Gold Nanoparticles and Hydrophobic Ionic Liquid Applied on the Development of a Voltammetric Biosensor for Polyphenol Determination

Zapp, Eduardo; Brondani, Daniela; Vieira, Iolanda Cruz; Dupont, Jaı̈rton; Scheeren, Carla Weber

doi:10.1002/elan.201000732

Cited by 27 publications

(28 citation statements)

References 56 publications

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“…79 A color change of the nanoparticle/ionic liquid dispersion as a function of time was reported in the case of gold nanoparticles (4-7 nm diameter) synthesized in 1-butyl-3-methylimidazolium ionic liquids. 70,81,84,[90][91][92][93][94][95] UV-vis spectra of gold nanoparticle dispersion in 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF 6 ]) (Fig. 84 The UV-vis spectra of gold nanoparticles exhibit a typical surface plasmon resonance (SPR) band at around 530 nm.…”

Section: Characterization Of Nanoparticle Dispersion Stability In Ionmentioning

confidence: 99%

Nanoparticles in ionic liquids: interactions and organization

Alexandridis

2015

Phys. Chem. Chem. Phys.

317

221

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Ionic liquids (ILs), defined as low-melting organic salts, are a novel class of compounds with unique properties and a combinatorially great chemical diversity. Ionic liquids are utilized as synthesis and dispersion media for nanoparticles as well as for surface functionalization. Ionic liquid and nanoparticle hybrid systems are governed by a combined effect of several intermolecular interactions between their constituents. For each interaction, including van der Waals, electrostatic, structural, solvophobic, steric, and hydrogen bonding, the characterization and quantitative calculation methods together with factors affecting these interactions are reviewed here. Various self-organized structures based on nanoparticles in ionic liquids are generated as a result of a balance of these intermolecular interactions. These structures, including colloidal glasses and gels, lyotropic liquid crystals, nanoparticle-stabilized ionic liquid-containing emulsions, ionic liquid surface-functionalized nanoparticles, and nanoscale ionic materials, possess properties of both ionic liquids and nanoparticles, which render them useful as novel materials especially in electrochemical and catalysis applications. This review of the interactions within nanoparticle dispersions in ionic liquids and of the structure of nanoparticle and ionic liquid hybrids provides guidance on the rational design of novel ionic liquid-based materials, enabling applications in broad areas.

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Section: Characterization Of Nanoparticle Dispersion Stability In Ionmentioning

confidence: 99%

Nanoparticles in ionic liquids: interactions and organization

Alexandridis

2015

Phys. Chem. Chem. Phys.

317

221

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“…The regression equation is log I pa (mA) ¼ 1.271 + 0.5723log C (mmol L À1 ) with R ¼ 0.9970. The detection limit (S/ N ¼ 3) is estimated to be about 4.0 Â 10 À9 mol L À1 , which is lower than that obtained on a Nujol:Au-BMIM$PF 6 -biosensor (1.1 Â 10 À7 mol L À1 ) 35 and a carbon nanotube/poly(ethylene-covinyl acetate) composite electrode (0.22-0.27 Â 10 À6 mol L À1 ). 9 This lower detection limit could be attributed to the combination of CdSe NPs and PDDA-G, in which the CdSe NPs can increase the electrochemically adsorptive site and the PDDA-G could also provide the large specific surface area to increase the loading of esculetin.…”

Section: Determination Of Esculetinmentioning

confidence: 66%

“…2 It has multiple biological and pharmacological activities, such as the inhibition of the xanthine oxidize activity and platelet aggregation, 3,4 antioxidant, antiinflammatory, anti-arrhythmic and anti-carcinogenic effects. 5 Therefore, it is necessary to establish some rapid, simple and accurate approaches for the determination of esculetin. Some analytical methods, such as ultraviolet (UV) spectrometry, 6 highperformance liquid chromatography, 7 capillary electrophoresis 8,9 and electrochemical techniques, 10 have been used in the determination of esculetin.…”

Section: Introductionmentioning

confidence: 99%

Sensitive detection of esculetin based on a CdSe nanoparticles-decorated poly(diallyldimethylammonium chloride)-functionalized graphene nanocomposite film

Zhang

Lin

et al. 2011

Analyst

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An electrochemical sensor based on a CdSe nanoparticles (NPs)-decorated poly(diallyldimethylammonium chloride) (PDDA)-functionalized graphene (CdSe-PDDA-G) nanocomposite was fabricated for the sensitive detection of esculetin. The nanocomposite was characterized by X-ray diffraction (XRD), ultraviolet/visible spectra (UV-vis) and transmission electron microscopy (TEM). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to investigate the electrochemical behaviors of esculetin on the CdSe-PDDA-G composite film-modified glassy carbon electrode (GCE). The experimental results indicated that the incorporation of CdSe NPs with PDDA-G greatly enhanced the electrochemical response of esculetin. This electrochemical sensor displayed satisfactory analytical performance for esculetin detection over a range from 1.0 × 10(-8) to 5.0 × 10(-5) mol L(-1) with a detection limit of 4.0 × 10(-9) mol L(-1) (S/N = 3). Moreover, the sensor also exhibited good reproducibility and stability, and could be used for the detection of esculetin in real samples with satisfactory results.

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“…The ESC has multiple biological and pharmacological activities, such as inhibition of the xanthine oxidizing activity and platelet aggregation 9,10 antioxidant, anti-inflammatory, anti-arrhythmic and anti-carcinogenic effects. 11 Consequently, it is interesting and significant to establish some rapid, simple, and accurate approaches for determination of ESC in natural plant medicines.…”

Section: Introductionmentioning

confidence: 99%

Simple and Sensitive Voltammetric Determination of Esculetin Using Electrochemically Reduced Graphene Oxide Modified Electrode

et al. 2015

J Chinese Chemical Soc

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A simple and sensitive voltammetric sensor for esculetin, based on electrochemically reduced graphene oxide film modified glassy carbon electrode, was reported for the quantitative determination of esculetin in the Chinese traditional herbal drug Viola yedoensis Makino. Electrochemical impedance spectroscopy and scanning electron microscopy were employed to study the characteristic of the graphene oxide film. The electrochemical behavior of esculetin on this sensor was investigated in pH 3.0 phosphate buffer solution by cyclic voltammetry. Significant advantages were achieved by the excellent conductivity and the high surface-to-volume ratio of electrochemically reduced graphene oxide. A calibration plot of oxidation peak currents versus esculetin concentrations was linear in the range of 4.0´10 -8 mol L -1 to 5.0´10 -6 mol L -1 with a detection limit of 2.0´10 -8 mol L -1 . The practical application of the present sensor was demonstrated by determining the concentration of esculetin in real sample with no interference.

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Gold Nanoparticles and Hydrophobic Ionic Liquid Applied on the Development of a Voltammetric Biosensor for Polyphenol Determination

Cited by 27 publications

References 56 publications

Nanoparticles in ionic liquids: interactions and organization

Nanoparticles in ionic liquids: interactions and organization

Sensitive detection of esculetin based on a CdSe nanoparticles-decorated poly(diallyldimethylammonium chloride)-functionalized graphene nanocomposite film

Simple and Sensitive Voltammetric Determination of Esculetin Using Electrochemically Reduced Graphene Oxide Modified Electrode

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