Dip-coated carbon nanotube surface deposits as stable, effective response enhancers in pencil lead electrode voltammetry.

ABSTRACT: Graphitic pencil leads (PLs) are inexpensive writing accessories, readily available in stationery shops. Because the round filaments have high conductivity, they are excellent candidates for sustainable electroanalytical sensor fabrication. Here, we show that dip-coated carbon nanotube (CNT) surface deposits can stably enhance the faradaic redox response of cylindrical pencil lead electrodes (PLEs), with just ten simple sequential immersions of assembled PLEs in an aqueous suspension of CNTs producing significant improvement in their analytical performance. Cyclic (CV) and differential pulse (DPV) voltammetry of ferricyanide with unmodified and CNT-modified PLEs confirmed the reproducibility of the modification procedure and the reliability of the extent of signal amplification, as well as

SUBMITTER: Chatree K 

PROVIDER: S-EPMC10628696 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature