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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Bright emission of Core/Double-shell Upconversion Nanophosphors under 800 nm NIR light

2018년 2월 13일 15시 06분 49초
INOR.P-206 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
A-Ra Hong, Kwangyeol Lee, Ho Seong Jang1,*
Department of Chemistry, Korea University, Korea
1Korea Institute of Science and Technology, Korea
Lanthanide doped upconversion nanophosphors (UCNPs) have unique properties such as long life time, photostability, and non-toxicity. Due to these properties, the UCNPs are suitable for bio application such as bio-imaging and bio sensor. Most UCNPs emit visible light by excitation with 980 nm near infrared (NIR) light. In this case, deep tissue imaging is difficult because the penetration depth of the 980 nm NIR light is greatly reduced due to the high absorption of water within biomolecules. Therefore, we need the UCNPs that exhibit strong emission under 800 nm NIR light where water absorption is low for using bio application. In this study, we synthesized core/shell (C/S) UCNPs that emit visible light under 800 nm NIR excitation. In addition, the core/double-shell (C/D-S) structure was introduced to enhance luminescence under 800 nm NIR light, and the C/D-S UCNPs showed 2.8 times brighter emission than C/S UCNPs. Furthermore, we investigated the applicability of bio-imaging using the C/D-S UCNPs.