Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Myung Sik Choi"'
Publikováno v:
Frontiers in Chemistry, Vol 12 (2024)
The demand for gas-sensing operations with lower electrical power and guaranteed sensitivity has increased over the decades due to worsening indoor air pollution. In this report, we develop room-temperature operational NH3 gas-sensing materials, whic
Externí odkaz:
https://doaj.org/article/589aac8e486c4fa5be824f0aa2b78fef
Autor:
Jiyeon Shin, Jeong Yun Hwang, Changyu Kim, Jimyeong Park, Jong Wook Roh, Sun-Woo Choi, Changhyun Jin, Myung Sik Choi
Publikováno v:
Sensors and Actuators Reports, Vol 8, Iss , Pp 100246- (2024)
In this study, non-oriented Au-decorated SnO2 nanospheres (NSs) were synthesized using hydrothermal and microwave methods. The SnO2 spheres ranged from hundreds of nanometers to a microscale. The oxygen vacancy on the surface increased after Au adsor
Externí odkaz:
https://doaj.org/article/441c6c46794f423a92d822e516304f4a
Autor:
Si Hoon Jeong, Gi Hyeon Han, Gi Hyun Park, Changhyun Jin, Jeong Yun Hwang, Myung Sik Choi, Se Hwang Kang, Joon Hyun Baik, Kyu Hyoung Lee, Seung Yong Lee
Publikováno v:
Sensors and Actuators Reports, Vol 8, Iss , Pp 100219- (2024)
Exhausting carbon-based gases from building construction or comfortable household supplies have caused the main pollution gas species for the indoor air environment. Given the variety of indoor activities, many reports have been challenged to find ro
Externí odkaz:
https://doaj.org/article/51b5c4f8ff054b2c986d6cc452d87591
Publikováno v:
Alexandria Engineering Journal, Vol 69, Iss , Pp 431-443 (2023)
After forming the double layer of SnO2 and Au, the compound of Sn and O with multiple band gaps was formed in a short time period via flame chemical vapor deposition (FCVD). The Sn component of SnO2 has fluidity and is the only one moving to the disc
Externí odkaz:
https://doaj.org/article/53fec6275ba94780bab3798cafd5c15f
Autor:
Changhyun Jin, Jong-Chan Lim, Min Young Kim, Myung Sik Choi, Sang-Il Kim, Seung-Hyub Baek, Sun-Jae Kim, Seung Yong Lee, Hyun-Sik Kim, Kyu Hyoung Lee
Publikováno v:
Journal of Asian Ceramic Societies, Vol 10, Iss 4, Pp 779-787 (2022)
WO3 nanostructures with different morphologies and dimensions were fabricated via solvothermal synthesis by adjusting the stirring time of the precursor solution. Ethanol-based solutions of the WCl6 precursor with various colors (dark green, yellow,
Externí odkaz:
https://doaj.org/article/40b6d1a1392e48c796ee0dd1e5130342
Autor:
Min Young Kim, Jeong Yun Hwang, Ali Mirzaei, Sun-Woo Choi, Sang-il Kim, Hyun-Sik Kim, Sun-Jae Kim, Jong Wook Roh, Myung Sik Choi, Kyu Hyoung Lee, Seung Yong Lee, Changhyun Jin
Publikováno v:
Adsorption Science & Technology, Vol 2023 (2023)
Herein, we report a simple and scalable synthesis route to prepare Ag-functionalized porous ZnO sheets and their enhanced NO2 gas sensing properties. Porous ZnO sheets functionalized with well-dispersed submicron Ag particles were prepared by using a
Externí odkaz:
https://doaj.org/article/288735ff644c4007a27cdd7bbc3df9eb
Publikováno v:
Chemosensors, Vol 11, Iss 2, p 140 (2023)
Since the increase in the emission of various Volatiles Organic Compounds, gas and formaldehyde gas have had a harmful effect on the human body, and gas sensors that can measure those gases were fabricated in this study. After Pt coating was performe
Externí odkaz:
https://doaj.org/article/a47d203a5e0f4ec1aa40c60613040e16
Autor:
Myung Sik Choi, Han Gil Na, Jae Hoon Bang, Wansik Oum, Sun-Woo Choi, Sang Sub Kim, Hyoun Woo Kim, Changhyun Jin
Publikováno v:
ACS Omega, Vol 4, Iss 7, Pp 11824-11831 (2019)
Externí odkaz:
https://doaj.org/article/860cfed5235c4c84afc90a2828c98ac3
Publikováno v:
Frontiers in Materials, Vol 6 (2019)
Herein, we present the effect of electron-beam irradiation (EBI) on the gas-sensing properties of Pd-functionalized reduced graphene oxide (RGO). Scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy wer
Externí odkaz:
https://doaj.org/article/7367b1f7db934589a064d2d58ce5de13
Publikováno v:
Nuclear Engineering and Technology, Vol 47, Iss 7, Pp 934-938 (2015)
This technical note provides some considerations for the metallographic observation of intergranular attack (IGA) in Alloy 600 steam generator tubes. The IGA region was crazed along the grain boundaries through a deformation by an applied stress. The
Externí odkaz:
https://doaj.org/article/6ab5e2e26a074b0a87845da4a8067cd3