Hoon, Kim, Jeehoon, Lim, Seong Chu, and Ihm, Kyuwook

Subjects
ELECTRON mobility, ELECTRON spectroscopy, NANOSTRUCTURED materials, ELECTRONIC equipment, CHARGE carriers, CHARGE carrier mobility
Abstract

As the channel lengths of electronic devices are scaled down to the nanometer range, the conventional methods to evaluate charge-carrier mobility approach a technical limit that is imposed by interfering effects of the electrode and forcing field. In this study, we demonstrate that electron spectroscopy provides additional (yet hidden) information on unipolar charge transport, which is free from conventional problems. We demonstrate that the estimated effective diffusion current through the target sample allows the measurement that is precise enough (10−4 cm2/V s) to obtain the mobility of electrons μelectron and holes μhole in nanolength organic channels. Using this method, we show how μelectron and μhole are correlated with the local structural order of poly(3-hexylthiophene) at the nanoscale. This method enables in situ charge-resolved observations of μelectron and μhole by eliminating the need for electrode and forcing field and will help to expand our understanding of charge conduction in nanoscale materials. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Extreme Enhancement of Carbon Hydrogasification via Mechanochemistry

Author

Han, Gao‐Feng, primary, Zhang, Peng, additional, Scholzen, Pascal, additional, Noh, Hyuk‐Jun, additional, Yang, Mihyun, additional, Kweon, Do Hyung, additional, Jeon, Jong‐Pil, additional, Kim, Young Hyun, additional, Kim, Seong‐Wook, additional, Han, Sun‐Phil, additional, Andreev, Andrey S., additional, Lang, Guillaume, additional, Ihm, Kyuwook, additional, Li, Feng, additional, d'Espinose de Lacaillerie, Jean‐Baptiste, additional, and Baek, Jong‐Beom, additional

Published
2022
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12. Template Engineering of Metal-to-Insulator Transitions in Epitaxial Bilayer Nickelate Thin Films

Author

Lee, Jongmin, primary, Kim, Gi-Yeop, additional, Jeong, Seyeop, additional, Yang, Mihyun, additional, Kim, Jong-Woo, additional, Cho, Byeong-Gwan, additional, Choi, Yongseong, additional, Kim, Sangmo, additional, Choi, Jin San, additional, Lee, Tae Kwon, additional, Kim, Jiwoong, additional, Lee, Dong Ryeol, additional, Chang, Seo Hyoung, additional, Park, Sungkyun, additional, Jung, Jong Hoon, additional, Bark, Chung Wung, additional, Koo, Tae-Young, additional, Ryan, Philip J., additional, Ihm, Kyuwook, additional, Kim, Sanghoon, additional, Choi, Si-Young, additional, Kim, Tae Heon, additional, and Lee, Sanghan, additional

Published
2021
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13. Electrochemical Generation of Mesopores and Residual Oxygen for the Enhanced Activity of Silver Electrocatalysts

Author

Mohanty, Sangram Keshari, primary, Kim, Sol Jin, additional, Kim, Ji Su, additional, Lim, Yun Ji, additional, Kim, Sanghyeok, additional, Yang, Mihyun, additional, Park, Youchang, additional, Jeong, Jiung, additional, Ihm, Kyuwook, additional, Cho, Sung Ki, additional, Park, Kang Hyun, additional, Shin, Heon Cheol, additional, Lee, Hosik, additional, Nam, Ki Min, additional, and Yoo, Hyun Deog, additional

Published
2021
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18. Selective catalytic burning of graphene by SiOx layer depletion.

Author

Lee KJ, Ihm K, Kumar Y, Baik J, Yang M, Shin HJ, Kang TH, Chung S, and Hong BH

Abstract

We report catalytic decomposition of few-layer graphene on an Au/SiOx/Si surface wherein oxygen is supplied by dissociation of the native SiOx layer at a relatively low temperature of 400 °C. The detailed chemical evolution of the graphene covered SiOx/Si surface with and without gold during the catalytic process is investigated using a spatially resolved photoelectron emission method. The oxygen atoms from the native SiOx layer activate the gold-mediated catalytic decomposition of the entire graphene layer, resulting in the formation of direct contact between the Au and the Si substrate. The notably low contact resistivity found in this system suggests that the catalytic depletion of a SiOx layer could realize a new way to micromanufacture high-quality electrical contact.

Published
2014
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