Biosynthesis of silver, gold and bimetallic nanoparticles using the filamentous fungus Neurospora crassa

Castro-Longoria, Ernestina; Vilchis-Néstor, Alfredo R.; Avalos-Borja, M.

doi:10.1016/j.colsurfb.2010.10.035

Cited by 424 publications

(146 citation statements)

References 37 publications

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“…Previous studies reported successful synthesis of silver nanoparticle types, especially AgNPs, assisted by biological agents, notably plant extracts, 8 and bacteria. 14 Although fungi are capable of producing silver nanoparticle types, most studies on fungal-based biosynthesis used filamentous fungi such as Neurospora 15 Trichoderma reesei, 16 Fusarium oxysporum, 17 Aspergillus niger 18 and Penicillium brevicompactum. 1 Nevertheless, a few studies reported successful biosynthesis of silver nanoparticle types by single-celled fungi (i.e., yeasts), including the yeast strain MKY3, 19 Candida albicans, 20 Saccharomyces boulardii 21 and Candida utilis.…”

Section: Introductionmentioning

confidence: 99%

Yeast-derived biosynthesis of silver/silver chloride nanoparticles and their antiproliferative activity against bacteria

et al. 2016

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Here, we provided the first evidences of yeast strains assisted Ag/AgCl-NPs production in vitro. The formed nanoparticles were characterized by spectroscopic and electron microscopy approaches. UV-Vis supported the biosynthesis. TEM analysis evidenced that nanoparticles mainly presented circular shape and their diameter varied mostly in the range from 2 to 10 nm. XRD analysis showed a crystalline structure, with diffraction peaks corresponding to metallic silver and silver chloride nanoparticles, and when analyzed by high-resolution transmission electron microscopy (HRTEM), instead of being round, (111) (octahedral) and (200) Ag/AgCl-NPs described here have characteristics compatible with a strong potential for use in the biotechnology industry, particularly for biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Yeast-derived biosynthesis of silver/silver chloride nanoparticles and their antiproliferative activity against bacteria

et al. 2016

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“…As we know, fungi are able to secrete more proteins, produce more biomass, and show higher metal tolerance and bioaccumulation ability [11]. So far, many fungal species such as Rhizopus oryzae [11], Neurospora crassa [12], Trichoderma harzianum [13], Aspergillus oryzae [9], Helminthosporum solani [14], Fusarium semitectum [15], and Candida albicans [16] have been reported to successfully synthesize AuNPs either through extra-or intracellular manners. Thus, fungi are considered to be the most promising candidates for AuNPs synthesis.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of gold nanoparticles assisted by the intracellular protein extract of Pycnoporus sanguineus and its catalysis in degradation of 4-nitroaniline

Shi¹,

Zhu²,

Cao³

et al. 2016

Nano Online

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which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.The development of green procedure for the synthesis of gold nanoparticles (AuNPs) has gained great interest in the field of nanotechnology. Biological synthetic routes are considered to be environmentally benign and cost-effective. In the present study, the feasibility of AuNPs' synthesis via intracellular protein extract (IPE) of Pycnoporus sanguineus was explored. The characteristics of generated particles of formation, crystalline nature, and morphology and dimension were analyzed by UV-vis spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. UV-vis spectra exhibited strong absorption peaks in 520 to 560 nm, indicating the formation of AuNPs. XRD analysis revealed that the formed AuNPs were purely crystalline in nature. TEM observation showed that AuNPs with various shapes including spherical, pseudo-spherical, triangular, truncated triangular, pentagonal, and hexagonal, ranging from several to several hundred nanometers, were synthesized under different conditions. The average size of AuNPs decreased from 61.47 to 29.30 nm as the IPE addition increased from 10 to 80 mL. When the initial gold ion concentration changed from 0.5 to 2.0 mM, the average size rose from 25.88 to 51.99 nm. As in the case of solution pH, the average size was 84.29 nm with solution pH of 2.0, which diminished to 6.07 nm with solution pH of 12.0. Fourier transform infrared (FTIR) analysis implied that the functional groups including hydroxyl, amine, and carboxyl were involved in the reduction of gold ions and stabilization of AuNPs. The catalysis results showed that 0.019 mg of AuNPs with average size of 6.07 nm could catalyze the complete degradation of 12.5 μmol of 4-nitroaniline within 6 min and the degradation rate increased drastically with the addition of AuNPs. All the results suggested that the IPE of P. sanguineus could be potentially applied for the eco-friendly synthesis of AuNPs.

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“…Exposure of Verticillium fungal biomass to aqueous silver ions resulted in the intracellular formation of AgNPs below the cell wall surface, possibly due to the reduction of the metal ions by enzymes present in the cell membrane (Mukherjee et al 2001). Intracellular formation of AgNPs was also reported in the filamentous fungus Neurospora crassa (Castro-Longoria et al 2011). In Fusarium oxysporum fungus, the reduction of silver ions to nanoparticles was attributed to an enzymatic process involving NADH-dependent reductase (Durán et al 2005).…”

Section: Introductionmentioning

confidence: 95%

Toward revealing the controversy of bacterial biosynthesis versus bactericidal properties of silver nanoparticles (AgNPs): bacteria and other microorganisms do not per se viably synthesize AgNPs

Morsy

2015

Arch Microbiol

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In the last two decades, a large number of literature had focused on the biosynthesis of silver nanoparticles (AgNPs) from silver ions by bacteria and other microorganisms. This study infers that bacteria and other microorganisms do not per se synthesize AgNPs. All tested auto- and heterotrophic microorganisms in this study were killed by silver ions and could not as viable cells produce AgNPs. Microbial cell viability represented in colony-forming units and metabolic viability represented in aerobic respiration in all investigated microorganisms as well as photosynthesis in photoautotrophic microorganisms ceased by silver ions too early before AgNPs formation. The time required for AgNPs synthesis inversely related to the incubation temperature of the investigated microorganisms with silver ions where it requires only few minutes for nanoparticles formation at high temperature or autoclaving. The minimum inhibitory and minimum bactericidal and fungicidal concentrations of silver ions were significantly lower than AgNPs, indicating that silver ions are more efficient antimicrobial. The results presented in this study indicate that formation of AgNPs by eubacteria, cyanobacteria and fungi is not a vitally regulated cellular metabolic process and the mechanism occurs via bioreduction of silver ions to nanoparticles by organics released from the dead cells.

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Biosynthesis of silver, gold and bimetallic nanoparticles using the filamentous fungus Neurospora crassa

Cited by 424 publications

References 37 publications

Yeast-derived biosynthesis of silver/silver chloride nanoparticles and their antiproliferative activity against bacteria

Yeast-derived biosynthesis of silver/silver chloride nanoparticles and their antiproliferative activity against bacteria

Biosynthesis of gold nanoparticles assisted by the intracellular protein extract of Pycnoporus sanguineus and its catalysis in degradation of 4-nitroaniline

Toward revealing the controversy of bacterial biosynthesis versus bactericidal properties of silver nanoparticles (AgNPs): bacteria and other microorganisms do not per se viably synthesize AgNPs

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