Gold nanoparticles supported on multi-walled carbon nanotubes produced by biphasic modified method and dopamine sensing application

Caetano, Fábio R.; Felippe, Leticia B.; Zarbin, Aldo J. G.; Bergamini, Márcio F.; Marcolino‐Júnior, Luiz H.

doi:10.1016/j.snb.2016.11.096

Cited by 75 publications

(34 citation statements)

References 46 publications

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“…The CSF was prepared containing the majority of interferents present in real cerebrospinal fluids following the procedure reported in the literature . A stock solution of the standard with concentration of 1×10 −3 mol L −1 DOPAC (in CSF) was prepared for random additions to five separate runs each contained 10 mL solution of 5×10 −7 mol L −1 DOPAC (in PBS/pH 7.4).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of β‐Cyclodextrin/Glycine/Carbon Nanotubes Electrochemical Neurotransmitters Sensor – Application in Ultra‐sensitive Determination of DOPAC in Human Serum

et al. 2018

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In this work, an electrochemical sensor was constructed by applying two successive thin layers of glycine‐carbon nanotubes mixture and β‐cyclodextrin (CNTs‐Gly)/CD over glassy carbon electrode surface for some neurotransmitters determination. A host‐guest interaction between CD and neurotransmitters molecules is expected and resulted in enhanced sensitivity, selectivity and stability of sensor response. Other components of the sensor are crucial for the unique electrochemical response. Carbon nanotubes allowed large surface area for glycine distribution that provided hydrogen bonding to CD moieties and contributed to facilitated charge transfer. It was possible to determine 3,4‐dihydroxy phenyl acetic acid (DOPAC) in the linear range of 0.1 μmol L−1 to 80 μmol L−1 with detection limit of 9.40 nmol L−1, quantification limit of 31.5 nmol L−1 and sensitivity of 4.16 μA/μmol L−1. The proposed sensor was applied in synthetic cerebrospinal fluids samples using random standard addition method. Also, the proposed sensor was used to determine DOPAC in presence of common interferences and acceptable recovery results were achieved for its analysis in real blood serum. Figures of merit for (CNTs‐Gly)/CD composite in terms of precision, robustness, repeatability and reproducibility were reported.

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Section: Resultsmentioning

confidence: 99%

Fabrication of β‐Cyclodextrin/Glycine/Carbon Nanotubes Electrochemical Neurotransmitters Sensor – Application in Ultra‐sensitive Determination of DOPAC in Human Serum

et al. 2018

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“…An AuNP-multi walled carbon nano tube (MWCNT) nanocomposite-modified glassy carbon electrode (GCE) was used for sensing of DA in the presence of UA and AA in synthetic cerebrospinal fluid sample by square wave voltammetry (SWV). [31] This DA sensor exhibited a linear range between 0.48 μM to 5.7 μM, a LOD of 0.071 μM and limit of quantification of 0.24 μM. The synergic effect between AuNPs and MWCNTs provided a 7 % enlarged electroactive area for adsorption of dopamine, which in turn prohibited the oxidation of other interfering species.…”

Section: Metal Nanoparticles Supported On Cntsmentioning

confidence: 94%

“…AuNPs in colloidal suspension have been synthesized using different reducing agents such as sodium citrate (Na 3 C 6 H 5 O 7 ) and sodium borohydride (NaBH 4 ). An AuNP‐multi walled carbon nano tube (MWCNT) nanocomposite‐modified glassy carbon electrode (GCE) was used for sensing of DA in the presence of UA and AA in synthetic cerebrospinal fluid sample by square wave voltammetry (SWV) . This DA sensor exhibited a linear range between 0.48 μM to 5.7 μM, a LOD of 0.071 μM and limit of quantification of 0.24 μM.…”

Section: Electrochemical Sensing Of Da By Using Cnt‐based Materialsmentioning

confidence: 99%

“…The large active surface area of the AuNP/MWCNT electrode (1.12 cm 2 ) in comparison to a GCE (0.08 cm 2 ) electrode indicate the higher electrochemical activity of the modified electrode. The AuNP/MWCNT surface modification increases the electroactivity of GCE, which therefore significantly increases the electron transfer process of DA oxidation . A composite was formed by attaching AuNPs on the surfaces of Azure‐A (AZA) ‐supported CNTs for DA detection.…”

Section: Electrochemical Sensing Of Da By Using Cnt‐based Materialsmentioning

confidence: 99%

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Carbon‐Nanotube‐Based Materials for Electrochemical Sensing of the Neurotransmitter Dopamine

2018

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The development of new tools with outstanding performance for monitoring neurotransmitters is a challenging task in neuroscience. Electrochemical probes have attracted tremendous attention for the identification and quantification of neurotransmitters, owing to their demonstrated potential for quick response, real‐time measurements, elevated selectivity and sensitivity. In this Review, we have focused on the recent developments of carbon nanotube (CNT)‐based electrochemical sensors for dopamine detection. The use of CNTs is beneficial for this task, because of their high tensile strength, flexibility, good electrical conductivity, and low thermal expansion coefficient. Therefore, electrochemical sensing approaches with CNTs have opened the door for researchers working towards neurobiomedical applications.

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“…Additionally, the superficial incorporation of organic [22,23] and inorganic molecules [24,25], metallic nanoparticles [26], biomolecules [27][28][29], and the nanocomposites of conducting polymers and CNTs [30,31] can increase the field of applications of CNTs in electroanalytical issues.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Pesticide Monitoring at Environmental Samples Using Carbon Nanotubes-Based Electrochemical Sensors

Wong

Silva

Caetano

et al. 2017

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Carbon nanotubes have received enormous attention in the development of electrochemical sensors by promoting electron transfer reactions, decreasing the work overpotential within great surface areas. The growing concerns about environmental health emphasized the necessity of continuous monitoring of pollutants. Pesticides have been successfully used to control agricultural and public health pests; however, intense use can cause a number of damages for biodiversity and human health. In this sense, carbon nanotubes-based electrochemical sensors have been proposed for pesticide monitoring combining different electrode modification strategies and electroanalytical techniques. In this paper, we provide a review of the recent advances in the use of carbon nanotubes for the construction of electrochemical sensors dedicated to the environmental monitoring of pesticides. Future directions, perspectives, and challenges are also commented.

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Gold nanoparticles supported on multi-walled carbon nanotubes produced by biphasic modified method and dopamine sensing application

Cited by 75 publications

References 46 publications

Fabrication of β‐Cyclodextrin/Glycine/Carbon Nanotubes Electrochemical Neurotransmitters Sensor – Application in Ultra‐sensitive Determination of DOPAC in Human Serum

Fabrication of β‐Cyclodextrin/Glycine/Carbon Nanotubes Electrochemical Neurotransmitters Sensor – Application in Ultra‐sensitive Determination of DOPAC in Human Serum

Carbon‐Nanotube‐Based Materials for Electrochemical Sensing of the Neurotransmitter Dopamine

An Overview of Pesticide Monitoring at Environmental Samples Using Carbon Nanotubes-Based Electrochemical Sensors

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