Next Article in Journal
Blood Clot Phenotyping by Rheometry: Platelets and Fibrinogen Chemistry Affect Stress-Softening and -Stiffening at Large Oscillation Amplitude
Next Article in Special Issue
Different Electrochemical Sensor Designs Based on Diazonium Salts and Gold Nanoparticles for Pico Molar Detection of Metals
Previous Article in Journal
Recent Advances in Asymmetric Iron Catalysis
Previous Article in Special Issue
Recent Advances in Polymeric Nanoparticle-Encapsulated Drugs against Intracellular Infections

Electrochemical Properties of Screen-Printed Carbon Nano-Onion Electrodes

School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
FutureNeuro SFI Research Centre, Dublin, Ireland
Authors to whom correspondence should be addressed.
Academic Editor: Ashok Kakkar
Molecules 2020, 25(17), 3884;
Received: 19 June 2020 / Revised: 21 August 2020 / Accepted: 24 August 2020 / Published: 26 August 2020
(This article belongs to the Special Issue Nanochemistry: Good Beginnings for a Cross-Disciplinary Platform)
The properties of carbon nano-onions (CNOs) make them attractive electrode materials/additives for the development of low-cost, simple to use and highly sensitive Screen Printed Electrodes (SPEs). Here, we report the development of the first CNO-based ink for the fabrication of low-cost and disposable electrodes, leading to high-performance sensors. Achieving a true dispersion of CNOs is intrinsically challenging and a key aspect of the ink formulation. The screen-printing ink formulation is achieved by carefully selecting and optimising the conductive materials (graphite (GRT) and CNOs), the polymer binder, the organic solvent and the plasticiser. Our CNO/GRT-based screen-printed electrodes consist of an interconnected network of conducting carbon particles with a uniform distribution. Electrochemical studies show a heterogeneous electron transfer rate constant of 1.3 ± 0.7 × 10−3 cm·s−1 and a higher current density than the ferrocene/ferrocenium coupled to a commercial graphite SPEs. In addition, the CNO/GRT SPE can detect dopamine in the concentration range of 10.0–99.9 µM with a limit of detection of 0.92 µM (N = 3). They exhibit a higher analytical sensitivity than the commercial graphite-based SPE, with a 4-fold improvement observed. These results open up the possibility of using high-performing CNO-based SPEs for electrochemical applications including sensors, battery electrodes and electrocatalysis. View Full-Text
Keywords: carbon nano-onion; ink formulation; screen-printed electrode; carbon nanomaterial; dopamine carbon nano-onion; ink formulation; screen-printed electrode; carbon nanomaterial; dopamine
Show Figures

Graphical abstract

MDPI and ACS Style

Cumba, L.R.; Camisasca, A.; Giordani, S.; Forster, R.J. Electrochemical Properties of Screen-Printed Carbon Nano-Onion Electrodes. Molecules 2020, 25, 3884.

AMA Style

Cumba LR, Camisasca A, Giordani S, Forster RJ. Electrochemical Properties of Screen-Printed Carbon Nano-Onion Electrodes. Molecules. 2020; 25(17):3884.

Chicago/Turabian Style

Cumba, Loanda R., Adalberto Camisasca, Silvia Giordani, and Robert J. Forster. 2020. "Electrochemical Properties of Screen-Printed Carbon Nano-Onion Electrodes" Molecules 25, no. 17: 3884.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop