Antimicrobial activity of metal oxide nanoparticles against Gram-positive and Gram-negative bacteria: a comparative study

Azam, Ameer; Ahmed, Arham S.; Oves, Mohammad; Khan, Mohammad Saghir; Habib, Sami S.; Memić, Adnan

doi:10.2147/ijn.s35347

Cited by 1,128 publications

(631 citation statements)

References 27 publications

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“…It is acclaimed that Silver ions and Silver-based compounds have potent antimicrobial activity. Present study confers with the study of Azam et al [33] revealed that antibacterial activities of AgNPs were significantly high as compared to silver nitrate and standard antibiotic may be due to their increased surface area. Therefore, these AgNPs can be used in low doses for antimicrobial treatment in comparison to standard antimicrobial agents.…”

Section: Resultssupporting

confidence: 73%

Synthesis, Characterization and Antimicrobial Activity of Abelia grandiflora Assisted AgNPs

Sharma¹,

Jasuja²,

Rajgovind³

et al. 2014

Microb Biochem Technol

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In past few years, wide applicability of silver nanoparticles (AgNPs) in various field attract for an approach of rapid, cost effective and eco-friendly synthesis of AgNPs that is expanding research toward biological methods. The biosynthesised AgNPs were confirmed visually by appearance of dark brown color formation in mixture and silver surface plasmon resonance band observed at 413 nm by using UV-Visible Spectroscopy A. grandiflora may be used for the green synthesis of ultra-fine nanoparticles of silver for their antimicrobial activities.

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Section: Resultssupporting

confidence: 73%

Synthesis, Characterization and Antimicrobial Activity of Abelia grandiflora Assisted AgNPs

Sharma¹,

Jasuja²,

Rajgovind³

et al. 2014

Microb Biochem Technol

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“…Following this strategy, the expected biological effects would arise from the release of the bio-active metallic salt into the surrounding media. It hasis indeed been established that some metallic salts and/or organometallic complexes may have biological effects including bactericidal 21,22,23 (e.g. Ag, Co, Cu) or anti-cancer actions 24,25 (e.g.…”

Section: Introductionmentioning

confidence: 99%

Silver-Based Hybrid Materials from meta- or para-Phosphonobenzoic Acid: Influence of the Topology on Silver Release in Water

et al. 2015

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(Word Style "BD_Abstract").Three novel silver-based Metal Organic Frameworks materials which were synthesized from either 3-phosphono or 4-phosphonobenzoic acid and silver nitrate are reported. The novel hybrids were synthesized under hydrothermal conditions; the pH of the reaction media was controlled by adding different quantities of urea thereby producing different topologies.Compound 1 (Ag3(4-PO3-C6H4-COO)), synthesised in presence of urea, exhibits a compact 3D structure in which both phosphonic acid and carboxylic acid functional groups are linked to the silver-based inorganic network. Compound 2 (Ag(4-PO3H-C6H4-COOH)), which was synthesized at lower pH (without urea), has a layered structure in which only the phosphonic acid functional groups from 4-phosphonobenzoic acid moieties are linked to the silver inorganic network; the carboxylic acid groups being engaged in hydrogen bonds. Finally, material 3 (Ag(3-PO3H-C6H4-COOH)) was synthesised from 3-phosphonobenzoic acid and silver nitrate without urea. This material 3 features a layered structure exhibiting carboxylic acid functional groups linked via hydrogen bonds in the interlayer space. After the full characterization of these materials (single X-ray structure, IR, TGA), their ability to release silver salts in aqueous environment was measured. Silver release, determined in aqueous solution by cathodic stripping voltammetry, shows that the silver release capacity of these materials is dependent on the topology of the hybrids. The more compact structure 1 is extremely stable in water with only trace levels of silver ions being detected. On the other hand, compounds 2 and 3, in which only the phosphonic acid functional groups were bonded to the inorganic network, released larger quantities of silver ions into aqueous solution. These results which were compared with the silver release of the previously described compound 4 (Ag6(3-PO3-C6H4-COO)2). The results clearly show that the release capacity of silver-based metal organic framework can be tuned by 3 modifying their topology which, in the present study, is governed by the regio-isomer of the organic precursor and the synthetic conditions under which the hybrids are prepared.4

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“…XRD peaks can be well indexed to -Fe 2 O 3 crystals and rhombohedral phase with JCPDS card number 33-0664. Sharp, strong, and well-resolved diffraction peaks reveal the phase purity and crystalline structure of as-prepared nanomaterial [18,19]. FTIR spectrum analysis of as-synthesized NPs was done for further confirmation.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Nontoxic Hollow Iron Oxide (α-Fe2O

Riasat

Nie

2016

Journal of Nanomaterials

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Hollow spheres of iron oxide ( -Fe2O 3 ) were successfully synthesized in a simple one-pot synthesis by using hydrothermal method. Iron salt was dissolved together with glucose in water and then the mixture was heated to 180 ∘ C in an autoclave at 12 and 24 hours of synthesis time separately. Carbon spheres were formed with the metal ions into their hydrophilic shell after the hydrothermal approach. Hollow -Fe 2 O 3 spheres of around 200 to 300 nm size were formed after the calcination that lead to the removal of carbon. Size of nanoparticles, surface area, and thickness of the -Fe 2 O 3 shell can be precisely controlled by controlling the ratio of iron and glucose. Increasing the reaction time will decrease the shell thickness. Phase confirmation and crystalline structure of these nanoparticles were done by XRD. Surface morphology was characterized by SEM and TEM analysis showed the hollow spheres inside and a shell of -Fe 2 O 3 . Further confirmation was done by EDX and FTIR analysis. Iron content was measured by ICP-OES. Cytotoxicity was done by using CCK-8 assay kit in the Hep G-2 cell line showing the nontoxic behavior of -Fe 2 O 3 nanoparticles. The as-prepared nanoparticles can be exploited in a number of applications in areas ranging from medicine to pharmaceutics to material science.

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Antimicrobial activity of metal oxide nanoparticles against Gram-positive and Gram-negative bacteria: a comparative study

Cited by 1,128 publications

References 27 publications

Synthesis, Characterization and Antimicrobial Activity of Abelia grandiflora Assisted AgNPs

Synthesis, Characterization and Antimicrobial Activity of Abelia grandiflora Assisted AgNPs

Silver-Based Hybrid Materials from meta- or para-Phosphonobenzoic Acid: Influence of the Topology on Silver Release in Water

Synthesis and Characterization of Nontoxic Hollow Iron Oxide (α-Fe2O

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