Nanocarbon electrode prepared from oppositely charged nanoparticles and nanotubes for low-potential thiocholine oxidation

Celebańska, Anna; Filipiak, Marcin S.; Leśniewski, Adam; Jubete, Elena; Opałło, Marcin

doi:10.1016/j.electacta.2015.06.143

Cited by 8 publications

(8 citation statements)

References 43 publications

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“…A variety of nanostructures, like carbon nanotubes , quantum dots , gold nanoparticles , graphene oxide or carbon black exhibit such behaviour. Recently, we demonstrated that carbon nanoparticles (CNPs, functionalized with negatively charged phenylsulfonate groups) deposited on the ITO electrode either electrophoretically or by layer‐by‐layer (LbL) method , decrease the overpotential of TC oxidation by 0.6–0.8 V.…”

Section: Introductionmentioning

confidence: 72%

“…TMA‐CNP(12) and TMA‐CNP(24) electrodes exhibit lower peak potential, but also higher capacitive current what increases signal‐to‐noise ratio. A similar phenomenon was observed earlier for LbL electrode system consisting of CNPs and carbon nanotubes or for the electrode modified with electrophoretically deposited CNPs . The potential of TC oxidation at TMA‐CNP(6) was found to be 0.25 V vs. Ag|AgCl by hydrodynamic voltammetry (Figure b), similar to the LbL electrode made from oppositely charged carbon nanotubes and CNPs .…”

Section: Resultsmentioning

confidence: 99%

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Stripe‐shaped Electrochemical Biosensor for Organophosphate Pesticide

et al. 2018

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Detection of organophosphate pesticides is indispensable to improve the quality of the water and therefore required by the European Union law. Here, we propose a novel architecture of a pesticide biosensor where the enzyme and the electrode are placed into neighboring zones in the stripe form. This separation permits to use the optimal conditions for their immobilization resulting in undisrupted mechanical stability of the biosensor. The enzyme, acetylcholinesterase, generates thiocholine which is further oxidized at the carbon nanoparticles film electrode, exhibiting high electrocatalytic activity. The whole device was tested as a biosensor for malaoxon employing a wild or recombinant acetylcholinesterase. The latter allowed for incubation time decrease down to 10 minutes and lowered the detection limit to 0.25 nM. Moreover, the encapsulated enzyme activity was visualised by a scanning electrochemical microscopy.

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Section: Introductionmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Stripe‐shaped Electrochemical Biosensor for Organophosphate Pesticide

et al. 2018

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“…Electrocatalytic properties of phenylsuphonated CNPs were also demonstrated on the example of thiocholine oxidation on the electrode modified by electrophoresis 62 or LbL CNPs‐SWCNTs 44. The onset potential is decreased by few hundreds of milivolts and this makes good perspective of CNPs application in pesticide electrochemical biosensors.…”

Section: Electrocatalytic Properties Of Cnps Modified Electrodesmentioning

confidence: 85%

“…LbL technique was also applied when oppositely charged gold 38, 39 and carbon 40–43 nanoparticles were used as a linkers. Most recently successful preparation of film consisting negatively charged CNPs and single walled carbon nanotubes (SWCNTs) with functionalities bearing positive charge was reported 44. Such approach enabled preparation of three dimensional, conductive nanoparticulate film consisting two nanomaterials 38 or entirely carbon nanoparticulate film 40 with controlled electrochemically active surface area as monitored by slow electrochemical reaction (dioxygen reduction) current or capacitive current (Fig.…”

Section: Immobilization Of Cnps At the Electrode Surfacementioning

confidence: 99%

(Bio)electroanalytical Applications of Carbon Nanoparticles

Szot

Opałło

2015

Electroanalysis

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Most recent application of carbon nanoparticles in electroanalysis are rewieved. After brief introduction on a variety of carbon nanomaterials, the methods of functionalisation or doping of carbon nanoparticles are presented. Next the techniques of their immobilization on the electrode surface are reviewed with special emphasis on layer‐by‐layer deposition and polymer film encapsulation. Then electrochemical properties of carbon nanoparticulate electrodes are presented with the emphasis on their electrocatalytic behavior. Finally the works on bioelectrocatalytic carbon nanoparticulate electrodes modified with enzymes or other biomaterial are reviewed.

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“…Qualities like good surface area activity, machinability, high chemical stability, inertness, and commercial availability make it desirable for scientific purposes. ITO is widely applied in optoelectronics [4], mostly in light-emitting diodes [5], liquid crystal displays [6], solar cells [7], transistors [8], and gas sensors [9], but is also commonly used in electrochemistry for electroanalytic devices [10], sensing [11] and biosensing [12]. With high quality ITO being readily available commercially and methods for direct deposition already in use [13,14], the definition of patterns is still another potential bottleneck.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of ITO microelectrodes and electrode arrays using low-cost CO2 laser plotter

Valapil

Filipiak

Rekiel

et al. 2023

Preprint

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Excellent electronic and optical properties make indium tin oxide (ITO) an attractive electrode substrate. Despite the commercial availability of high-quality ITO and some low-cost methods for direct deposition being in use by now, the definition of patterns is still a concern. Putting its popularity and extensive usage aside, the manufacturing of ITO electrodes so far lacks a rapid, highly reproducible, flexible, cost-effective, easy patterning process that could surpass difficult, time-consuming techniques such as lithography. A cost-effective method based on CO2 laser irradiation for preparing ITO microelectrodes and electrode arrays is presented herein. Electrodes of different sizes and shapes were examined to identify the performance of the proposed methods. Direct ablation of the ITO layer was optimized for rectangular electrodes of 25, 50, and 100 µm width, while laser cutting of scotch tape stencils and subsequent wet etching were used to create circular electrodes with a diameter of 1.75mm. Together, both methods form a complete toolbox, which allows for low-cost and fast fabrication of ITO electrodes for wide variety of applications. A multielectrode array system consisting 8 of these circular electrodes was fashioned, fabricated, assembled and tested. The ITO electrodes were characterized electrochemically and as an example application they were used for monitoring anchoring behavior of HeLa and HepG2 cell cultures through cell-based electrochemical impedance technique.

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Nanocarbon electrode prepared from oppositely charged nanoparticles and nanotubes for low-potential thiocholine oxidation

Cited by 8 publications

References 43 publications

Stripe‐shaped Electrochemical Biosensor for Organophosphate Pesticide

Stripe‐shaped Electrochemical Biosensor for Organophosphate Pesticide

(Bio)electroanalytical Applications of Carbon Nanoparticles

Fabrication of ITO microelectrodes and electrode arrays using low-cost CO2 laser plotter

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