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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
INOR.P-35 |
| Subject |
Quantum dots-based fluorescence sensor for sensitive detection of hydrogen peroxide |
| Authors |
Sujin Yoon, Yun Sik Nam1, Kang-Bong Lee*
Green City Technology Institute, Korea Institute of Science and Technology, Korea
1Advanced Analysis Center, Korea Institute of Science and Technology, Korea
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| Abstract |
Quantum dots are being developed for a various kind of applications. We use quantum dots for hydrogen peroxide sensor because of their high brightness and high luminescence. Transmission electron microscopy (TEM) characterizations indicate that the size of quantum dots are about 5–10 nm, respectively. The quantum dots showed strong orange luminescence under irradiation with ultra-violet light. For this Quantum dot, the excitation peak was 222 nm and the emission peak was 600 nm. As the concentration of hydrogen peroxide increased, the fluorescence intensity of the emission peak decreased. The optimal conditions such as pH, temperature in solution stimulated to a more rapid quenching phenomenon in the optimized quantum dot system. The fluorescence intensity ratios of the optimized quantum dot solution exhibited a linear correlation with the hydrogen peroxide with concentrations (y=-0.50762x+443.7775, r2=0.96068)
This sensor has high property and can selectively detect hydrogen peroxide.
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| E-mail |
G18004@kist.re.kr |
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122nd General Meeting of the KCS