Please use this identifier to cite or link to this item: http://hdl.handle.net/10662/6883
Title: Pencil it in: exploring the feasibility of hand-drawn pencil electrochemical sensors and their direct comparison to screen-printed electrodes
Authors: Bernalte Morgado, Elena María
Foster, Christopher W.
Brownson, Dale A.C.
Mosna, Morgane
Smith, Graham C.
Banks, Craig E.
Manchester Metropolitan University. UK
Universidad de Extremadura. Departamento de Química Analítica
University of Chester. UK
Keywords: Electrodos para dibujo a lápiz
Electrodos para serigrafía
Sensores
Electroquímica
Pencil-drawn electrodes
Screen-printed electrodes
Sensors
Electrochemistry
Issue Date: 2016
Publisher: MDPI
Abstract: We explore the fabrication, physicochemical characterisation (SEM, Raman, EDX and XPS) and electrochemical application of hand-drawn pencil electrodes (PDEs) upon an ultra-flexible polyester substrate; investigating the number of draws (used for their fabrication), the pencil grade utilised (HB to 9B) and the electrochemical properties of an array of batches (i.e, pencil boxes). Electrochemical characterisation of the PDEs, using different batches of HB grade pencils, is undertaken using several inner- and outer-sphere redox probes and is critically compared to screen-printed electrodes (SPEs). Proof-of-concept is demonstrated for the electrochemical sensing of dopamine and acetaminophen using PDEs, which are found to exhibit competitive limits of detection (3 σ) upon comparison to SPEs. Nonetheless, it is important to note that a clear lack of reproducibility was demonstrated when utilising these PDEs fabricated using the HB pencils from different batches. We also explore the suitability and feasibility of a pencil-drawn reference electrode compared to screen-printed alternatives, to see if one can draw the entire sensing platform. This article reports a critical assessment of these PDEs against that of its screen-printed competitors, questioning the overall feasibility of PDEs’ implementation as a sensing platform.
URI: http://hdl.handle.net/10662/6883
ISSN: 2079-6374
Appears in Collections:DQUAN - Artículos

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