Long time effect on the stability of silver nanoparticles in aqueous medium: Effect of the synthesis and storage conditions

Pinto, Vanda; Ferreira, Maria José; Silva, Ricardo; Santos, Hélder A.; Silva, F.; Pereira, Carlos M.

doi:10.1016/j.colsurfa.2010.04.015

Cited by 156 publications

(107 citation statements)

References 30 publications

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“…These features mainly mixing of plant extract and metal salt(s) [10]. The stability of produced nanoparticles can in some cases change after a few days or the nano-particles can remain stable over long periods [11].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis and characterization of silver nanoparticles produced using Arbutus Unedo leaf extract

et al. 2012

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Metallic nanoparticles have received great attention from chemists, physicists, biologists and engineers who wish to use them for the development of a new generation of nanodevices. In the present study silver nano-particles were synthesized from aqueous silver nitrate through a simple and eco-friendly route using leaf broth of Arbutus unedo, which acted as a reductant and stabilizer simultaneously. The aqueous silver ions when exposed to the leaf broth were reduced and stabilized over long periods of time resulting in the green synthesis of surface functionalized silver nanoparticles. The bio-reduced silver nanoparticles were appropriately characterized. The results revealed the formation of single crystalline Ag nanoparticles with a nar-row size distribution for each sample. The particles, although discrete, were predominately coated with the organic leaf extract forming small aggregates, which makes them stable over long time periods and highly appropriate for coatings or biotechnology applications.

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Section: Introductionmentioning

confidence: 99%

Green synthesis and characterization of silver nanoparticles produced using Arbutus Unedo leaf extract

et al. 2012

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“…Visual observation of the experimental mixture after addition of algal cells into AgNO 3 solution showed a colour change from transparent to brown whereas no colour could be observed in control experiment without addition of cells. The appearance of brown colour of colloidal silver solution clearly indicates the formation of silver nanoparticles in the reaction mixture (PINTO et al, 2010). The formation of nanoparticles was confirmed by UV-vis spectroscopy.…”

Section: Resultsmentioning

confidence: 80%

“…In the UV-vis absorption spectrum, SPR peaks located at 418, 420, 419 and 419 nm were observed for nanoparticles synthesized by 1, 2, 3 and 4 week-old algae, respectively. It is well documented that position of peaks, assigned to a surface plasmon, can be attributed to the nanoparticle size (PINTO et al, 2010). Based on the peak position of SPR bands shown in Fig.…”

Section: Influence Of Culture Agementioning

confidence: 87%

The Effect of Culture Age and Initial Silver Concentration on Biosynthesis of Ag Nanoparticles

Kaduková¹,

Velgosová²,

Mražíková³

et al. 2014

Nova Biotechnologica Et Chimica

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Abstract:Many organisms or their extracts have the ability to reduce Ag + ions to Ag 0 and stabilize them what results in nanoparticle formation in solution. The aim of the article was to study the influence of two selected parameters -initial silver concentration and culture age, on Ag nanoparticles production by green algae Parachlorella kessleri. The presence of Ag nanoparticles in the solution was confirmed by the UV-vis spectroscopy and TEM analyses. Typical curve with the peak at app. 420 nm was found for nanoparticles produced by algae. While culture age did not have any significant effect, the initial silver concentration had significant influence on nanoparticle production which influenced the rate of nanoparticle production, their amount, their size and stability, as well.

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“…To the best of our knowledge, the formation and stabilization of AgNPs could only be achieved through the use of certain reducing and stabilizing agents, and even then obtaining small particles as small as 3 nm is quite challenging (Bastús et al 2014;Pinto et al 2010;Leo et al 2013). This is the first synthetic route that allows synthesis of highly stable small-sized AgNPs without any chemicals and simultaneous synthesis of novel nanotubebased nanohybrid architectures.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

et al. 2015

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A novel colloidal method is presented to synthesize silver nanoparticles on aluminosilicate nanotubes. The technique involves decomposition of AgNO 3 solution to Ag nanoparticles in the presence of aluminosilicate nanotubes at room temperature without utilizing of reducing agents or any organic additives. Aluminosilicate nanotubes are shown to be capable of providing a unique chemical environment, not only for in situ conversion of Ag ? into Ag 0 , but also for stabilization and immobilization of Ag nanoparticles. The synthesis strategy described here could be implemented to obtain self-assembled nanoparticles on other single-walled metal oxide nanotubes for unique applications. Finally, we demonstrated that nanotube/nanoparticle hybrid show strong antibacterial activity toward Gram-positive Staphylococcus epidermidis and Gram-negative Escherichia coli.

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Long time effect on the stability of silver nanoparticles in aqueous medium: Effect of the synthesis and storage conditions

Cited by 156 publications

References 30 publications

Green synthesis and characterization of silver nanoparticles produced using Arbutus Unedo leaf extract

Green synthesis and characterization of silver nanoparticles produced using Arbutus Unedo leaf extract

The Effect of Culture Age and Initial Silver Concentration on Biosynthesis of Ag Nanoparticles

Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

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