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Synthesis of self-bridged ZnO nanowires and their humidity sensing properties
Park, Soobin,Lee, Dongik,Kwak, Byungkwan,Lee, Han-Seung,Lee, Songjun,Yoo, Bongyoung Elsevier 2018 Sensors and actuators. B, Chemical Vol.268 No.-
<P><B>Abstract</B></P> <P>In this study, self-bridged ZnO nanowires were grown by a simple annealing process and their humidity sensing properties were investigated. The wurzite structure and high crystallinity of the ZnO nanowires were confirmed by XRD and PL analyses. The humidity sensing characteristics varied exponentially with increasing humidity. A conventional sensor device should have good repeatability and superior humidity sensing response. The experimentally obtained response and recovery times of the ZnO nanowires were 35.3 and 32.6 s, respectively. A possible humidity sensing mechanism is also proposed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The research is about the self-bridged ZnO nanowires grown by a simple annealing process and their humidity sensing properties. </LI> <LI> The wurzite structure and high crystallinity of the ZnO nanowires are confirmed by XRD and PL analysis. </LI> <LI> We showed that sensor device have good repeatability and superior humidity sensing response. </LI> <LI> The response and recovery times of the sensor device are 35.3 and 32.6 seconds, respectively. </LI> <LI> To evaluate further sensing behavior, suitable sensing mechanism is proposed. </LI> </UL> </P>
Park Gaeun,Jang Wooyoung Eric,Kim Seoyeon,Gonzales Edson Luck,Ji Jungeun,Choi Seunghwan,Kim Yujin,Park Ji Hwan,Mohammad Hazara Begum,Bang Geul,Kang Minkyung,Kim Soobin,Jeon Se Jin,Kim Jin Young,Kim Kw 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-
Autism spectrum disorder (ASD) is a neurodevelopmental disorder associated with impaired social behavior and communication, repetitive behaviors, and restricted interests. In addition to genetic factors, environmental factors such as prenatal drug exposure contribute to the development of ASD. However, how those prenatal factors induce behavioral deficits in the adult stage is not clear. To elucidate ASD pathogenesis at the molecular level, we performed a high-resolution mass spectrometry-based quantitative proteomic analysis on the prefrontal cortex (PFC) of mice exposed to valproic acid (VPA) in utero, a widely used animal model of ASD. Differentially expressed proteins (DEPs) in VPA-exposed mice showed significant overlap with ASD risk genes, including differentially expressed genes from the postmortem cortex of ASD patients. Functional annotations of the DEPs revealed significant enrichment in the Wnt/β-catenin signaling pathway, which is dysregulated by the upregulation of Rnf146 in VPA-exposed mice. Consistently, overexpressing Rnf146 in the PFC impaired social behaviors and altered the Wnt signaling pathway in adult mice. Furthermore, Rnf146-overexpressing PFC neurons showed increased excitatory synaptic transmission, which may underlie impaired social behavior. These results demonstrate that Rnf146 is critical for social behavior and that dysregulation of Rnf146 underlies social deficits in VPA-exposed mice.
다중벽 탄소나노튜브를 이용한 철근 부식 검출 센서 제작 연구
박수빈(Soobin Park),김성연(Sungyeon Kim),이수정(Sujeong Lee),최문정(Munjeong Choi),홍영준(Yeongjun Hong),권성준(Sungjun Kwon),유봉영(Bongyoung Yoo),윤상화(Sanghwa Yoon) 한국표면공학회 2021 한국표면공학회지 Vol.54 No.4
In this study, rebar corrosion detection sensor was fabricated using multi-walled carbon nanotubes (MWCNTs). MWCNTs were pre-treated in the acid electrolytes to attach the carboxylic acid to the surface of MWCNTs. The fabricated sensor was attached on the surface of rebar and it detected the corrosion of steel using LCR meter with variation of capacitance. The surface morphology and electrical properties were characterized using scanning electron microscope (SEM) and electrical test equipment, respectively. To verify the corrosion detection characteristics, comparison experiment using plastic bar was performed. Moreover, mechanism of corrosion detection sensor was discussed.