Corrigendum to “Unmodified and multi-walled carbon nanotube modified tetrahedral amorphous carbon (ta-C) films as in vivo sensor materials for sensitive and selective detection of dopamine” [Bios. Bioelectron. 118 (2018) 23–30]

Palomäki, Tommi; Peltola, Emilia; Sainio, Sami; Pitkänen, Olli; Kordás, Krisztián; Laurila, Tomi

doi:10.1016/j.bios.2018.08.053

Cited by 7 publications

(3 citation statements)

References 180 publications

(317 reference statements)

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“…The characteristics such as large surface area, high electrical conductivity and ability to catalyze redox reactions, [1][2][3][4] make CNTs an attractive material for electrochemical sensors. In fact, we have shown that as-fabricated pristine CNTs are a suitable material for the detection of neurotransmitter dopamine [5,6] and analgesics such as oxycodone, [7] fentanyl, [8] morphine and codeine. [9] The main methods for fabricating CNTs are chemical vapor deposition, electric discharge and laser ablation, where transition metal particles (Co, Fe, Ni) are used for catalyzing the growth of CNTs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrochemical Oxidation on Physicochemical Properties of Fe‐Containing Single‐Walled Carbon Nanotubes

et al. 2020

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Metal catalysts are necessary for fabricating carbon nanotubes, but are often considered impurities in the end products, and arduous steps are used to remove catalyst residues from the nanotube structure. However, as metals can be electrocatalytic, instead of removing them we can utilize their role in detection of analgesics. Herein, we study the physicochemical properties of Fe-containing single-walled carbon nanotubes (SWCNTs), and the effect of simple oxidative pretreatment on them. We show that a gentle anodic pretreatment i) increased the amount of oxidized Fe nanoparticles, most likely exhibiting phases Fe 3 O 4 and Fe 2 O 3 and ii) effectively removed disordered carbonaceous material from SWCNT bundles surfaces. Pretreatment had only a marginal effect on sensitivity towards analgesics. However, interestingly, selectivity of Fe-SWCNTs towards paracetamol and morphine could be modified with pretreatment. Through this kind of in-depth investigation, we can, to a certain extent, correlate various material properties of SWCNTs with the observed electrochemical performance. This approach allows us to evaluate what factors in SWCNTs truly affect the electrochemical detection of biomolecules.

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Section: Introductionmentioning

confidence: 99%

Effect of Electrochemical Oxidation on Physicochemical Properties of Fe‐Containing Single‐Walled Carbon Nanotubes

et al. 2020

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“…CoPc has rich redox chemistry with high electron-transfer ability, and has been widely used to fabricate sensors because of its excellent electrocatalytic activity for many compounds [34][35][36]. MWCNTs consist of several nanotubes (with diameters ranging from 5 to 50 nm) composed of graphene sheets nested within one another, and they are widely recognized as the optimal skeleton for modification [37][38][39][40]. MWCNTs-COOH are easily dispersed in organic solvents, which improves the homogeneity of the MWCNTs-COOH within the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Nonenzymatic Lactic Acid Detection Using Cobalt Polyphthalocyanine/Carboxylated Multiwalled Carbon Nanotube Nanocomposites Modified Sensor

2022

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In this study, a novel cobalt polyphthalocyanine/carboxylic acid functionalized multiwalled carbon nanotube nanocomposite (CoPPc/MWCNTs-COOH) to detect lactic acid was successfully fabricated. The nanocomposite was systematically characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, ultraviolet–visible absorption spectroscopy, and X-ray photoelectron spectroscopy. The nanocomposite provided excellent conductivity for effective charge transfer and avoided the agglomeration of MWCNTs-COOH. The electrochemical surface area, diffusion coefficient and electron transfer resistance of the CoPPc/MWCNTs-COOH glassy carbon electrode (CoPPc/MWCNTs-COOH/GCE) were calculated as A = 0.49 cm2, D = 9.22 × 10−5 cm2/s, and Rct = 200 Ω, respectively. The lactic acid sensing performance of the CoPPc/MWCNTs-COOH was evaluated using cyclic voltammetry in 0.1 M PBS (pH 4). The results demonstrated that the novel electrode exhibited excellent electrochemical performance toward lactic acid reduction over a wide concentration range (10 to 240 μM), with a low detection limit (2 μM (S/N = 3)), and a reasonable selectivity against various interferents (ascorbic acid, uric acid, dopamine, sodium chloride, glucose, and hydrogen peroxide). Additionally, the electrode was also successfully applied to quantify lactic acid in rice wine samples, showing great promise for rapid monitoring applications.

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“…Both highly sp 2 ‐bonded, graphitic, and sp 3 ‐bonded, diamond‐like amorphous carbon materials exhibit attractive properties in electroanalytical applications . While the use of mainly sp 2 ‐bonded carbon materials such as glassy carbon has been long established , moderately or highly sp 3 ‐bonded carbon materials such as a‐C and tetrahedral amorphous carbon (ta‐C) are more recent and present lower background currents and wider working potential windows that are useful in the detection of very low concentrations of analytes . Amorphous carbon films also show good cell viability allowing for possible implantation of such electrochemical sensors in vivo .…”

Section: Introductionmentioning

confidence: 99%

Effect of Power Density on the Electrochemical Properties of Undoped Amorphous Carbon (a‐C) Thin Films

et al. 2019

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Undoped a‐C thin films were deposited with varying power density from 10 to 25 W/cm2 using unbalanced closed‐field magnetron sputtering (CFUBMS). The effect of power density on the physical and electrochemical properties was investigated by experimental characterization methods and atomistic simulations. XPS indicated that the films were composed mostly of sp2‐bonded carbon (55–58 at.%) with a small amount of oxygen (8–9 at.%) in the surface region. The films appeared completely amorphous in XRD. The ID/IG ratio obtained by Raman spectroscopy indicated an increase from 1.76 to 2.34 with power density. The experimental and simulated data suggested a possible ordering and/or clustering of the sp2 phase with power density as the cause of the improved electrical properties of the a‐C films. The electrochemical properties of a‐C were between those of glassy carbon and tetrahedral amorphous carbon with potential windows ranging from 2.77 to 2.93 V and double‐layer capacitance values around 0.90 μF cm−2. Electron transfer for Ru(NH3)63+/2+ and FcMeOH+1/0 was reversible whereas that for IrCl62−/3− was quasi‐reversible. Peak potential separation of dopamine and oxidation potential of ascorbic acid decreased with power density, correlating with the structural and electrical changes of the films. The a‐C thin films deposited by CFUBMS are inherently conductive and their physical properties can be adjusted by varying the deposition parameters to a wide range of electrochemical applications.

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Corrigendum to “Unmodified and multi-walled carbon nanotube modified tetrahedral amorphous carbon (ta-C) films as in vivo sensor materials for sensitive and selective detection of dopamine” [Bios. Bioelectron. 118 (2018) 23–30]

Cited by 7 publications

References 180 publications

Effect of Electrochemical Oxidation on Physicochemical Properties of Fe‐Containing Single‐Walled Carbon Nanotubes

Effect of Electrochemical Oxidation on Physicochemical Properties of Fe‐Containing Single‐Walled Carbon Nanotubes

Nonenzymatic Lactic Acid Detection Using Cobalt Polyphthalocyanine/Carboxylated Multiwalled Carbon Nanotube Nanocomposites Modified Sensor

Effect of Power Density on the Electrochemical Properties of Undoped Amorphous Carbon (a‐C) Thin Films

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