Journal
MICROCHIMICA ACTA
Volume 182, Issue 5-6, Pages 1079-1087Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-014-1425-0
Keywords
Layer-by-layer assembly; Nitric oxide microsensor; Nickel phthalocyaninetetrasulfonate; Dendrimer
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Funding
- EU
- state NRW in the framework of the HighTech.NRW program
- FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo - Brazil) [2008/00546-5]
- DAAD (Deutscher Akademischer Austauschdienst)
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We have developed an electrochemical sensor for nitric oxide that is based on multi-layers of nickel(II) phthalocyaninetetrasulfonate and a polyamidoamine dendrimer assembled on the surface of a carbon-fiber microelectrode. This sensor responds to nitric oxide at a working potential of 800 mV with a sensitivity of 5.54 pAa (TM)mu MaEuro3/4(1) which, however, depends on the dendrimer layer position deposited on the microelectrode. The limit of detection is as low as 5.5 mu M at a signal-to-noise ratio of 3. The electrode exhibits good selectivity for nitric oxide over common interferents including dopamine, nitrite, hydrogen peroxide, norepinephrine, epinephrine and ascorbic acid.
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