Assessment of growth of silver nanoparticles synthesized from an ethylene glycol–silver nitrate–polyvinylpyrrolidone solution

Slistan-Grijalva, A.; Herrera-Urbina, R.; Rivas-Silva, J.F.; Ávalos-Borja, M.; Castillón-Barraza, F.F.; Posada-Amarillas, Álvaro

doi:10.1016/j.physe.2004.07.010

Cited by 96 publications

(39 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Namely, it is well known that the peak in the 400-420 nm range is characteristic for spherical silver nanoparticles, due to the surface plasmon resonance effect. [37][38][39][40] Raman spectroscopy verified incorporation of graphene by appearance of characteristic bands at 1370 cm −1 (Raman D-band) and 1580 cm −1 (G-band). [24] …”

Section: Preparation Of Pva/gr Hydrogelsmentioning

confidence: 94%

Graphene Based Composite Hydrogel for Biomedical Applications

Nešović¹,

Abudabbus²,

Rhee³

et al. 2017

Croat. Chem. Acta

View full text Add to dashboard Cite

In this work, composite hydrogel consisting of poly(vinyl alcohol), graphene and silver nanoparticles, (Ag/PVA/Gr), was prepared by the immobilization of silver nanoparticles (AgNPs) in PVA/Gr hydrogel matrix in two steps. The first step was cross linking of the PVA/Gr colloid solution by the freezing/thawing method, while in the second step, in situ electrochemical method was used to incorporate AgNPs inside the PVA/Gr hydrogel matrix. We used UV-vis spectroscopy, cyclic voltammetry, Raman spectroscopy, DSC analysis, as well as test of cytotoxicity and antibacterial activity, to characterize obtained Ag/PVA/Gr hydrogel. It was shown that graphene-based composite hydrogel with incorporated AgNPs is non toxic biomaterial with antibacterial activity, with a potential for use in biomedical purposes.

show abstract

Section: Preparation Of Pva/gr Hydrogelsmentioning

confidence: 94%

Graphene Based Composite Hydrogel for Biomedical Applications

Nešović¹,

Abudabbus²,

Rhee³

et al. 2017

Croat. Chem. Acta

View full text Add to dashboard Cite

show abstract

“…These step changes coincided with the slope changes in the plot of the corresponding absorbance versus reaction time, signifying the existence of three distinct stages of particle formation. Silvert et al 13 and Slistan-Grijalva et al, 14 who synthesized silver nanoparticles in a bulk EG containing PVP at 120 C for 22 h and at 27 C for 67 h, respectively, proposed slightly different particle formation mechanisms. Nucleation in the rst stage, particle growth in the second stage, and further growth by Ostwald ripening in the third stage were proposed by Silvert et al, whereas simultaneous nucleation and particle growth in the early stage and only particle growth in the later stage were proposed by Slistan-Grijalva et al The three-stage particle formation identied in the UV-vis spectra was further examined by measuring particle size as a function of a reaction time, as seen in Fig.…”

Section: % Eg Binary Polyol Synthesismentioning

confidence: 99%

Water-based binary polyol process for the controllable synthesis of silver nanoparticles inhibiting human and foodborne pathogenic bacteria

2018

View full text Add to dashboard Cite

aThe polyol process is a widely used strategy for producing nanoparticles from various reducible metallic precursors; however, it requires a bulk polyol liquid reaction with additional protective agents at high temperatures. Here, we report a water-based binary polyol process using low concentrations of highmolecular-weight polyethylene glycol (100 000 g mol À1, 2 wt%) and ethylene glycol (5 wt%). The entangled conformation of the polyethylene glycol in water and the increased number of reducing sites by the ethylene glycol cooperatively contributed to the stability and effectiveness of reduction reaction and particle growth, producing uniformly sized silver nanoparticles (15.8 AE 2.2 nm) with no additional protective agents at a mild temperature of 80 C. The measurement of particle size throughout the reaction and the dependence of the optical density of a silver colloidal solution on the concentration of ethylene glycol revealed three stages of particle growth. The minimum inhibitory concentrations of the purified silver nanoparticles against four representative human and foodborne pathogenic bacteria-S.aureus, P. aeruginosa, S. enterica, and E. coli-were 4.7, 2.3, 2.3, and 1.2 mg mL À1, respectively.

show abstract

“…They are followed by the controlled aggregation of the material. [9] These methods perform the synthesis in different environments: microemulsions, [17][18][19][20][21][22] solution, [10,13,23] a solid matrix, [24] etc. They use a number of reducing agents, including alcohols, hydrazine, polyols, borohydrides, light, sound waves, etc.…”

Section: Introductionmentioning

confidence: 99%