One-step synthesis of size-tunable Ag nanoparticles incorporated in electrospun PVA/cyclodextrin nanofibers

Date
2014
Advisor
Instructor
Source Title
Carbohydrate Polymers
Print ISSN
0144-8617
Electronic ISSN
Publisher
Pergamon Press
Volume
99
Issue
Pages
808 - 816
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

One-step synthesis of size-tunable silver nanoparticles (Ag-NP) incorporated into electrospun nanofibers was achieved. Initially, in situ reduction of silver salt (AgNO3) to Ag-NP was carried out in aqueous solution of polyvinyl alcohol (PVA). Here, PVA was used as reducing agent and stabilizing polymer as well as electrospinning polymeric matrix for the fabrication of PVA/Ag-NP nanofibers. Afterwards, hydroxypropyl-beta-cyclodextrin (HPβCD) was used as an additional reducing and stabilizing agent in order to control size and uniform dispersion of Ag-NP. The size of Ag-NP was ∼8 nm and some Ag-NP aggregates were observed for PVA/Ag-NP nanofibers, conversely, the size of Ag-NP decreased from ∼8 nm down to ∼2 nm within the fiber matrix without aggregation were attained for PVA/HPβCD nanofibers. The PVA/Ag-NP and PVA/HPβCD/Ag-NP nanofibers exhibited surface enhanced Raman scattering (SERS) effect. Moreover, antibacterial properties of PVA/Ag-NP and PVA/HPβCD/Ag-NP nanofibrous mats were tested against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria.

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Keywords
Cyclodextrin, Electrospinning, Nanofibers, Polyvinyl alcohol (PVA), Silver nanoparticles (Ag-NP), Antibacterial properties, Electrospun nanofibers, Poly (vinyl alcohol) (PVA), Silver nanoparticles, Stabilizing agents, Staphylococcus aureus, Surface enhanced Raman Scattering (SERS), Uniform dispersions, Bacteria, Cyclodextrins, Electrospinning, Escherichia coli, Nanofibers, Nanoparticles, Polyvinyl alcohols, Surface scattering, Silver, Bacteria (microorganisms), Escherichia coli, Negibacteria, Posibacteria, Staphylococcus aureus, 2 hydroxypropyl beta cyclodextrin, 2-hydroxypropyl-beta-cyclodextrin, Antiinfective agent, Beta cyclodextrin derivative, Cyclodextrin, Metal nanoparticle, Nanofiber, Polyvinyl alcohol, Silver, Article, Chemistry, Drug effect, Electrochemical analysis, Electrospinning, Escherichia coli, Growth, development and aging, Oxidation reduction reaction, Particle size, Polyvinyl alcohol (PVA), Raman spectrometry, scanning electron microscopy, Silver nanoparticles (Ag-NP), Staphylococcus aureus, Surface property, Ultrastructure, Cyclodextrin, Electrospinning, Nanofibers, Polyvinyl alcohol (PVA), Silver nanoparticles (Ag-NP), Anti-Bacterial Agents, Beta-Cyclodextrins, Electrochemical Techniques, Escherichia coli, Metal Nanoparticles, Microscopy, Electron, Scanning, Nanofibers, Oxidation-Reduction, Particle Size, Polyvinyl Alcohol, Silver, Spectrum Analysis, Raman, Staphylococcus aureus, Surface Properties
Citation
Published Version (Please cite this version)