主题:Tailored Nanofiber Sensors: Present and Future
主讲人:II-Doo Kim
地点: 延安路校区纺织科技创新中心楼217
时间: 2019-06-18 10:30:00
主讲人简介：
II-Doo Kim received his B.S. in Inorganic Materials Engineering from Hanyang University in 1997. He did his M.S. and Ph.D. in Materials Science and Engineering at KAIST. Professor Kim is an expert in the field of nanofibers, and have published over 200 papers, in which there are 40 cover-featured articles. He received many awards, including:The Grand Prize at the 9th KINC Fusion Research Award (2019), Certificate of commendation by Ministry of Science and ICT (2019),Associate Editor (2018, ACS Nano, ACS Publications), 2018 National R&D Excellence 100 Selection Grand Prize, Chairman of Organizing Committee of 2018 KAIST MSE/BCE International Workshop, Songok Science Award, Plenary Talk in 5th International Conference on Electrospinning (2018), Founding member of Young Korean Academy of Science and Technology (Y-KAST, 2017),Young Ceramist Award in the Korea Ceramic Conference 2016, Chairman of Organizing Committee of KAIST International MSE Workshop 2016, Plenary Talk in 4th International Conference on Electrospinning (Italy, 2014), A presidential award to the national industrial development through the invention promotion at the 51th invention day (2016), The International Cooperation Award in the celebration of KAIST’s 45th Anniversary (2016), The Grand Prize, EEWS Award (KAIST President Award, 2016), Excellent Lecture Award: Nano IP Enterprise Program at Seoul National University (2014).
内容摘要：
Facile synthesis of porous nanobuilding blocks with high surface area and uniform catalyst functionalization has always been regarded as an essential requirement for the development of highly sensitive and selective chemical sensors. Currently, commercially available metal oxide based sensors suffer from rather low sensitivity and selectivity, particularly under highly humid conditions. Electrospun one-dimensional (1-D) metal oxide structures offer most peculiar ultrafine features characterized with high surface area-to-volume ratio and interconnectivity of NPs. These features are imperative in attempt to fully exhaust manifold benefits of gas-sensing materials because they are associated with ultrahigh modulation of Schottky barrier during sequential exposure of sensing surface to air and analyte gas. As a futuristic diagnosis platform, breath analysis is gaining much attention because it is a noninvasive, simple, and low cost diagnostic method. Very promising clinical applications have been demonstrated for diagnostic purposes by correlation analysis between exhaled breath components and specific diseases. In addition, diverse breath molecules, which serve as biomarkers for specific diseases, are precisely identified by statistical pattern recognition studies. To further improve the accuracy of breath analysis as a diagnostic tool, breath sampling, biomarker sensing, and data analysis should be optimized. In particular, development of high performance breath sensors, which can detect biomarkers at the ppb-level in exhaled breath, is one of the most critical challenges. Due to the presence of numerous interfering gas species in exhaled breath, selective detection of specific biomarkers is also important. In this presentation, I summarize recent progress and a collection of advances, particularly focused on the synthesis, characterization, and utilization of electrospun metal oxides which are homogeneously functionalized by single and/or bimetallic catalysts. I will introduce possible future research direction and potential suitability of 3D nanofibers for applications in colorimetric sensors, exhaled breath gas analyzing sensors for early stage disease diagnosis. Sensor arrays are further employed to enable pattern recognition capable of discriminating between simulated biomarkers and controlled breath. The results provide a new class of multicomponent catalytic materials, demonstrating potential for achieving reliable breath analysis sensing.
