Abstract
Here we report the electrochemical sensing of dopamine using cubic-shaped cobalt nanoparticles prepared by the thermal decomposition of a cobalt carbonyl precursor in an organic medium. Microscopic (TEM and FE-SEM) and spectroscopic (EDS) analyses indicated the formation of cubic-shaped nanoparticles with an almost uniform size of ~ 20 nm. The ultrasmall size of the nanoparticle provides more surface atoms than a larger one and thereby possesses an improved electrochemical activity. Electrochemical measurements showed an excellent detection of dopamine at the lowest concentration of 1 µM by the nanoparticles. A linear relationship between the response and dopamine concentration within 1–18 µM and sensitivity of 0.013 µA/µM was also observed. The nanoparticles also showed almost no response toward interfering molecules usually present in body fluids, such as uric acid, glucose, and fructose.
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The datasets generated during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
Kunal gratefully acknowledges the support from GGSIPU, New Delhi in the form of a research fellowship. Anindya Datta is thankful to the DST for FIST Grant (SR/FST/PSI-167/2011(C)) at GGSIPU. Tapan Sarkar acknowledges financial assistance from the Scientific and Engineering Research Board (SERB) through Grant EEQ/2018/000 715.
Funding
Prof. Datta is grateful to the Grant of Department of Science & Technology (DST) for the FIST Grant (SR/FST/PSI-167/2011(C)). Tapan Sarkar is grateful to the Scientific and Engineering Research Board (SERB) for the Grant EEQ/2018/000 715.
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K and R were responsible for the investigation, data acquisition, and writing of the original draft. TS and AD were responsible for conceptualization, funding acquisition, writing, reviewing, & editing of the manuscript and supervision.
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Kunal, Rohit, Datta, A. et al. Cubic-shaped cobalt nanoparticles for electrochemical detection of dopamine. J Mater Sci: Mater Electron 34, 210 (2023). https://doi.org/10.1007/s10854-022-09568-w
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DOI: https://doi.org/10.1007/s10854-022-09568-w