Microbiological synthesis of nanophase PbS by Desulfotomaculum sp.

Gong, Jie; Zhang, Zhaoming; Bai, Haotian; Guan-e, Yang

doi:10.1007/s11431-007-0045-x

Cited by 17 publications

(8 citation statements)

References 17 publications

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“…An alternative may be sought in biological methods of synthesis [4]. Microbial synthesis of metal [11,38] and semiconductor [41,12,9] nanoparticles has been widely reported, resulting from the microorganisms' intrinsic metalresistance mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Facile biosynthesis, separation and conjugation of gold nanoparticles to doxorubicin

Kumar¹,

Peter²,

Nadeau³

2008

Nanotechnology

178

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Particle shape and size determine the physicochemical and optoelectronic properties of nanoscale materials, including optical absorption, fluorescence, and electric and magnetic moments. It is thus desirable to be able to synthesize and separate various particle shapes and sizes. Biosynthesis using microorganisms has emerged as a more ecologically friendly, simpler, and more reproducible alternative to chemical synthesis of metal and semiconductor nanoparticles, allowing the generation of rare forms such as triangles. Here we show that the plant pathogenic fungus Helminthosporum solani, when incubated with an aqueous solution of chloroaurate ions, produces a diverse mixture of extracellular gold nanocrystals in the size range from 2 to 70 nm. A plurality are polydisperse spheres, but a significant number are homogeneously sized rods, triangles, pentagons, pyramids, and stars. The particles can be separated according to their size and shape by using a sucrose density gradient in a tabletop microcentrifuge, a novel and facile approach to nanocrystal purification. Conjugation to biomolecules can be performed without further processing, as illustrated with the smallest fraction of particles which were conjugated to the anti-cancer drug doxorubicin (Dox) and taken up readily into HEK293 cells. The cytotoxicity of the conjugates was comparable to that of an equivalent concentration of Dox.

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Section: Introductionmentioning

confidence: 99%

Facile biosynthesis, separation and conjugation of gold nanoparticles to doxorubicin

Kumar¹,

Peter²,

Nadeau³

2008

Nanotechnology

178

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“…In addition to CdS NPs, other S-NPs, such as those of zinc sulfide (ZnS) and lead sulfide (PbS), have also been synthesized using SRB [100,[137][138][139]. For instance, Labrenz et al reported sphalerite ZnS NP formation within biofilms of Desulfobacteriaceae sp.…”

Section: Using Bacteriamentioning

confidence: 99%

Biogenic Sulfur-Based Chalcogenide Nanocrystals: Methods of Fabrication, Mechanistic Aspects, and Bio-Applications

et al. 2022

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Bio-nanotechnology has emerged as an efficient and competitive methodology for the production of added-value nanomaterials (NMs). This review article gathers knowledge gleaned from the literature regarding the biosynthesis of sulfur-based chalcogenide nanoparticles (S-NPs), such as CdS, ZnS and PbS NPs, using various biological resources, namely bacteria, fungi including yeast, algae, plant extracts, single biomolecules, and viruses. In addition, this work sheds light onto the hypothetical mechanistic aspects, and discusses the impact of varying the experimental parameters, such as the employed bio-entity, time, pH, and biomass concentration, on the obtained S-NPs and, consequently, on their properties. Furthermore, various bio-applications of these NMs are described. Finally, key elements regarding the whole process are summed up and some hints are provided to overcome encountered bottlenecks towards the improved and scalable production of biogenic S-NPs.

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“…Engels et al (2000) and Rudzinski et al (2004) reported that methanethiol under aerobic conditions is converted rapidly to dimethyldisulfide (DMDS) and/or dimethyl-trisulfide which caused precipitation for PbS nanoparticles. Gong et al (2007) obtained PbS nanoparticles by Desulfotomaculum sp. (strictly anaerobic sulfate-reducing bacteria).…”

Section: +mentioning

confidence: 99%

Accumulation of some heavy metals by metal resistant avirulent Bacillus anthracis PS2010 isolated from Egypt

Elsilk¹,

El-Shanshoury²,

Ateya³

2014

Afr. J. Microbiol. Res.

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The bacteria with a high growth rate were isolated from polluted industrial waste water. The bacteria Bacillus anthracis PS2010 have variable resistant to heavy metals such as Cd, Cu, Co, Zn and Pb. Out of which the minimal inhibitory concentrations were 0.6, 2.0, 0.8, 4.0 and 3.0 mM, respectively. The potent bacterium has optimal biosorption capacity raised according to the metal, incubation temperature, pH of the solution and contact time. Under optimal conditions, the bacterium was capable of taking up the heavy metals Cd, Cu, Co, Zn and Pb at 3.41, 2.03, 4.75, 5.22 and 6.44 mg/g dry weight. Transmission electron microscopy showed accumulation of Pb metal external to bacterial cells. The mechanism of heavy metal tolerance in Bacillus anthracis PS2010 is chromosomally encoded. Bacillus anthracis harbored no plasmid.

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Microbiological synthesis of nanophase PbS by Desulfotomaculum sp.

Cited by 17 publications

References 17 publications

Facile biosynthesis, separation and conjugation of gold nanoparticles to doxorubicin

Facile biosynthesis, separation and conjugation of gold nanoparticles to doxorubicin

Biogenic Sulfur-Based Chalcogenide Nanocrystals: Methods of Fabrication, Mechanistic Aspects, and Bio-Applications

Accumulation of some heavy metals by metal resistant avirulent Bacillus anthracis PS2010 isolated from Egypt

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