Enhancement of antibacterial activity of synthesized ligand‐free CdS nanocrystals due to silver doping

Dey, Pijush Ch.; Ingti, Birson; Bhattacharjee, Amitabha; Choudhury, Manabendra Dutta; Das, Ratan; Nath, S.

doi:10.1002/jobm.202000296

Cited by 9 publications

(4 citation statements)

References 49 publications

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“…Thus, further studies must be conducted related to the compatibility of the biosynthesized nanostructures in our study for possible biomedical or industrial uses; however, several publications have proposed or demonstrated that CdS, Te, S, Au, Ag, and Cu NPs show application in diverse fields such as electronics and photonics (ex. solar cells and sensors), (bio)remediation of soil and water, agriculture, bioimaging, antimicrobial therapy and/or anticancer treatment [43][44][45][46][47][48][49][50][51][52][53][54][55][56].…”

Section: Plos Onementioning

confidence: 99%

Anaerobiosis favors biosynthesis of single and multi-element nanostructures

Ríos-Silva

Pérez²,

Luraschi³

et al. 2022

PLoS ONE

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Herein we report the use of an environmental multimetal(loid)-resistant strain, MF05, to biosynthesize single- or multi-element nanostructures under anaerobic conditions. Inorganic nanostructure synthesis typically requires methodologies and conditions that are harsh and environmentally hazardous. Thus, green/eco-friendly procedures are desirable, where the use of microorganisms and their extracts as bionanofactories is a reliable strategy. First, MF05 was entirely sequenced and identified as an Escherichia coli-related strain with some genetic differences from the traditional BW25113. Secondly, we compared the CdS nanostructure biosynthesis by whole-cell in a design defined minimal culture medium containing sulfite as the only sulfur source to obtain sulfide reduction from a low-cost chalcogen reactant. Under anaerobic conditions, this process was greatly favored, and irregular CdS (ex. 370 nm; em. 520–530 nm) was obtained. When other chalcogenites were tested (selenite and tellurite), only spherical Se0 and elongated Te0 nanostructures were observed by TEM and analyzed by SEM-EDX. In addition, enzymatic-mediated chalcogenite (sulfite, selenite, and tellurite) reduction was assessed by using MF05 crude extracts in anaerobiosis; similar results for nanostructures were obtained; however Se0 and Te0 formation were more regular in shape and cleaner (with less background). Finally, the in vitro nanostructure biosynthesis was assessed with salts of Ag, Au, Cd, and Li alone or in combination with chalcogenites. Several single or binary nanostructures were detected. Our results showed that MF05 is a versatile anaerobic bionanofactory for different types of inorganic NS. synthesis.

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Section: Plos Onementioning

confidence: 99%

Anaerobiosis favors biosynthesis of single and multi-element nanostructures

Ríos-Silva

Pérez²,

Luraschi³

et al. 2022

PLoS ONE

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“…The major difference between the two types is the cell structures and the outer cell membranes. It is understand from the literature that the drug or any material depends upon mainly the nature of membranes of bacteria [83]. S. aureus and E. coli are the two bacterial strains used in the current investigation, the deadly bacteria, which induce various diseases.…”

Section: Antibacterial Studiesmentioning

confidence: 99%

Enhanced Photo-Catalytic and Antibacterial Properties of Ni-Doped Cd0.9Zn0.1S Nanostructures

Jothi¹,

Ganesh

Muthukumaran³

et al. 2021

J Inorg Organomet Polym

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The present work describe the synthesis of Cd 0.9 Zn 0.1 S and Cd 0.87 Zn 0.1 Ni 0.03 S nanostructures by chemical co-precipitation method. The XRD profile proved the cubic crystal structure of the samples without any impurity related phases. The reduced size from 63 to 51 Å and the dissimilarities in lattice parameters and micro-strain has been discussed by Ni addition in Cd 0.87 Zn 0.1 Ni 0.03 S structure. The noticed anomalous optical studies and the elevated transmittance at Ni doped sample suggested them for the fabrication of efficient opto-electronic devices. The energy gap reduction during the substitution of Ni = 3% is explained by the generation of extra energy levels associated with defects within the two bands. The release of additional charge carriers, improved optical property, reduced particle size and more defect generation are responsible for the enhanced photo-catalytic performance of Ni doped Cd 0.9 Zn 0.1 S. The enhanced anti-bacterial capacity in Cd 0.87 Zn 0.1 Ni 0.03 S is described by the collective response of reduced particle size and higher reactive oxygen species (ROS) like O 2 ⋅− , H 2 O 2 and OH ⋅ generating capacity.

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“…Recent studies showed that transition metal sulfides with adjustable spectral characteristics and controlled morphology are very promising bactericidal agents capable of causing severe oxidative stress in bacteria under radiation [ 7 , 8 , 9 ]. At the same time, the development of methods for stabilizing nanoparticles is still relevant.…”

Section: Introductionmentioning

confidence: 99%

“…The ability to produce ROS has a dominant effect on antibacterial efficacy of CdS-based compounds. Antibacterial activity can rather be tuned by doping with metals or shape and size modifications [ 9 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Photoinduced Antibacterial Activity and Cytotoxicity of CdS Stabilized on Mesoporous Aluminosilicates and Silicates

et al. 2022

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Inactivation of bacteria under the influence of visible light in presence of nanostructured materials is an alternative approach to overcome the serious problem of the growing resistance of pathogenic bacteria to antibiotics. Cadmium sulfide quantum dots are superefficient photocatalytic material suitable for visible light transformation. In this work, CdS nanoparticles with size of less than 10 nm (QDs) were synthesized on the surface of natural and synthetic mesoporous aluminosilicates and silicates (halloysite nanotubes, MCM-41, MCM-41/Halloysite, SBA-15). Materials containing 5–7 wt.% of CdS were characterized and tested as agents for photocatalytic bacteria degradation of Gram-positive S. aureus and Gram-negative E. coli with multiple antibiotic resistance. Eukaryotic cell viability tests were also conducted on the model cancer cells A 459. We found that the carrier affects prokaryotic and eukaryotic toxicity of CdS quantum dots. CdS/MCM-41/HNTs were assumed to be less toxic to eukaryotic cells and possess the most prominent photocatalytic antibacterial efficiency. Under visible light irradiation, it induced 100% bacterial growth inhibition at the concentration of 125 μg/mL and the bacteriostatic effect at the concentration of 63 μg/mL. CdS/MCM-41/HNTs showed 100% E. coli growth inhibition in the concentration of 1000 μg/mL under visible light irradiation.

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Enhancement of antibacterial activity of synthesized ligand‐free CdS nanocrystals due to silver doping

Cited by 9 publications

References 49 publications

Anaerobiosis favors biosynthesis of single and multi-element nanostructures

Anaerobiosis favors biosynthesis of single and multi-element nanostructures

Enhanced Photo-Catalytic and Antibacterial Properties of Ni-Doped Cd0.9Zn0.1S Nanostructures

Photoinduced Antibacterial Activity and Cytotoxicity of CdS Stabilized on Mesoporous Aluminosilicates and Silicates

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