Homogeneous and heterogeneous nucleations in the polyol process for the preparation of micron and submicron size metal particles

Fiévet, Fernand; Lagier, Jean-Pierre; Blin, B.; Beaudoin, B.; Figlarz, M.

doi:10.1016/0167-2738(89)90222-1

Cited by 781 publications

(481 citation statements)

References 5 publications

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“…Therefore, by selecting a stabilizing agent with a certain selective adsorption or introducing an additive together with the stabilizing agent in the reaction that displays surface-regulating properties, anisotropic nanocrystals can be synthesized in a solution phase. Gold nanoparticles of different shapes have been synthesized in non-aqueous media, mainly based on the socalled " polyol process " [111] . This process involves the thermal reduction of a metal salt in liquid polyols or diols that act as both solvent for the metal precursor and mild reducing reagent.…”

Section: Physically Adsorbed Polymersmentioning

confidence: 99%

Coating matters: the influence of coating materials on the optical properties of gold nanoparticles

Chanana¹,

Liz‐Marzán²

2012

Nanophotonics

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An essential element in the synthesis of nanomaterials based on gold nanoparticles comprises the control over parameters such as size, shape and composition, due to their strong infl uence on the properties of the particles. However, it is the coating material which often plays the primary role in tuning the size, morphology, and even plasmon resonance wavelength or mode multiplicity, as well as colloidal stability and functional versatility, ultimately determining the physical, chemical, optical, electronic and catalytic properties of the nanoparticles. Therefore, it is utterly important to select the adequate wet chemistry synthetic approach with the most suitable coating material for the preparation of gold nanoparticles with the desired requirements. Within this context, this review is focused on describing various types of organic and inorganic coating materials for gold nanoparticles that may notably affect their optical properties by either directly infl uencing the synthesis procedure or by changing their chemical and physical properties upon post-synthetic modifi cations, such that they exhibit novel and useful optical properties.

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Section: Physically Adsorbed Polymersmentioning

confidence: 99%

Coating matters: the influence of coating materials on the optical properties of gold nanoparticles

Chanana¹,

Liz‐Marzán²

2012

Nanophotonics

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“…The organically capped silver nanoparticles were prepared using a modification of the polyol method described by Fievet et al 26 as follows. A solution containing silver acetate (0.030 M) in ethylene glycol (10 mL) was injected into a hot solution containing 30 mL of trioctylamine and 10 mL of oleylamine (120 C) for 30 min.…”

Section: Synthesis Of Ag-based Nanocompositesmentioning

confidence: 99%

Polymer based silver nanocomposites as versatile solid film and aqueous emulsion SERS substrates

et al. 2011

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Nanocomposites containing Ag nanoparticles (average diameter $11 nm) dispersed in poly(tertbutylacrylate) were prepared by in situ polymerization via miniemulsions and constitute active and versatile SERS substrates. The use of this synthetic strategy enables the dual use of the final composites as SERS substrates, both as aqueous emulsions and as cast films, shown here by several measurements using thiosalicylic acid as the testing analyte. The main advantage of these types of materials is related to the potential to scale up and the widespread use of handy substrates, using technology already available. This requires homogeneous composite substrates with SERS activity and this was demonstrated here by means of confocal Raman microscopy. Finally, a series of experiments were carried out on Ag/polymer nanocomposites submitted to temperature variations below and above the polymer glass transition temperature (T g ) in order to conclude about the effect of temperature processing conditions on the composites' SERS activity.

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“…Polyol process has demonstrated in the last decades, a very good control of the shape and crystallinity of nano-objects based on ferromagnetic 3d-metal ions(author?) [30]. This process has attracted a lot of attention thanks to its low cost together with the easy and reliable control shown over the nano-objects composition, shape and dispersion.…”

Section: Introductionmentioning

confidence: 99%

Morphology control of the magnetization reversal mechanism in Co80Ni20 nanomagnets

Mercone

Zighem

Léridon

et al. 2015

Journal of Applied Physics

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Nanowires with very different size, shape, morphology and crystal symmetry can give rise to a wide ensemble of magnetic behaviors whose optimization determines their applications in nanomagnets. We present here an experimental work on the shape and morphological dependence of the magnetization reversal mechanism in weakly interacting Co80Ni20 hexagonal-close-packed nanowires. Non-agglomerated nanowires (with length L and diameter d) with a controlled shape going from quasi perfect cylinders to diabolos, have been studied inside their polyol solution in order to avoid any oxidation process. The coercive field HC was found to follow a standard behavior and to be optimized for an aspect ratio L d > 15. Interestingly, an unexpected behavior was observed as function of the head morphology leading to the strange situation where a diabolo shaped nanowire is a better nanomagnet than a cylinder. This paradoxical behavior can be ascribed to the growth-competition between the aspect ratio L d and the head morphology ratio d D (D being the head width). Our experimental results clearly show the importance of the independent parameter (t = head thickness) that needs to be considered in addition to the shape aspect ratio ( L d ) in order to fully describe the nanomagnets magnetic behavior. Micromagnetic simulations well support the experimental results and bring important insights for future optimization of the nanomagnets morphology.

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Homogeneous and heterogeneous nucleations in the polyol process for the preparation of micron and submicron size metal particles

Cited by 781 publications

References 5 publications

Coating matters: the influence of coating materials on the optical properties of gold nanoparticles

Coating matters: the influence of coating materials on the optical properties of gold nanoparticles

Polymer based silver nanocomposites as versatile solid film and aqueous emulsion SERS substrates

Morphology control of the magnetization reversal mechanism in Co80Ni20 nanomagnets

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