Electrochemical behavior of dye-linked L-proline dehydrogenase on glassy carbon electrodes modified by multi-walled carbon nanotubes

Zheng, Hongxing; Lin, Leyi; Okezaki, Yosuke; Kawakami, Retsuo; Sakuraba, Haruhiko; Ohshima, Toshihisa; Takagi, Keiichi; Suye, Shin‐ichiro

doi:10.3762/bjnano.1.16

Cited by 11 publications

(5 citation statements)

References 35 publications

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“…On the other hand, there is no well-defined reduction peak for Cr(VI) at the Ox.MWCNT-Au nano -modified electrode. Again, the broad redox pair at about 0.20-0.30 V versus SCE, which is now more pronounced, is probably related to oxygen functionalities [33]. It appears that this broad wave combined with the high capacitance masks the Cr(VI) peak.…”

Section: Electrochemical Detection Of Cr(vi)mentioning

confidence: 92%

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Electrochemical detection of Cr(VI) with carbon nanotubes decorated with gold nanoparticles

2018

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A nanocomposite consisting of gold nanoparticles deposited on the side walls of functionalised multi-walled carbon nanotubes, Ox-MWCNT-Au nano , was prepared using a simple chemical reduction. The nanoparticles were well dispersed with a mean diameter of 7.5 nm and had a face-centred cubic structure and a gold loading between 2.0% and 2.6% by weight. These gold decorated nanotubes were cast onto a gold electrode to form a uniform and homogeneous sensor. Using cyclic voltammetry, the reduction of Cr(VI) was observed at a peak potential of 0.52 V versus SCE in an acidified H 2 SO 4 solution, pH 2.0. A linear calibration curve with a sensitivity of 0.28 mA mM − 1 and a LOD of 7.2 × 10 − 7 M was obtained using constant potential amperometry coupled with rotating disc voltammetry. The electrochemical detection of Cr(VI) was also observed at a MWCNT-modified gold substrate but with a higher LOD, illustrating the advantage of combining the gold nanoparticles with MWCNTs. The sensor showed good selectivity for the detection of Cr(VI) in the presence of Cu(II), chloride and nitrates and in a real water sample. This was attributed to the electropositive reduction potentials of Cr(VI), the acidic H 2 SO 4 supporting electrolyte that provides a well-known cleaning effect at gold, and the size and good dispersion of the gold nanoparticles that minimise particle agglomeration.

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Section: Electrochemical Detection Of Cr(vi)mentioning

confidence: 92%

“…Other redox peaks are visible at 0.40 V versus SCE and these resemble an adsorbed redox couple. Zheng et al [33] have attributed these redox waves to oxygen-containing functional groups on the MWCNTs. On the other hand, there is no well-defined reduction peak for Cr(VI) at the Ox.MWCNT-Au nano -modified electrode.…”

Section: Electrochemical Detection Of Cr(vi)mentioning

confidence: 99%

Electrochemical detection of Cr(VI) with carbon nanotubes decorated with gold nanoparticles

2018

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“…A pair of well-defined redox peaks is observed with oxidation at -0.044 V and reduction at +0.021 V at the MWCNTs-modified GCE (cyclic voltammogram a). This is owing to the oxidation/reduction of some functional groups on the surface of MWCNTs [7]. The large current response indicated an increased electrode surface or a fast electron process after modification by MWCNTs.…”

Section: Electrochemistry Of Mwcnts-modified Gcementioning

confidence: 98%

The Application of Glassy Carbon Electrode Modified by Multi-Walled Carbon Nanotubes for the Fast Determination of Hydroquinone in Wastewater

Zhao

Yang³

et al. 2014

AMR

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A novel multi-walled carbon nanotubes (MWCNTs)-modified glassy carbon electrode (GCE) with excellent stability, repeatability and anti-interference was synthesized and it exhibited an electrocatalytic signal for hydroquinone (HQ) compared to bare GCE, which suggested that the presence of MWCNTs efficiently enhances electron transfer. Various parameters such as pH, modifier volume, and scan rate were optimized using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. Under optimum conditions, linear responses for HQ in 0.1mol·L-1 phosphate buffer solution of pH 6.0 were obtained in the range of 5×10-6 mol·L-1 to 2×10-4 mol·L-1 with detection limits of 2.7×10-6 mol·L-1 (signal-to-noise ratio of 3). Such MWCNTs-modified GCE was successfully applied for the determination of hydroquinone in simulated water samples and can be developed for the the detection of HQ.

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“…[59] To further enhance the effect of cisplatin on DNA upon ionizing radiation, Zheng et al modified the PtÀDNA complex with gold nanoparticles (AuNP) and irradiated them with highenergye lectrons. [60,61] They have shown that the binding of one AuNP can result in an additional enhancement of DSBs by afactor of 3-7.5. [60] In the followingsection we shortly describe the role of NPsinradiosensitization.…”

Section: Cisplatin and Derivativesmentioning

confidence: 99%

The Physico‐Chemical Basis of DNA Radiosensitization: Implications for Cancer Radiation Therapy

Schürmann

Vogel

Ebel

et al. 2018

Chemistry A European J

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High-energy radiation is used in combination with radiosensitizing therapeutics to treat cancer. The most common radiosensitizers are halogenated nucleosides and cisplatin derivatives, and recently also metal nanoparticles have been suggested as potential radiosensitizing agents. The radiosensitizing action of these compounds can at least partly be ascribed to an enhanced reactivity towards secondary low-energy electrons generated along the radiation track of the high-energy primary radiation, or to an additional emission of secondary reactive electrons close to the tumor tissue. This is referred to as physico-chemical radiosensitization. In this Concept article we present current experimental methods used to study fundamental processes of physico-chemical radiosensitization and discuss the most relevant classes of radiosensitizers. Open questions in the current discussions are identified and future directions outlined, which can lead to optimized treatment protocols or even novel therapeutic concepts.

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Electrochemical behavior of dye-linked L-proline dehydrogenase on glassy carbon electrodes modified by multi-walled carbon nanotubes

Cited by 11 publications

References 35 publications

Electrochemical detection of Cr(VI) with carbon nanotubes decorated with gold nanoparticles

Electrochemical detection of Cr(VI) with carbon nanotubes decorated with gold nanoparticles

The Application of Glassy Carbon Electrode Modified by Multi-Walled Carbon Nanotubes for the Fast Determination of Hydroquinone in Wastewater

The Physico‐Chemical Basis of DNA Radiosensitization: Implications for Cancer Radiation Therapy

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