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Author Saquing, Carl D. ♦ Manasco, Joshua L. ♦ Khan, Saad A.
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher Wiley-VCH
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Technology ♦ Medicine & health ♦ Human physiology ♦ Pharmacology and therapeutics ♦ Agriculture & related technologies
Subject Domain (in MeSH) Inorganic Chemicals ♦ Organic Chemicals ♦ Chemicals and Drugs ♦ Physical Phenomena ♦ Biological Sciences ♦ Natural Science Disciplines ♦ Physical Sciences ♦ Technology, Industry, and Agriculture ♦ Technology and Food and Beverages
Subject Keyword Discipline Nanotechnology ♦ Metal Nanoparticles ♦ Chemistry ♦ Polyethylene Glycols ♦ Silver ♦ Electric Conductivity ♦ Nanotechnology ♦ Journal Article ♦ Research Support, U.s. Gov't, Non-p.h.s.
Abstract A facile approach to synthesize and incorporate metal nanoparticles (NPs) into electrospun polymer nanofibers (NFs) wherein the electrospinning polymer acts as both a reducing agent for the metal salt precursor, as well as a protecting and templating agent for the ensuing NPs, is reported. Such a true one-step process at ambient conditions and free of organic solvents is demonstrated using a system comprising $AgNO_{3}$ and poly(ethylene oxide) (PEO) at electrospinnable molecular weights of 600, 1000, or 2000 kDa. The PEO transforms $Ag^{+}$ into AgNPs, a phenomenon that has not been previously possible at PEO molecular weights less than 20 kDa without the addition of a separate reducing agent and stabilizer or the application of heat. Results from X-ray photoelectron spectroscopy and UV–Vis absorption spectrophotometry analyses support the formation of pseudo-crown ethers in high molecular weight PEO as the mechanism in the development of NPs. The AgNPs reduce fiber diameter and enhance fiber quality (reduced beading) due to increased electrical conductivity. Interestingly, several of the NFs exhibit AgNP-localized nanochain formation and protrusion from the NF surface that can be attributed to the combined effect of applied electrical field on the polymer and the differences between the electrical conductivity and polarizability of the polymer and metal NPs.
Description Country affiliation: United States
Author Affiliation: Saquing CD ( Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh, NC 27695-7905, USA.)
ISSN 16136810
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-04-01
Publisher Place Germany
e-ISSN 16136829
Journal Small
Volume Number 5
Issue Number 8

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Source: WHO-Global Index Medicus