A lab-made screen-printed electrode as a platform to study the effect of the size and functionalization of carbon nanotubes on the voltammetric determination of caffeic acid

Araújo, Diele A.G.; Camargo, Jéssica Rocha; Pradela‐Filho, Lauro A.; Lima, Ana P.; Muñoz, Rodrigo A.A.; Takeuchi, Regina M.; Janegitz, Bruno C.; Santos, André L.

doi:10.1016/j.microc.2020.105297

Cited by 57 publications

(30 citation statements)

References 46 publications

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“…Table S3 shows the electrochemical responses of the composites from the same batch were reproducible (RSD = 10%) since the sensitivities of the sensors were not significantly compromised by using different electrodes. RSD close to this estimated value was reported in the literature for other types of carbon composites, 1,8,26,45,46 demonstrating the proposed material has acceptable reproducibility. The batch‐to‐batch reproducibility was poorer (RSD = 15%).…”

Section: Resultssupporting

confidence: 85%

“…Figure 3A shows a comparison between the cyclic voltammograms for the materials prepared in different compositions. Typical voltammetric peaks attributed to the electrochemical probe 26 are observed in Figure 3A. Δ E p values decreased by increasing the graphite percentages (Figure 3B).…”

Section: Resultsmentioning

confidence: 99%

“…Ferrocyanide ion was used as an electrochemical probe and the best materials were selected in terms of electroanalytical performance. The proposed sensors are produced as flexible materials with different sizes and shapes, making them easily adaptable for miniaturized or microfluidic systems, which are considered trends in the electroanalytical field 26,27 . In addition, the proposed materials are also great candidates to be explored as electrochemical sensors for 3D‐printed portable electrochemical cells, replacing conventional GCEs and graphite sheets 28–30 .…”

Section: Introductionmentioning

confidence: 99%

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Low‐cost conductive films based on graphite and cellulose acetate as promising electroanalytical platforms

Paixão

Souza

Pradela‐Filho

et al. 2021

Polymers for Advanced Techs

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Conducting films were produced by incorporating 35, 50, and 60 wt.%. of graphite in cellulose acetate. The graphite contents showed to be of pivotal importance to the properties of the materials, mainly on the electrochemical performance. Thermal analyses indicated the graphite hinders the crystallization process of cellulose acetate and increases the hydrophobicity of the films. Scanning electron microscopy provided evidence of laminated graphite structures well‐dispersed in the polymeric matrix and exhibited a more porous aspect surface for the 50% G/Composite, which led to a higher surface area obtained by the N2 adsorption/desorption technique. This composite also had a better electrochemical response for ferrocyanide ion. The fabrication method was reproducible, which was associated with the structural uniformity of the resulting material. In addition, the conductive films are ready to use after production, precluding the need for any surface pretreatment. Moreover, the proposed sensor showed analytical potentiality for dopamine and hydroquinone determination, extending the possibilities for new electroanalytical applications.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low‐cost conductive films based on graphite and cellulose acetate as promising electroanalytical platforms

Paixão

Souza

Pradela‐Filho

et al. 2021

Polymers for Advanced Techs

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“…To develop conductive inks, a compound with conductive characteristics must be dispersed in a polymeric medium that will be responsible for the adhesion to the substrate [ 4 , 14 ]. Polymeric compounds, such as shellac and nail polish, have been properly employed for this purpose [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. Nail polish [ 11 ] is a polymer that has proved to be excellent for the development of conductive inks, mainly because it is already developed to come into contact with nails without causing harm to human health.…”

Section: Introductionmentioning

confidence: 99%

Development of New Simple Compositions of Silver Inks for the Preparation of Pseudo-Reference Electrodes

Camargo

Fernandes-Junior

Azzi³

et al. 2022

Biosensors

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Silver materials are known to present excellent properties, such as high electrical and thermal conductivity as well as chemical stability. Silver-based inks have drawn a lot of attention for being compatible with various substrates, which can be used in the production uniform and stable pseudo-reference electrodes with low curing temperatures. Furthermore, the interest in the use of disposable electrodes has been increasing due to the low cost and the possibility of their use in point-of-care and point-of-need situations. Thus, in this work, two new inks were developed using Ag as conductive material and colorless polymers (nail polish (NP) and shellac (SL)), and applied to different substrates (screen-printed electrodes, acetate sheets, and 3D-printed electrodes) to verify the performance of the proposed inks. Measurements attained with open circuit potential (OCP) attested to the stability of the potential of the pseudo-reference proposed for 1 h. Analytical curves for β-estradiol were also obtained using the devices prepared with the proposed inks as pseudo-references electrodes, which presented satisfactory results concerning the potential stability (RSD < 2.6%). These inks are simple to prepare and present great alternatives for the development of pseudo-reference electrodes useful in the construction of disposable electrochemical systems.

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“…The proposed sensor presented similar limits for detection of those using graphite-based inks or using low-cost binders, such as nail polish [ 16 ] and glass varnish [ 17 ]. Hence, the use of other carbon materials in ink composition like multiwalled carbon nanotubes (MWCNT) [ 31 ], reduced graphene nanoribbons (rGNRs) [ 32 ], and commercial available carbon inks [ 33 ] may offer lower LODs and improved sensitivity for paper-based sensors.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of paper-based analytical devices using a PLA 3D-printed stencil for electrochemical determination of chloroquine and escitalopram

Silva

Sousa

Simões

et al. 2021

J Solid State Electrochem

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A lab-made screen-printed electrode as a platform to study the effect of the size and functionalization of carbon nanotubes on the voltammetric determination of caffeic acid

Cited by 57 publications

References 46 publications

Low‐cost conductive films based on graphite and cellulose acetate as promising electroanalytical platforms

Low‐cost conductive films based on graphite and cellulose acetate as promising electroanalytical platforms

Development of New Simple Compositions of Silver Inks for the Preparation of Pseudo-Reference Electrodes

Fabrication of paper-based analytical devices using a PLA 3D-printed stencil for electrochemical determination of chloroquine and escitalopram

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