Stable silver colloidal dispersions using short chain polyethylene glycol

Popa, Mónica; Pradell, Trinitat; Crespo, Daniel; Calderón-Moreno, José Maria

doi:10.1016/j.colsurfa.2007.03.050

Cited by 157 publications

(112 citation statements)

References 51 publications

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“…25,26 Such synthesis protocols can pose a serious threat to environment and also cause biological hazards. Further, high surface area-to-volume ratio of Ag NPs causes them to cling together with passage of time, thereby limiting their potential applications.…”

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confidence: 99%

Linseed hydrogel-mediated green synthesis of silver nanoparticles for antimicrobial and wound-dressing applications

Haseeb¹,

Hussain²,

Abbas³

et al. 2017

IJN

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Polysaccharides are being extensively employed for the synthesis of silver nanoparticles (Ag NPs) having diverse morphology and applications. Herein, we present a novel and green synthesis of Ag NPs without using any physical reaction conditions. Linseed hydrogel (LSH) was used as a template to reduce Ag + to Ag 0 . AgNO 3 (10, 20, and 30 mmol) solutions were mixed with LSH suspension in deionized water and exposed to diffused sunlight. Reaction was monitored by noting the change in the color of reaction mixture up to 10 h. Ag NPs showed characteristic ultraviolet-visible (UV/Vis) absorptions from 410 to 437 nm in the case of sunlight and 397–410 nm in the case of temperature study. Transmission electron microscopy images revealed the formation of spherical Ag NPs in the range of 10–35 nm. Face-centered cubic array of Ag NPs was confirmed by characteristic diffraction peaks in powder X-ray diffraction spectrum. Ag NPs were stored in LSH thin films, and UV/Vis spectra recorded after 6 months indicated that Ag NPs retained their texture over the storage period. Significant antimicrobial activity was observed when microbial cultures (bacteria and fungi) were exposed to the synthesized Ag NPs. Wound-healing studies revealed that Ag NP–impregnated LSH thin films could have potential applications as an antimicrobial dressing in wound management procedures.

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mentioning

confidence: 99%

Linseed hydrogel-mediated green synthesis of silver nanoparticles for antimicrobial and wound-dressing applications

Haseeb¹,

Hussain²,

Abbas³

et al. 2017

IJN

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“…Silver nanoparticles have also drawn much attention because they show high bactericidal effects [5][6][7][8][9]. Various approaches to synthesis metal nanoparticles have been reported such as chemical reduction, UV photolysis, gamma irradiation, metal vapor deposition, laser ablation, sputtering… Among these, chemical reduction has been the most extensively investigated [1,2].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticles and silver colloidal solutions

Phong

Minh

Thanh

et al. 2009

J. Phys.: Conf. Ser.

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“…16,17 The synthesis of Ag NPs by the chemical reduction method involves toxic solvents, 18 dangerous reducing agents like sodium borohydride, 19,20 and synthetic/nonbiodegradable stabilizing agents. 21,22 Such synthesis strategies may also result in biological hazards and environmental toxicity. Secondly, Ag NPs have a high surface area-to-volume ratio, resulting in their aggregation with the passage of time that limits their potential…”

Section: Introductionmentioning

confidence: 99%

Hydroxypropylcellulose as a novel green reservoir for the synthesis, stabilization, and storage of silver nanoparticles

Hussain¹,

Shah²,

Jantan³

et al. 2015

IJN

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Polysaccharides are attracting the vigil eye of researchers in order to design the green synthesis of silver nanoparticles (Ag NPs) of diverse size, shape, and application. We report an environmentally friendly method to synthesize Ag NPs where no physical reaction conditions were employed. Hydroxypropylcellulose (HPC) was used as a template nanoreactor, stabilizer, and capping agent to obtain Ag NPs. Different concentrations of AgNO 3 solutions (50 mmol, 75 mmol, and 100 mmol) were mixed with a concentrated aqueous solution of HPC and the progress of the reaction was monitored by noting color changes of the reaction mixture at different reaction times for up to 24 hours. Characteristic ultraviolet–visible spectroscopy (UV/Vis) absorption bands of Ag NPs were observed in the range of 388–452 nm. The morphology of the Ag NPs was studied by scanning electron microscopy, transmission electron microscopy (TEM), and atomic force microscopy. The TEM images confirmed that the size of the Ag NPs was in the range of 25–55 nm. Powder X-ray diffraction studies showed that the crystal phase of the Ag NPs was face-centered cubic. The as-prepared Ag NPs were found to be stable, and no changes in size and morphology were observed after storage in HPC thin films over 1 year, as indicated by UV/Vis spectra. So, the present work furnishes a green and economical strategy for the synthesis and storage of stable Ag NPs. As-synthesized Ag NPs showed significant antimicrobial activity against different bacterial ( Escherichia coli, Staphylococcus epidermidis, S. aureus, Bacillus subtilis, Pseudomonas aeruginosa ) and fungal strains ( Actinomycetes and Aspergillus niger ).

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Stable silver colloidal dispersions using short chain polyethylene glycol

Cited by 157 publications

References 51 publications

Linseed hydrogel-mediated green synthesis of silver nanoparticles for antimicrobial and wound-dressing applications

Linseed hydrogel-mediated green synthesis of silver nanoparticles for antimicrobial and wound-dressing applications

Green synthesis of silver nanoparticles and silver colloidal solutions

Hydroxypropylcellulose as a novel green reservoir for the synthesis, stabilization, and storage of silver nanoparticles

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