The desire to maintain thermal loads acting on re-entry vehicles within acceptable limits drives numerous activities pertaining to research and development of thermal-protection materials. Metallic thermal-protection materials with low mass densities and life-cycle costs as well as greater strength to withstand thermal loads have been widely employed...
2D Semiconductor Electronics Toward Beyond-CMOS Technology Chul-Ho Lee1, 2 1KU-KIST Graduate School of Converging Science & Technology, 2Department of Integrative Energy Engineering, Korea University, Seoul 02841, Republic of Korea Two-dimensional (2D) semiconductors such as transition metal dichalcogenides (TMDs) have emerged as a promising material for implementing beyond-CMOS...
Biological production of 3-hydroxypropionic acid from glycerol Prof. Sunghoon Park Department of Energy and Chemical Engineering, UNIST, Korea 3-Hydroxypropionic acid (3-HP) is an attractive platform chemical that has diverse applications in the chemical industries for paint, polymer, and consumer products. It can be synthesized chemically or biologically, but its commercial production has not been realized due to many technical challenges. We have studied a biological process for last ~15 years and succeeded in its efficient production on 100 L pilot-scale as represented by a high titer (>100 g/L), rate (>3 g/L/h), and yield (>0.95 mol/mol glycerol or >0.7 mol 3-HP carbon/mol substrate carbon). The work includes the selection of proper host microorganisms, optimization of gene expression, enzyme engineering, deletion of competing and 3-HP degradation pathways, optimization of energy and cofactor metabolisms, transport, adaptive evolution, etc. The study was collaborated with a paint company in Korea, and commercialization including process development and scale-up is now underway. This lecture summarizes and discusses our long journey with 3-HP....
2022학년도 2학기 에너지화학공학과 세미나 일정을 아래와 같이 안내드립니다. ※ 수강생의 경우, 총 8회 중 6회 이상 출석해야 성적 인정 가능 (3회 이상 결석 시 미통과) ※ 문의: 공과대학 교학팀 윤진아 (052-217-1806 / jinayoon@unist.ac.kr / 108동 2층 U203-2호) ...
Next-generation optoelectronics based on two-dimensional semiconductors Hyungjin Kim1* 1 Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea With the innovation of technologies that will impact our daily life such as the internet of things (IoT), wearable health care systems, digitally extended...
Taekyung Lee(School of Mechanical Engineering, Pusan National University, Korea) Multi-pass caliber-rolled Mg alloys possess a unique basal texture with split basal poles that are in contrast to alloys subjected to other plastic deformation processes. The intrinsic nature of texture development allows anisotropic material properties, which are...
Abstract Multi-functional materials that can convert one form of energy to another have drawn immense attention owing to their outstanding conversion efficiency and compatibility with CMOS semiconductor devices. Specifically, piezoelectric materials, which can be patterned in nano-thin-film or nano-particle forms, are suited for sensors, and actuators...
