• Title/Summary/Keyword: Sub- resonance

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Correlation between spin density and Vth instability of IGZO thin-film transistors

  • Park, Jee Ho;Lee, Sohyung;Lee, Hee Sung;Kim, Sung Ki;Park, Kwon-Shik;Yoon, Soo-Young
    • Current Applied Physics
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    • v.18 no.11
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    • pp.1447-1450
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    • 2018

  • The electron spin resonance (ESR) detects point defect of the In-Ga-Zn oxide (IGZO) like singly ionized oxygen vacancies and excess oxygen, and get spin density as a parameter of defect state. So, we demonstrated the spin density measurement of the IGZO film with various deposition conditions and it has linear relationship. Moreover, we matched the spin density with the total BTS and the threshold voltage ($V_{th}$) distribution of the IGZO thin film transistors. The total BTS ${\Delta}V_{th}$ and the $V_{th}$ distribution were degraded due to the spin density increases. The spin density is the useful indicator to predict $V_{th}$ instability of IGZO TFTs.

  • https://doi.org/10.1016/j.cap.2018.08.016 인용 KSCI

Improved Surface Plasmon Resonance Sensing Sensitivity due to an Electrochemically Potential-Induced Gold Reconstruction

  • Choi, Baeck B.;Kim, Bethy;Chen, Yiqi;Jiang, Peng
    • Journal of Electrochemical Science and Technology
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    • v.12 no.2
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    • pp.167-172
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    • 2021

  • he progressively improved sensing sensitivity (∆λSPR/∆n, nm/RIU) to detect the refractive index is observed on the SPR platform of an Au-covered epoxy gratings in an increase in potential cycling in a typical three-electrode cell. Here, a DVD-R optical disc was used as a structure template to prepare an Au-covered epoxy gratings, and the newly formed reverse track pitch structure on the epoxy substrate was used as a working electrode directly in aqueous sulfuric acid solution. It is expected that Au reconstruction by potential cycling in sulfuric acid electrolyte increases the packing density of Au atoms in the grain boundary and improves the propagation of electromagnetic waves.

  • https://doi.org/10.33961/jecst.2020.01767 인용 PDF KSCI

A Calix[4]pyrrole Bearing a Quaternary Ammonium Group: A Fluoride-Selective Anion Receptor

  • Oh, Ju Hyun;Lee, Joon Hwa;Kim, Sung Kuk
    • Journal of the Korean Magnetic Resonance Society
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    • v.25 no.4
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    • pp.45-50
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    • 2021

  • A calix[4]pyrrole (1) bearing a quaternary ammonium pendant via its meso phenoxy linker has been synthesized as the bromide salt form. It was revealed by 1H NMR spectroscopic analyses performed in DMSO-d6 that receptor 1 binds F- with high affinity and selectivity over other halide anions. The binding of receptor 1•Br- with F- and Cltakes place by anion metathesis with the anions including F- and Cl-.

  • https://doi.org/10.6564/JKMRS.2021.25.4.045 인용 PDF KSCI