Selective sensing of cysteine on manganese dioxide nanowires and chitosan modified glassy carbon electrodes

Bai, Yu-Hui; Xu, Jing‐Juan; Chen, Hong‐Yuan

doi:10.1016/j.bios.2009.03.008

Cited by 109 publications

(33 citation statements)

References 40 publications

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“…As an example of a practical use, we also detected L-CySH in the presence of [13,45]. The result demonstrates that this is a two-proton and one electron reaction process on the electrode surface.…”

Section: Detection Of L-cysh In Real Samplesmentioning

confidence: 67%

“…In addition to a series of carbon electrodes [1,15,21], the mechanism is also used to explain the electrochemical oxidation process of L-CySH at other modified electrodes based on transition metal and its compounds, such as MnO2 [13], MnO2-C [43], MoS2 [45], CoPc [48] and so on. Thus, the described mechanism above applies equally to MoN/N-MWNTs modified electrodes.…”

Section: Detection Of L-cysh In Real Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Molybdenum nitride/nitrogen-doped multi-walled carbon nanotubes hybrid nanocomposites as novel electrochemical sensor for detection l-cysteine

Geng

et al. 2016

Sensors and Actuators B: Chemical

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Section: Detection Of L-cysh In Real Samplesmentioning

confidence: 67%

Section: Detection Of L-cysh In Real Samplesmentioning

confidence: 99%

Molybdenum nitride/nitrogen-doped multi-walled carbon nanotubes hybrid nanocomposites as novel electrochemical sensor for detection l-cysteine

Geng

et al. 2016

Sensors and Actuators B: Chemical

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“…Therefore, + 0.3 V was selected as the applied potential for the photoelectrochemical determination of cysteine. The potential for photoelectrochemical oxidation of cysteine at the TCPP-ZnO-modified ITO electrode was more negative than those of + 0.57 V at the boron-doped diamond electrode in alkaline media, [46] + 0.5 V at the bMnO 2 -nanowire-modified glassy carbon electrode (GCE) in alkaline media, [49] + 0.75 V at the gallium nitride nanowire electrode, [50] and + 0.35 V at the ordered mesoporouscarbon-modified glassy carbon electrode in acidic media. [48] The low applied potential was beneficial to the elimination of interference from other reductive species that coexisted in the samples.…”

Section: Ftir Analysis Of Tcpp-znomentioning

confidence: 99%

“…[46][47][48][49][50] The main problem of the electrochemical methods is the high overpotential for oxidation of cysteine. [46,48,49] In this work, cysteine was used as an analyte model of the biosensing platform. It acted as an electron donor at relatively low potential to capture the hole of the excited 4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis(-benzoic acid) (TCPP), which then injects the photoexcitation electron into the conduction band (CB) of ZnO nanoparticles to induce the electron transfer to the ITO electrode, thus leading to an enhanced photocurrent signal and a novel photoelectrochemical biosensor for cysteine (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemistry of Free‐Base‐Porphyrin‐Functionalized Zinc Oxide Nanoparticles and Their Applications in Biosensing

Lei

Wang

et al. 2011

Chemistry A European J

158

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The photoelectrochemical properties of free-base-porphyrin-functionalized zinc oxide nanoparticles were studied. A universal photoelectrochemical biosensing platform was constructed on indium tin oxide (ITO) by using the functional nanohybrid. The nanohybrid was synthesized by means of dentate binding of ZnO nanoparticles with carboxylic groups of 4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid) (TCPP), and characterized with scanning electron microscopy, contact angle measurement, and spectral techniques. The nanohybrid-coated ITO electrode showed an efficient photocurrent response under irradiation at a wavelength of 360 nm, which could be greatly improved upon addition of cysteine by its oxidation at +0.3 V. The possible mechanism was that cysteine acts as a sacrificial electron donor to scavenge the photogenerated holes that locate on the excited state of TCPP, which then injects the photoexcitation electrons into the conduction band of ZnO nanoparticles, thereby transferring photoinduced electrons to the ITO electrode. Based on this enhanced photocurrent signal, a novel method for photoelectrochemical detection of cysteine was developed with a linear range of 0.6 to 157 μmol L(-1) in physiological media. The detection limit was 0.2 μmol L(-1) at a signal-to-noise ratio of 3. The novel strategy of cysteine analysis could provide an alternative method for monitoring biomolecules and extend the application of porphyrin-functionalized semiconductor nanoparticles.

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“…However, the poor electrical conductivity has hindered its broad applications in electrochemical sensors, due to the semiconductor property of itself [26]. Hence, much effort has been devoted to composite or hybrid nano-MnO 2 with conductive components, aiming to enhance electrical conductivity, decrease charge transfer resistance, and eventually improve sensing performances [20,21,29]. Graphene, an emerging 2D carbon nanomaterial, has become one of the most preferred electrode modification materials due to its large surface area, high electrical conductivity, and rapid heterogeneous electron transfer rate [27,30,31].…”

Section: Introductionmentioning

confidence: 99%

Morphologically Tunable MnO2 Nanoparticles Fabrication, Modelling and Their Influences on Electrochemical Sensing Performance toward Dopamine

Liu

et al. 2018

Catalysts

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Abstract:The morphology or shape of nanomaterials plays an important role in functional applications, especially in the electrochemical sensing performance of nanocomposites modified electrodes. Herein, the morphology-dependent electrochemical sensing properties of MnO 2 -reduced graphene oxide/glass carbon electrode (MnO 2 -RGO/GCE) toward dopamine detection were investigated. Firstly, various morphologies of nanoscale MnO 2 , including MnO 2 nanowires (MnO 2 NWs), MnO 2 nanorods (MnO 2 NRs), and MnO 2 nanotubes (MnO 2 NTs), were synthesized under different hydrothermal conditions. Then the corresponding MnO 2 -RGO/GCEs were fabricated via drop-casting and the subsequent electrochemical reduction method. The oxidation peak currents increase with the electrochemical activity area following the order of MnO 2 NWs-RGO/GCE, MnO 2 NTs-RGO/GCE, and MnO 2 NRs-RGO/GCE. The spatial models for MnO 2 NWs, MnO 2 NTs, and MnO 2 NRs are established and accordingly compared by their specific surface area, explaining well the evident difference in electrochemical responses. Therefore, the MnO 2 NWs-RGO/GCE is selected for dopamine detection due to its better electrochemical sensing performance. The response peak current is found to be linear with dopamine concentration in the range of 8.0 × 10 −8 mol/L-1.0 × 10 −6 mol/L and 1.0 × 10 −6 mol/L-8.0 × 10 −5 mol/L with a lower detection limit of 1 × 10 −9 mol/L (S/N = 3). Finally, MnO 2 NWs-RGO/GCE is successfully used for the determination of dopamine injection samples, with a recovery of 99.6-103%. These findings are of great significance for understanding the relationship between unlimited nanoparticle structure manipulation and performance improvement.

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Selective sensing of cysteine on manganese dioxide nanowires and chitosan modified glassy carbon electrodes

Cited by 109 publications

References 40 publications

Molybdenum nitride/nitrogen-doped multi-walled carbon nanotubes hybrid nanocomposites as novel electrochemical sensor for detection l-cysteine

Molybdenum nitride/nitrogen-doped multi-walled carbon nanotubes hybrid nanocomposites as novel electrochemical sensor for detection l-cysteine

Photoelectrochemistry of Free‐Base‐Porphyrin‐Functionalized Zinc Oxide Nanoparticles and Their Applications in Biosensing

Morphologically Tunable MnO2 Nanoparticles Fabrication, Modelling and Their Influences on Electrochemical Sensing Performance toward Dopamine

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