P1OS.5 - Luminescent optical fiber Hg2+ sensor based on an oligodeoxyribonucleotide sequence
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-1 - Optical Sensors
- N. De Acha, C. Elosua, P. Zubiate, F. Arregui - Public University of Navarra, Pamplona (Spain)
- 625 - 626
A luminescent optical fiber sensor fabricated by Layer-by-Layer nanoassembly for mercury detection is presented in this work. The luminophore, Atto-390, has been linked to a mercury sensitive oligonucleotide sequence: due to the strong selective binding of the mercury ions to the thyminethymine pairs of this sequence, its shape changes in the presence of that metal ion. This change involves a variation of the luminescent intensity that is coupled to the optical fiber, which allows the mercury concentration to be monitored. The sensor detects 10-7 M Hg concentrations and shows a reversible behavior.