The nanostructure evolution of Ag powder synthesized by high energy ball milling

Khayati, Gholam Reza; Janghorban, K.

doi:10.1016/j.apt.2011.05.005

Cited by 66 publications

(27 citation statements)

References 8 publications

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“…20,[24][25][26] However, according to literature, there has been limited reports for the synthesis of nano sized silver particles by this process. 27 Poly(ethylene glycol) (PEG) is a synthetic polyether polymer frequently used medical applications, owing to its wide range of molecular weight, excellent solubility in aqueous medium, low toxicity, chain flexibility and its biocompatibility properties and in addition, it is biodegradable via its excretion from the body to form non-toxic metabolites. [28][29][30][31][32] PEG is used to modify biomaterial surface in order to prevent the foreign body reactions.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of poly(ethylene glycol) stabilized nano silver particles by a mechanochemical assisted ball mill process

Jayaramudu

Raghavendra

Varaprasad

et al. 2015

J of Applied Polymer Sci

125

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Nano silver particles with an average mean crystallite size of between 10 and 12 nm were synthesized from different molecular weights of poly(ethylene glycol) as a stabilizing agents, through solid state oxidation of silver nitrate using a higher energy planetary ball mill. Ultraviolet-Visible spectra were used to confirm the synthesis of nano silver particles. The surface plasmon resonance bands were observed around 410 nm. Fourier transformed infrared spectrum, X-ray diffraction, and transmission electronic microscopy techniques were used to characterize the nano silver particles synthesized. Thermal stability was determined using thermogravimetic analysis and the elemental composition of the sample was determined by energy dispersive X-ray analysis. The nano silver particles synthesized, exhibited very good antibacterial activity against Gram-positive bacteria (Bacillus) and Gram-negative bacteria (Pseudomonas aeruginosa). Based on the obtained results, it was additionally explored that the size and the stabilization of the nano silver particles synthesized, strongly depend on the molecular weight of poly(ethylene glycol).

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of poly(ethylene glycol) stabilized nano silver particles by a mechanochemical assisted ball mill process

Jayaramudu

Raghavendra

Varaprasad

et al. 2015

J of Applied Polymer Sci

125

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“…AgNPs have been synthesized using various methods. The physicochemical methods (e.g., ultrasound, templates, and milling process [11][12][13]), as well as "green" synthesis using microorganisms, enzymes, plants, or plant extracts [14][15][16] are equally effective, but sometimes they require complex apparatus [17]. Synthesis of AgNPs as per the chemical reduction in aqueous and nonaqueous solutions is the most common owing to its convenience, facility, being not timeconsuming, and producing a high yield of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Nanostructural Features of Silver Nanoparticles Powder Synthesized through Concurrent Formation of the Nanosized Particles of Both Starch and Silver

Hebeish

El‐Rafie

El-Sheikh

et al. 2013

Journal of Nanotechnology

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Green innovative strategy was developed to accomplish silver nanoparticles formation of starch-silver nanoparticles (St-AgNPs) in the powder form. Thus, St-AgNPs were synthesized through concurrent formation of the nanosized particles of both starch and silver. The alkali dissolved starch acts as reducing agent for silver ions and as stabilizing agent for the formed AgNPs. The chemical reduction process occurred in water bath under high-speed homogenizer. After completion of the reaction, the colloidal solution of AgNPs coated with alkali dissolved starch was cooled and precipitated using ethanol. The powder precipitate was collected by centrifugation, then washed, and dried; St-AgNPs powder was characterized using state-of-the-art facilities including UV-vis spectroscopy, Transmission Electron Microscopy (TEM), particle size analyzer (PS), Polydispersity index (PdI), Zeta potential (ZP), XRD, FT-IR, EDX, and TGA. TEM and XRD indicate that the average size of pure AgNPs does not exceed 20 nm with spherical shape and high concentration of AgNPs (30000 ppm). The results obtained from TGA indicates that the higher thermal stability of starch coated AgNPS than that of starch nanoparticles alone. In addition to the data obtained from EDX which reveals the presence of AgNPs and the data obtained from particle size analyzer and zeta potential determination indicate that the good uniformity and the highly stability of St-AgNPs).

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“…There are various methods to synthesize the Agnp. In general, the synthesis method can be divided into 3 (three) methods, namely the physical 6 , chemical 7 , and biological or green chemistry method. 8 All of these synthesis methods involve the use of reductants and stabilizers as the precursors.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticle and Its Antibacterial Activity

2017

RJC

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Silver nanoparticle (Ag-np) was successfully synthesized by using the simple green chemistry method. Its antibacterial activity was studied against Staphylococcus aureus and Escherichia coli according to agar well diffusion method. The green synthesis was carried out by mixing the silver nitrate, glucose, and starch as precursors at 90 0 C for 4 hours. The UV-Vis spectra show the characteristic of spherical Ag-np in the range of 410-425 nm and it is confirmed by TEM image. The Ag-np has an average diameter of 8.41 ± 4.37 nm. As the reductant mole composition increases, the SPR decreases and shifts to red due to the further growth of the Ag-np. When the stabilizer composition increases, the SPR intensity also increases and shifts to red. The formed Ag-np is stable even after one-month synthesis. The antibacterial test on the Ag-np was carried out against gram-positive bacteria (Staphylococcus aureus) and gram-negative bacteria (Escherichia coli). The result shows that a higher concentration of Ag-np is required to kill Staphylococcus aureus compared to Escherichia coli.

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The nanostructure evolution of Ag powder synthesized by high energy ball milling

Cited by 66 publications

References 8 publications

Preparation and characterization of poly(ethylene glycol) stabilized nano silver particles by a mechanochemical assisted ball mill process

Preparation and characterization of poly(ethylene glycol) stabilized nano silver particles by a mechanochemical assisted ball mill process

Nanostructural Features of Silver Nanoparticles Powder Synthesized through Concurrent Formation of the Nanosized Particles of Both Starch and Silver

Green Synthesis of Silver Nanoparticle and Its Antibacterial Activity

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