Ionic Liquids as Designer Solvents for the Synthesis of Metal Nanoparticles

Bansal, Vipul; Bhargava, Suresh K.

doi:10.5772/14408

Cited by 5 publications

(7 citation statements)

References 83 publications

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“…Other than the alkyl chain length, the coordination ability and size of the IL anion could also influence the nanofluids stability as well as nanoparticles size in these systems [24][25][26]. According to DLVO theory, ILs can provide an electrostatic protection around the nanoparticles by forming an ''electric shell'' that can stabilize them.…”

Section: Viscosity Measurementsmentioning

confidence: 99%

“…According to DLVO theory, ILs can provide an electrostatic protection around the nanoparticles by forming an ''electric shell'' that can stabilize them. Moreover, the thickness of this shell depends on the IL molecular ion volume and the nanoparticles size [26]. Simulation studies show that a protective layer of supramolecular aggregates of anionic species comprises this protective layer [25,27].…”

Section: Viscosity Measurementsmentioning

confidence: 99%

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Nanostructuring of 1-butyl-4-methylpyridinium chloride in ionic liquid–iron oxide nanofluids

Joseph

Fal

Żyła

et al. 2018

J Therm Anal Calorim

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Understanding the behavior of ionic liquids (ILs) in ionic liquid-based nanofluids has great significance for its proper application. The phase changes and solidification observed in most ILs offer a great challenge to nanoparticles stabilization. Herein, we have synthesized and characterized a new type of IL-based iron oxide nanofluids using 1-butyl-4-methylpyridinium chloride. We have investigated the formation of dendrite-like nanostructures by 1-butyl-4-methylpyridinium chloride at the IL-nanoparticle interface. This solidification induced under high electric field was nanoparticle size dependent and may be controlled by temperature and frequency changes. Examining the rheological behavior showed that higher volume fraction of nanoparticles in this nanofluids drastically decreased the flow viscosity causing a crossover from non-Newtonian (pure IL) to Newtonian and then to shear-thinning behavior. The nanofluid stability also decreased with the increase in nanoparticle size.

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Section: Viscosity Measurementsmentioning

confidence: 99%

Section: Viscosity Measurementsmentioning

confidence: 99%

Nanostructuring of 1-butyl-4-methylpyridinium chloride in ionic liquid–iron oxide nanofluids

Joseph

Fal

Żyła

et al. 2018

J Therm Anal Calorim

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“…More perfect NPs could be obtained by using ILs with a larger anion such as PF 6 À than with smaller ones such as Cl À , Br À , or BF 4 À . [165,166] Short alkyl chain-length methylimidazolium salts with weakly coordinating perfluorinated counter anions, such as PF 6 À , BF 4 À , or Tf 2 N À (Tf = trifluoromethanesulfonyl), were observed to be better stabilizers than ILs with cations bearing long alkyl chains, such as trihexyltetradecylphosphonium or 1-octyl-3-methylimidazolium, and anions of higher coordination strength (dicyanamide). [164] Similarly, an IL such as [C 4 MIM]][PF 6 ] with shorter alkyl chain length and lower viscosity formed smaller and stabler NPs than the use of [C 8 …”

Section: Stabilization In Ionic Liquid Dispersion Mediummentioning

confidence: 99%

“…[66] DLVO theory suggests the first inner shell to be composed of anions, which determines the size of the protected NPs. [165] Simulation studies show that a protective layer of supramolecular aggregates of anionic species comprises this protective layer. [166] When IL is mixed with other molecules, it forms nanostructured materials with polar and nonpolar regions.…”

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confidence: 99%

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Ferrofluids: Synthetic Strategies, Stabilization, Physicochemical Features, Characterization, and Applications

Joseph

Mathew

2014

ChemPlusChem

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Ferrofluids (FFs) or magnetic nanofluids are incredible smart materials consisting of ultrafine magnetic nanoparticles suspended in a liquid carrier medium, which exhibit both fluidity and magnetic controllability. Studies involving the dynamics and physicochemical properties of these magnetic nanofluids are an interdisciplinary area of research attracting researchers from different fields of science and technology. Herein, a comprehensive Review on the different aspects of FF research is presented. First, the synthesis and stabilization of various types of FFs are discussed followed by their physicochemical features such as polydispersity, magnetic behavior, dipolar interactions, formation of chainlike aggregates, and long‐range ordering. The Review also details the rheological and thermal properties, dynamic instabilities, phase behavior, and particle assemblies in FFs to form complex multipolar geometries, photonic nanostructures, labyrinth structures, thin films, and droplets. Many important characterization techniques for probing FF properties are also briefly discussed, and the numerous innovative applications and future prospects of FFs are outlined.

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Alkyl substituent effect on density, viscosity and chemical behavior of 1-alkyl-3-methylimidazolium chloride

et al. 2014

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Molecular structure of the conformers of 1-C n -3-methylimidazolium chloride (n = 1 to 4) ionic liquids has been explored and the relationships with density and viscosity have been studied using COSMO related methodologies. Effects of the number of conformers, ionic character, anion-cation relative positions and the alkyl chain length of the cation on predictions of properties have been analyzed. The quality of the predictions has been tested by comparing with experimental results. Moreover, COSMO polarization charge densities, σ-profiles and σ-potentials of the conformers have been analyzed. Predictions on the chemical behavior based on the values of these properties in the conformers have been used to elucidate the affinity for electrophilic and nucleophilic reagents of ionic liquids.

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Ionic Liquids as Designer Solvents for the Synthesis of Metal Nanoparticles

Cited by 5 publications

References 83 publications

Nanostructuring of 1-butyl-4-methylpyridinium chloride in ionic liquid–iron oxide nanofluids

Nanostructuring of 1-butyl-4-methylpyridinium chloride in ionic liquid–iron oxide nanofluids

Ferrofluids: Synthetic Strategies, Stabilization, Physicochemical Features, Characterization, and Applications

Alkyl substituent effect on density, viscosity and chemical behavior of 1-alkyl-3-methylimidazolium chloride

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