학과 정기 세미나 안내
■ 제 목: Nanoscale Applications of Optical Materials
■ 연 사: 김동환 교수 (성균관대학교 화학공학/고분자공학부)
■ 일 시: 2022년 5월 24(화) 오후 4시
■ Host : 신병하 교수
■ 참가자 접속정보 (3:50분까지 참가를 부탁드립니다)
■ Abstract :
Current advances and the challenges that lie ahead in developing optical materials for healthcare and biotechnology will be discussed. These advances include using plasmonic nanoparticles in biomolecular assay to probe dynamic behavior of various biomolecules. One of examples is plasmonic biosensors that has enabled LSPR-shift assay with single nanoparticles. Single-nanoparticle plasmonic sensors are particularly attractive because of better signal-to-noise resolution and low limits of detection. This promising probing tool on biomolecular assay should find their application in parallel screening of nucleic acid and protein profiles and will compete with current microarrays. Most recent development on a plasmonic dimer that utilizes plasmonic coupling will be also discussed.
Further, upconversion materials, Lanthanide trivalent ions (Ln3+) embedded in an inorganic host solid, which possesses the fascinating ability to convert multiple low-energy photons into a higher-energy photon will be discussed. Upconversion luminescence suggests the promise of Ln3+-doped materials in emerging novel applications, such as energy harvesting for solar cells or deep tissue optogenetics. The upconversion efficiency and the spectral purity are determined by the complex interaction between the host material and the lanthanide ion at an atomic level. However, the weak interaction inherited in the conventional host materials has been an obstacle of further improvements. In this regard, the novel host material that does not have a short-range order (1st coordination order) so as to maximize the host interactions will be discussed. This new material will be used in future laser technologies on photonic integrated circuit devices.