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Myung Sik Choi 3 Articles
566 Extended Energy Conservation Law in Alloys: the Absence of Energy Non-Equilibrium
Myung Sik Choi, Han Gil Na, Changhyun Jin, Kyu Hyoung Lee
Korean J. Met. Mater. 2020;58(8):566-572.   Published online 2020 Jul 27
DOI: https://doi.org/10.3365/KJMM.2020.58.8.566

Assuming that many of the materials produced in a non-equilibrium state remain unchanged, an extended space–energy conservation law was proposed based on the existing energy conservation law. In the present study, by analyzing the well developed equilibrium binary phase diagram of iron (Fe) – carbon (C), we show that energy..... More

732 Low-Temperature H2S Sensors Based on Si-Coated SnO2 Nanowires
Myung Sik Choi, Ali Mirzaei, Jae Hoon Bang, Han Gil Na, Changhyun Jin, Wansik Oum, Seungmin Han, Sang Sub Kim, Hyoun Woo Kim
Korean J. Met. Mater. 2019;57(11):732-740.   Published online 2019 Nov 5
DOI: https://doi.org/10.3365/KJMM.2019.57.11.732

To attain high life standards, it is important to develop high-performance non-toxic gas sensors for public safety, environmental pollutant control, industrial processes, etc. Because reports on single element semiconductor-coated semiconducting metal oxides for sensing applications are rare, we synthesized SnO2 nanowires and coated them with a 5 nm-thick or 10..... More

492 Effect of E-Beams Irradiation Dose on the Sensing Properties of Pt-Functionalized Reduced Graphene Oxides Following Annealing of the 6 nm-Thick Pt Layer
Yong Jung Kwon, Ali Mirzaei, Han Gil Na, Sung Yong Kang, Myung Sik Choi, Jae Hoon Bang, Jaegab Lee, Inpil Kang, Sang Sub Kim, Hyoun Woo Kim
Korean J. Met. Mater. 2017;55(7):492-502.   Published online 2017 Jul 4
DOI: https://doi.org/10.3365/KJMM.2017.55.7.492

Pt-functionalized RGO samples were prepared and subsequently irradiated with 2-MeV electron beams (e-beams). The effect of e-beam dose on the structural, electrical, and gas sensing properties of the samples was investigated. E-beam irradiation was found to induce significant microstructural changes in the Pt-functionalized RGO. Measurements of NO2 sensing at room..... More

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