Biosynthesis of silver nanoparticles using aqueous extract from the compactin producing fungal strain

Shaligram, Nikhil S.; Bule, Mahesh V.; Bhambure, Rahul; Singhal, Rekha S.; Singh, S. N.; Szakács, George; Pandey, Ashok

doi:10.1016/j.procbio.2009.04.009

Cited by 317 publications

(124 citation statements)

References 29 publications

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“…The silver nanoparticles production capacity has been depended on the reductase/electron shuttle relationships. Next paper presents the extracellular synthesis of stable silver nanoparticles using the fungus Penicillium brevicompactum WA 2315 (Shaligram et al 2009). The analysis of data obtained from transmission electron microscope showed the average size of nanoparticles to be 58.35 ± 17.88 nm.…”

Section: Synthesis Of Nanoparticles By the Fungal Systemsmentioning

confidence: 99%

Biosynthesis and Application of Silver and Gold Nanoparticles

Sadowski¹

2010

Silver Nanoparticles

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Section: Synthesis Of Nanoparticles By the Fungal Systemsmentioning

confidence: 99%

Biosynthesis and Application of Silver and Gold Nanoparticles

Sadowski¹

2010

Silver Nanoparticles

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“…428 nm. The increasing of absorbance intensity with time indicates that Ag + ions are still presented in solution [25]. The TEM image of AgNPs formed on 4 th day, Fig.…”

Section: Resultsmentioning

confidence: 92%

Limitations and possibilities of green synthesis and long-term stability of colloidal Ag nanoparticles

Velgosová

Mražíková

2017

AIP Conference Proceedings

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Abstract. In this paper the influence of algae life cycle and the solutions pH on the green synthesis of colloidal Ag nanoparticles (AgNPs) as well as effect of different storage conditions on AgNPs long-term stability was investigated. Silver nanoparticles were biologically synthesized using extracts of Parachlorella kessleri algae cultivated 1, 2, 3 and 4 weeks. The formation of AgNPs was monitored using a UV-vis spectrophotometer and verified by TEM observation. The results confirmed formation of polyhedron and/or near polyhedron AgNPs, ranging between 5 and 60 nm in diameter. The age of algae influenced the synthesis rate and an amount of AgNPs in solution. The best results were obtained using tree weeks old algae. UV-vis analysis and TEM observation also revealed that the size and the stability of AgNPs depend on the pH of solution. AgNPs formed in solutions of higher pH (8 and 10) are polyhedron, fine, with narrow size interval and stabile. Nanoparticles formed in solutions of low pH (2, 4 and 6) started to lose their stability on 10 th day of experiment, and the particle size interval was wide. The long-term stability of AgNPs can be influenced by light and temperature conditions. The most significant stability loss was observed at day light and room temperature (21°C). After 200-days significant amount of agglomerated particles settled on the bottom of the Erlenmeyer flask. AgNPs stored at dark and room temperature showed better long-term stability, weak particles agglomeration was observed. AgNPs stored at dark and at temperature 5°C showed the best long-term stability. Such AgNPs remained spherical, fine (5-20 nm), with narrow size interval and stable (no agglomeration) even after more than six months.

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“…Almost linear relationship between the maximum absorbance and time during the first 14 days was observed. The absorbance intensity did not change significantly between the 10 th and 14 th day indicating that all Ag + ions were turned to nanoparticles (SHALIGRAM et al, 2009). From the 15 th day the sharp decrease of maximum absorbance was recorded suggesting the aggregation and precipitation of nanoparticles.…”

Section: Fig 1 Uv-vis Spectrum Of Ag Nanoparticles Produced By Algamentioning

confidence: 92%

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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Biosynthesis of silver nanoparticles using aqueous extract from the compactin producing fungal strain

Cited by 317 publications

References 29 publications

Biosynthesis and Application of Silver and Gold Nanoparticles

Biosynthesis and Application of Silver and Gold Nanoparticles

Limitations and possibilities of green synthesis and long-term stability of colloidal Ag nanoparticles

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

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