| 초록 |
Silver ion mediated fluorescence enhancement on DNA-templated silver nanoclusters (DNA-AgNCs) is investigated as new, simple, sensitive and rapid type of silver ion detection probe. The DNA-AgNCs probe is prepared by chemical reduction method using air-saturated distilled water solution. Through analyzing the DNA-AgNCs probe using fluorescence spectroscopy and mass spectrometry, silver ion plays a role as a bridge for two DNA-AgNCs strands which emits strong green fluorescence as 43.9 % of quantum yield relative to Rhodamine 6G. Also utilizing the fluorescence enhancement of DNA-AgNCs by silver ions addition, we suggest a quantitative silver ion detection method which has low detection limit as 10 nM. |
