One step electrochemical deposition and reduction of graphene oxide on screen printed electrodes for impedance detection of glucose

Li, Shuang; Zhang, Qian; Lu, Yanli; Ji, Daizong; Zhang, Diming; Wu, Jiajia; Chen, Xing; Liu, Qingjun

doi:10.1016/j.snb.2016.12.142

Cited by 45 publications

(25 citation statements)

References 52 publications

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“…In the latest years, several pretreatment procedures for the SPCE surface aiming to improve the sensitivity and reproducibility of the results have been reported [43][44][45][46][47][48][49][50]. Improvement of the electrochemical performance of screen-printed carbon electrodes by UV/ozone modification was very recently described [43].…”

Section: Introductionmentioning

confidence: 99%

“…This improvement was explained by a substantial removal of the organic binder, inducing a clear exposure of the micrometer-sized graphite particles at the electrode surface [49]. Several approaches for improving the voltammetric behavior of SPCEs, presented as activation or electrochemical cleaning procedures, consisted in repetitive cyclic voltammograms in various media: in diluted H 2 O 2 from +1.0 to −0.7 [48], in phosphate buffer solutions from −0.6 to +1.6 V [49], or only by applying anodic potentials ranging from +0.2 V to +2 V [47]. However, for all these electrochemical procedures, no reproducibility studies have been reported and the improvement in the response was presented either as a reduction of the semicircle in the Nyquist plot at the pre-treated SPCE [49] or as a narrower peak-to-peak separation (no ∆Ep values) of the recorded voltammograms [46] for the reporter redox probes.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Graphene Oxide Concentration when Fabricating an Electrochemical Biosensor for DNA Detection

et al. 2019

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We have investigated the influence exerted by the concentration of graphene oxide (GO) dispersion as a modifier for screen printed carbon electrodes (SPCEs) on the fabrication of an electrochemical biosensor to detect DNA hybridization. A new pretreatment protocol for SPCEs, involving two successive steps in order to achieve a reproducible deposition of GO, is also proposed. Aqueous GO dispersions of different concentrations (0.05, 0.1, 0.15, and 0.2 mg/mL) were first drop-cast on the SPCE substrates and then electrochemically reduced. The electrochemical properties of the modified electrodes were investigated after each modification step by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), while physicochemical characterization was performed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Finally, the sensing platform was obtained by the simple adsorption of the single-stranded DNA probe onto the electrochemically reduced GO (RGO)-modified SPCEs under optimized conditions. The hybridization was achieved by incubating the functionalized SPCEs with complementary DNA target and detected by measuring the change in the electrochemical response of [Fe(CN)6]3–/4– redox reporter in CV and EIS measurements induced by the release of the newly formed double-stranded DNA from the electrode surface. Our results showed that a higher GO concentration generated a more sensitive response towards DNA detection.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Graphene Oxide Concentration when Fabricating an Electrochemical Biosensor for DNA Detection

et al. 2019

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“…Approximately a straight line was observed in case of rGO/GCE which represents a mass diffusion limiting electron transfer process. These results show a higher rate of electron transfer process of [Fe (CN)6] 3-/4on the rGO/GCE [12].…”

Section: Results and Discussion:-mentioning

confidence: 62%

“…2 demonstrates that CVs of bare GCE and rGO/GCE, electrodes were monitored in freshly prepared 1 M [Fe(CN)6] 3-/4-(1:1) solution containing 0.1 M KCl at a scan rate of 100 mV s -1 . It can be examined that a well-defined redox couple peaks appeared at bare electrode [12]. After the modification of electrode was coated with rGO, the redox peak currents were much improved due to superior electron conduction ability of rGO as shown in Fig.2.…”

Section: Results and Discussion:-mentioning

confidence: 94%

Electrochemical Detection of Picric Acid Using Glassy Carbon Electrode Modified Reduced Graphene Oxide by Single-Drop Microextraction Method.

Ihuomah¹,

Ihuoma²,

Sonaimuthu³

2018

IJAR

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The reduced graphene oxide composite-modified glassy carbon electrode (rGO/GCE) was developed as a simple, selective and sensitive electrochemical sensor for determination of picric acid (PA). The rGO was obtained by reduction of graphene oxide obtained via Hummer's method. The synthesised rGO was characterized using Fourier transform infrared spectroscopy (FTIR) and transmission Electron microscopy (TEM). GCE was modified with rGO and the electrochemical properties of the bare and modified electrode were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results obtained showed that the modified electrode exhibited more excellent electrochemical properties than the bare GCE. The optimum conditions for detection of PA in water using CV and EIS were as follows: deposition potential at 100 mV/s, pH 2, and 0.5 M H 2 SO 4 was used as supporting electrolyte. The linear regression equation obtained was I (μA) = 0.6432C + 7.2359 and the detection limit were calculated to be 0.65 μg L −1 .

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“…In the past decade printing has advanced to an enabling technology in many fields of science and engineering (Berthuy et al, 2016;Kastner et al, 2017;Li et al, 2016;Wittbrodt and Pearce, 2017). This trend has also arrived in pharmaceutical manufacturing research since printing of medicines has some specific advantages over other technologies (Boehm et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Pharmaceutical-grade oral films as substrates for printed medicine

Wimmer-Teubenbacher

Planchette

Pichler

et al. 2018

International Journal of Pharmaceutics

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In contact-less printing, such as piezo-electric drop on demand printing used in the study, the drop formation process is independent of the substrate. This means that having developed a printable formulation, printed pharmaceutical dosage forms can be obtained on any pharmaceutical grade substrate, such as polymer-based films. In this work we evaluated eight different oral films based on their suitability as printing substrates for sodium picosulfate. The different polymer films were compared regarding printed spot morphology, chemical stability and dissolution profile. The morphology of printed sodium picosulfate was investigated with scanning electron microscopy and optical coherence tomography. The spreading of the deposited drops was found to be governed by the contact angle of the ink with the substrate. The form of the sodium picosulfate drops changed on microcrystalline cellulose films at ambient conditions over 8 weeks and stayed unchanged on other tested substrates. Sodium picosulfate remained amorphous on all substrates according to small and wide angle X-ray scattering, differential scanning calorimetry and polarized light microscopy measurements. The absence of chemical interactions between the drug and substrates, as indicated by infrared spectroscopy, makes all tested substrates suitable for printing sodium picosulfate onto them.

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One step electrochemical deposition and reduction of graphene oxide on screen printed electrodes for impedance detection of glucose

Cited by 45 publications

References 52 publications

Influence of Graphene Oxide Concentration when Fabricating an Electrochemical Biosensor for DNA Detection

Influence of Graphene Oxide Concentration when Fabricating an Electrochemical Biosensor for DNA Detection

Electrochemical Detection of Picric Acid Using Glassy Carbon Electrode Modified Reduced Graphene Oxide by Single-Drop Microextraction Method.

Pharmaceutical-grade oral films as substrates for printed medicine

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