Nanostructural materials formation by mechanical alloying: Morphologic analysis based on transmission and scanning electron microscopic observations

Gaffet, Éric; Tachikart, M.; Kedim, O. El; Rahouadj, Rachid

doi:10.1016/s1044-5803(96)00047-2

Cited by 54 publications

(20 citation statements)

References 3 publications

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“…Silver nanomaterials can be obtained by both the so-called 'top-down' and 'bottom-up' methods. The top-down method involves the mechanical grinding of bulk metals and subsequent stabilization of the resulting nanosized metal particles by the addition of colloidal protecting agents [11,12]. The bottom-up methods, on the other hand, include reduction of metals, electrochemical methods, and sonodecomposition.…”

Section: Chemical and Physical Syntheses Of Silver Nanoparticlesmentioning

confidence: 99%

Silver nanoparticles: mechanism of antimicrobial action, synthesis, medical applications, and toxicity effects

Sukumaran¹,

Poulose²

2012

Int Nano Lett

1,957

1,099

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Silver nanoparticles are nanoparticles of silver which are in the range of 1 and 100 nm in size. Silver nanoparticles have unique properties which help in molecular diagnostics, in therapies, as well as in devices that are used in several medical procedures. The major methods used for silver nanoparticle synthesis are the physical and chemical methods. The problem with the chemical and physical methods is that the synthesis is expensive and can also have toxic substances absorbed onto them. To overcome this, the biological method provides a feasible alternative. The major biological systems involved in this are bacteria, fungi, and plant extracts. The major applications of silver nanoparticles in the medical field include diagnostic applications and therapeutic applications. In most of the therapeutic applications, it is the antimicrobial property that is being majorly explored, though the anti-inflammatory property has its fair share of applications. Though silver nanoparticles are rampantly used in many medical procedures and devices as well as in various biological fields, they have their drawbacks due to nanotoxicity. This review provides a comprehensive view on the mechanism of action, production, applications in the medical field, and the health and environmental concerns that are allegedly caused due to these nanoparticles. The focus is on effective and efficient synthesis of silver nanoparticles while exploring their various prospective applications besides trying to understand the current scenario in the debates on the toxicity concerns these nanoparticles pose.

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Section: Chemical and Physical Syntheses Of Silver Nanoparticlesmentioning

confidence: 99%

Silver nanoparticles: mechanism of antimicrobial action, synthesis, medical applications, and toxicity effects

Sukumaran¹,

Poulose²

2012

Int Nano Lett

1,957

1,099

View full text Add to dashboard Cite

show abstract

“…These particles may consist of a particular material, be of a particular size and shape, or have specialized surface functionality. Nanostructured metal colloids have been obtained by so-called "top-down" methods [4], e.g. by the mechanical grinding of bulk metals and subsequent stabilization of the resulting nanosized metal particles by the addition of colloidal protecting agents.…”

Section: Synthesis and Applications Of Nanostructured Particlesmentioning

confidence: 99%

Functionalized gold nanoparticles: Synthesis, structure and colloid stability

Zhou

Ralston

Sedev

et al. 2009

Journal of Colloid and Interface Science

371

223

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“…The topdown approch involves chopping down the bulk metals by mechanical means and the resulting particles are subsequently stabilised by colloidal protecting agents 12,13 . Application of metal vapour techniques [14][15][16] , which works on this principle, provides a versatile route for the production of a wide range of nanostructured metal colloids on a preparative laboratory scale 17,18 .…”

Section: Synthesis Of Nano Materials: Different Approchesmentioning

confidence: 99%

Synthesis of Silver Nanoparticles using Facile Wet Chemical Route

Sahoo¹,

Kamal²,

Kumar³

et al. 2009

DSJ

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Stable aqueous monodispersed silver nanoparticles were synthesised by reducing silver nitrate using various sugars such as glucose, fructose, lactose, and sucrose at 55-60 o C. A mixture of two stabilising agents, polyvinyl pyrrolidone (PVP) of molecular weight (MW 40, 000) and gelatin plays a decisive part in controlling size and shape of superfine silver nanoparticles. Using PVP, better control of particle size was obtained, whereas a mixture of PVP, and gelatin resulted in sea urchin kind of structure. Effects of several processing parameters such as pH, quantities of alkaline solution, reaction time, concentration of stabilising agent, and the metal/dispersant ratio were investigated. The suspensions were stable for at least one week. Silver nanoparticles can be easily collected by centrifugation on mixing with sufficient amount of acetone. Structural characterisation of synthesised silver nanoparticles was carried out by X-ray diffraction (XRD), which shows that the as-synthesised silver nanoparticles are face-centered cubic crystalline. Chemical characterisations of as-synthesized silver nanoparticles were done using inductively-coupled plasma-optical emission spectrometry (ICP-OES) and LECO gas analysers. The optical properties of silver nanoparticles were monitored using UV-Vis spectrophotometer. Role of stabilising agent in protecting the silver nanoparticles was studied using fourier transform infrared spectroscopy (FTIR). Particle size and distribution were characterised using smallangle X-ray scattering (SAXS), zeta particle size analyser (PSA), scanning electron microscopy, and transmission electron microscopy. The average particle size of the as-synthesised silver nanoparticles was 35 nm.

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Nanostructural materials formation by mechanical alloying: Morphologic analysis based on transmission and scanning electron microscopic observations

Cited by 54 publications

References 3 publications

Silver nanoparticles: mechanism of antimicrobial action, synthesis, medical applications, and toxicity effects

Silver nanoparticles: mechanism of antimicrobial action, synthesis, medical applications, and toxicity effects

Functionalized gold nanoparticles: Synthesis, structure and colloid stability

Synthesis of Silver Nanoparticles using Facile Wet Chemical Route

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