"To do successful research, you don't need to know everything. You just need to know one thing that isn't known."
"Anything worth doing is worth doing twice, the first time quick and dirty and the second time the best way you can."
Arthur Leonard Schawlow (1921 ~ 1999; Nobel Prize, 1981, in physics for his work on lasers)
Welcome to the Yo-Sep Min Group at the Department of Chemical Engineering, Konkuk University, Seoul, Korea. Our research is based on chemical approaches, notably atomic layer deposition (ALD), to prepare functional materials for electronic and/or energy devices. Additionally, through in-situ analyses of the ALD process, we are studying the mechanisms governing the deposition of diverse films.
Recent
Publications
Hyeongjin Kim, Jieun Hyun, Gaeun Kim, Eunsang Lee, and Yo-Sep Min*, Chemistry of Materials 2024, 36(1), 247, (published in issue Jan 9, 2024; published online Dec 19, 2023)
Titanicone, obtained through molecular layer deposition (MLD) using TiCl4 and ethylene glycol (EG), is often regarded as a thin film of titanium ethylene glycolate [Ti(OCH2CH2O)2]. Nevertheless, titanicone exhibits a distinct vulnerability to moisture, while single crystals of Ti(OCH2CH2O)2 remain stable, even in the presence of water. To elucidate the origin of instability, we investigated the pathway of chemical degradation for titanicone using in situ and ex situ analytical methods such as Fourier transform infrared spectrometry, quartz crystal microbalance, quadrupole mass spectrometry, and X-ray photoelectron spectroscopy. Our analyses unveiled that the instability of the MLD-grown titanicone film in the presence of water can be primarily attributed to the high chlorine content present as Ti–Cl species and the coexistence of single-reacted EG species as well as double-reacted EG species, unlike in Ti(OCH2CH2O)2 crystals. Water molecules react with the Ti–Cl species, leading to the formation of Ti–OH species and the release of HCl gas. Furthermore, the single-reacted EG species undergo an intramolecular cyclization reaction catalyzed by HCl, resulting in the formation of Ti–OH and the liberation of ethylene oxide. Consequently, when exposed to water, the MLD-grown titanicone turns into a water-stable mixed film composed of TiO2 and Ti(OCH2CH2O)2.
학문에 대한 열정과 역량이 있는 학생 연구원들을 아래와 같이 모집합니다.
1. 모집 대상
석/박사 대학원생 및 학부생 연구원
2. 연구 분야
원자층 증착법의 활용성을 높이기 위한 표면화학 반응 및 메카니즘 연구
원자층 증착법에 의한 2차원 층상 구조 물질 합성 및 응용
전기화학적 수소발생촉매 연구
3. 지원 자격
석/박사 대학원생: 화학공학, 화학, 물리, 재료공학, 유기나노시스템, 융합신소재 등
이공계 관련 전공 학사 (석사) 학위자
학부생: 상기 관련 전공의 학부생 (대학원 진학 희망자 우대)
4. 지원 기간
석/박사 대학원생 및 학부생: 수시
5. 지원 방법: ysmin@konkuk.ac.kr로 이메일 발송 후 면담
6. 학생 연구원 처우
석/박사 대학원생: 학비 전액 및 연구과제 참여에 따른 학생인건비 지급
연구실: 재료소자화학 연구실 (신공학관 816호, 02-450-3197)
지도교수: 민요셉 교수 (건국대학교 화학공학과)
