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  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A Localized Surface Plasmon Resonance (LSPR)-based, simple, receptor-free and regeneratable Hg2+ detection system

2015년 8월 27일 10시 51분 45초
ANAL1.O-11 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 09시 : 40분
분석화학 - Oral Presentation of Young Analytical Chemists I
저자 및
박진호, 김민곤*
광주과학기술원(GIST) 화학과, Korea

A simple, receptor-free and regeneratable of Hg2+ sensor, which utilizes localized surface plasmon resonance (LSPR) shifts of a gold nanorod (GNR), has been developed. Precipitation induced by coordination of Hg2+ to citrate alters the local refractive index (RI) around the GNR surface on glass slide, promoting a red-shift in its LSPR absorption peak. This phenomenon is used to design a sensor that enables quantitative detection of Hg2+ in the 1 nM to 1 mM concentration range with good linearity (0.9507 correlation coefficient). A high selectivity of this sensor for Hg2+ is demonstrated by the specific LSPR red-shift of 27.67 nm promoted by this metal ion in comparison to those caused by other metal ions. In addition, the reusability of the new sensor chip is shown by its successful reuse eight-times following successive washing/precipitation steps. Lastly, the sensor displays excellent recoveries in spiking test with real water samples, such as tap water, lake and river. The simple combination of precipitation of Hg2+-citrate complex and the LSPR red-shift has led to the design of a novel sensing strategy for Hg2+ detection.