Carbon Nanotubes and Their Potential Applications in Developing Electrochemical Biosensors for the Detection of Analytes in Food

Guadarrama-Fernández, Leonor; Mendoza-Madrigal, Angélica G.; Chanona-Pérez, Jorge; Robledo, Arturo Manzo; Calderón‐Domínguez, Georgina; Rius, F. Xavier; Blondeau, Pascal; Riu, Jordi

doi:10.1007/978-3-319-13596-0_14

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“…However, the film grown on sapphire shows the presence of a highly oriented (002) peak located at an angle 2θ 26.01°, indicating the formation of a single phase compound. L. Guadarrama-Fernández et al 39 have reported that the CNTs from the arc discharge are often covered with amorphous carbon, which contains metallic particles in the case of metal-carbon co-evaporation. The CNT peak grown on Ta and sapphire substrates matches well with the standard pattern of MWCNT.…”

Section: Resultsmentioning

confidence: 99%

Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H₂O₂ detection

Vijayalakshmi

Sivaraj

2016

Analyst

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In the present study, the properties of functionalized multiwalled carbon nanotube thin films deposited on Ta and AlO substrates were compared for better electrochemical sensing performance towards HO. We pioneer the fabrication of high quality carbon nanotubes by electron beam evaporation at a high vacuum of 10 mTorr. The fabricated films were further characterised using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and cyclic voltammetry (CV). Crystallographic properties revealed that the carbon nanotube (CNT) film grown on the AlO substrate exhibits a preferentially oriented (002) peak with high intensity compared to that on Ta. CNTs fabricated on a Ta substrate show better morphology with tightly packed grains and decreased nanotube diameter than the film on sapphire. TEM images confirmed the well adherent and dense nature of the nanotubes on Ta. Electrochemical HO sensors were constructed to demonstrate the sensing performance of CNT/Ta and CNT/sapphire electrodes. CV curves of the samples show high sensitivity for the MWCNT film grown on Ta due to the highly conductive acid resisting nature of the substrate, overcoming the obstacles to electrochemical HO sensing. Compared with the CNT/sapphire electrode, the CNT/Ta electrode exhibited high electrocatalytic activity towards the oxidation of HO, as distinct nanotubes are electrochemically linked with the conductive Ta substrate The CNTs on Ta revealed a very low detection limit of 0.07 μm due to the nanoporous morphology of the film which supported better penetration of electrolytes into the electrode material. The synergetic electrocatalytic effect of the CNT/Ta electrode with excellent redox chemistry is promising for the development of highly sensitive biosensors.

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Section: Resultsmentioning

confidence: 99%

Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H₂O₂ detection

Vijayalakshmi

Sivaraj

2016

Analyst

View full text Add to dashboard Cite

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Carbon Nanotubes and Their Potential Applications in Developing Electrochemical Biosensors for the Detection of Analytes in Food

Cited by 1 publication

References 37 publications

Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H₂O₂ detection

Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H₂O₂ detection

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Carbon Nanotubes and Their Potential Applications in Developing Electrochemical Biosensors for the Detection of Analytes in Food

Cited by 1 publication

References 37 publications

Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H2O2 detection

Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H2O2 detection

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Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H₂O₂ detection

Substrate effect on the properties of functionalized multiwalled carbon nanotubes grown by e-beam evaporation for high performance H₂O₂ detection