Behaviour of Zinc Complexes and Zinc Sulphide Nanoparticles Revealed by Using Screen Printed Electrodes and Spectrometry

Nejdl, Lukáš; Ruttkay-Nedecký, Branislav; Kudr, Jiří; Kremplová, Monika; Cernei, Natalia; Prášek, Jan; Konečná, Marie; Hubálek, Jaromír; Zítka, Ondřej; Kynický, Jindřích; Kopel, Pavel; Kizek, René; Adam, Vojtěch

doi:10.3390/s131114417

Cited by 15 publications

(8 citation statements)

References 66 publications

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“…Nanometric compounds can adsorb biomolecules strongly and play an important role in the immobilization of biomolecules in biosensor construction due to their large specific surface area and high surface free energy. An important kind of biomolecule, DNA, can also be immobilized with nanoparticles and used for the construction of electrochemical DNA sensors …”

Section: Resultssupporting

confidence: 73%

“…On the other hand, they require expensive instrumentation and involve time‐consuming procedures. Electrochemical methods represent another class of widely used techniques for the detection of metal ions . Carbon paste electrodes (CPEs) are suggested as very useful end point indicator electrodes in the potentiometric titration of metal ions .…”

Section: Introductionmentioning

confidence: 91%

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Construction and characterization of nano iron complex ionophore for electrochemical determination of Fe(III) in pure and various real water samples

Ali

Mahmoud

2019

Applied Organom Chemis

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Electrochemical methods represent an important class of widely used techniques for the detection of metal ions. The unique chemical and physical properties of nanoparticles make them extremely suitable for designing new and improved sensing devices, especially electrochemical sensors and biosensors. This study focused on the synthesis of a nano-Fe(III)-Sud complex and its characterization using various spectroscopic and analytical tools, optimized using the density functional theory method, screened for antibacterial activity and evaluated for possible binding to DNA using molecular docking study. Proceeding from the collected information, nano-Fe(III)-Sud was used further for constructing carbon paste and screen-printed ion-selective electrodes. The proposed sensors were successfully applied for the determination of Fe(III) ions in various real and environmental water samples. Some texture analyses of the electrode surface were conducted using atomic force microscopy. At optimum values of various conditions, the proposed electrodes responded towards Fe(III) ions linearly in the range 2.5 × 10 −9 -1 × 10 −2 and 1.0 × 10 −8 -1 × 10 −2 M with slope of 19.73 ± 0.82 and 18.57 ± 0.32 mV decade −1 of Fe(III) ion concentration and detection limit of 2.5 × 10 −9 and 1.0 × 10 −8 M for Fe(III)-Sud-SPE (electrode I) and Fe(III)-Sud-CPE (electrode II), respectively. The electrode response is independent of pH in the range 2.0-7.0 and 2.5-7.0, with a fast response time (4 and 7 s) at 25°C for electrode I and electrode II, respectively.Moreover, the electrodes also showed high selectivity and long lifetime (more than 6 and 3 months for electrode I and electrode II, respectively). The electrodes showed good selectivity for Fe(III) ions among a wide variety of metal ions. The results obtained compared well with those obtained using atomic absorption spectrometry.

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Section: Resultssupporting

confidence: 73%

Section: Introductionmentioning

confidence: 91%

Construction and characterization of nano iron complex ionophore for electrochemical determination of Fe(III) in pure and various real water samples

Ali

Mahmoud

2019

Applied Organom Chemis

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“…Among them, zinc sulfide (ZnS) has been extensively studied for various applications including electroluminescent devices, [14][15][16] biomedical labeling, 17 and sensors. 18 In addition, it has also caused more attention in photocatalysis due to the fast generation of photogenerated electron-hole pairs 19 and more negative conduction band potential. 20,21 The theoretical efficiency of photocarrier generation of ZnS is even higher than that of TiO 2 .…”

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confidence: 99%

Effect of effective mass and spontaneous polarization on photocatalytic activity of wurtzite and zinc-blende ZnS

2015

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Semiconductor zinc sulphide (ZnS) has two common phases: hexagonal wurtzite and cubic zinc-blende structures. The crystal structures, energy band structures, density of states (DOS), bond populations, and optical properties of wurtzite and zinc-blende ZnS were investigated by the density functional theory of first-principles. The similar band gaps and DOS of wurtzite and zinc-blende ZnS were found and implied the similarities in crystal structures. However, the distortion of ZnS4 tetrahedron in wurtzite ZnS resulted in the production of spontaneous polarization and internal electric field, which was beneficial for the transfer and separation of photogenerated electrons and holes.

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“…Within this category of materials, although Cd II based materials, like CdS, CdSe, CdTe, etc., have been widely studied, the toxicity of cadmium imparts a doubtful future for applications in promising biological applications . Hence, in recent years, major interest has been growing for Zn II based materials, which are considered to be relatively more biologically acceptable systems . However, ZnS QDs have limited optical applications in view of their narrow exciton diameter (≈5.5 nm) .…”

Section: Introductionmentioning

confidence: 99%

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

et al. 2017

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In view of their promising bio-applicability, we have synthesized water-soluble bovine serum albumin (BSA)-encapsulated ZnSe quantum dots (QDs) with visible emission with longer average luminescence lifetimes of approximately 125 ns at ambient conditions. BSA-ZnSe QDs are shown to be efficient selective copper ion probes in the presence of physiologically important metal ions through luminescence quenching with a high Stern-Volmer constant (3.3×10 m ). The mechanism of sensing has been explained in terms of electron transfer processes and the apparent rate of electron transfer (K ) from ZnSe QDs to Cu has been calculated to be 2.8×10 s . It is demonstrated that the negative conduction band potential plays a major role in the feasibility of the electron transfer process, which is reflected in the higher efficacy of ZnSe QDs in sensing copper(II) ions over other group II-VI quantum dots, namely, CdSe, ZnS, or CdS. The results observed with cysteine-capped QDs are almost identical to those with BSA-encapsulated QDs and this presumably negates the possible reason of Cu ion induced quenching ascribed to its binding with surface groups or replacement of metal sites as proposed by several groups previously.

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Behaviour of Zinc Complexes and Zinc Sulphide Nanoparticles Revealed by Using Screen Printed Electrodes and Spectrometry

Cited by 15 publications

References 66 publications

Construction and characterization of nano iron complex ionophore for electrochemical determination of Fe(III) in pure and various real water samples

Construction and characterization of nano iron complex ionophore for electrochemical determination of Fe(III) in pure and various real water samples

Effect of effective mass and spontaneous polarization on photocatalytic activity of wurtzite and zinc-blende ZnS

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

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Behaviour of Zinc Complexes and Zinc Sulphide Nanoparticles Revealed by Using Screen Printed Electrodes and Spectrometry

Cited by 15 publications

References 66 publications

Construction and characterization of nano iron complex ionophore for electrochemical determination of Fe(III) in pure and various real water samples

Construction and characterization of nano iron complex ionophore for electrochemical determination of Fe(III) in pure and various real water samples

Effect of effective mass and spontaneous polarization on photocatalytic activity of wurtzite and zinc-blende ZnS

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced CuII Ion Sensing

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Resources

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Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing