Electrochemical Performance of Porous Diamond-like Carbon Electrodes for Sensing Hormones, Neurotransmitters, and Endocrine Disruptors

Paul May, Hudson Zanin, Evaldo Corat, Tiago Silva, Orlando Fatibello-Filho

Research output: Contribution to journalArticle (Academic Journal)peer-review

31 Citations (Scopus)

Abstract

Porous diamond-like carbon (DLC) electrodes
have been prepared, and their electrochemical performance
was explored. For electrode preparation, a thin DLC film was
deposited onto a densely packed forest of highly porous,
vertically aligned multiwalled carbon nanotubes (VACNT).
DLC deposition caused the tips of the carbon nanotubes to
clump together to form a microstructured surface with an
enlarged surface area. DLC:VACNT electrodes show fast
charge transfer, which is promising for several electrochemical
applications, including electroanalysis. DLC:VACNT electrodes
were applied to the determination of targeted molecules such as dopamine (DA) and epinephrine (EP), which are neurotransmitters/hormones, and acetaminophen (AC), an endocrine disruptor. Using simple and low-cost techniques, such as cyclic voltammetry, analytical curves in the concentration range from 10 to 100 μmol L−1 were obtained and excellent analytical parameters achieved, including high analytical sensitivity, good response stability, and low limits of detection of 2.9, 4.5, and 2.3 μmol L−1 for DA, EP, and AC, respectively.
Original languageEnglish
Pages (from-to) 21086−21092
Number of pages6
JournalACS Applied Materials and Interfaces
Volume6
DOIs
Publication statusPublished - 17 Nov 2014

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