Sonochemical coating of paper by microbiocidal silver nanoparticles

Ronen Gottesman, Sourabh Shukla, Nina Perkas, Leonid A. Solovyov, Yeshayahu Nitzan, Aharon Gedanken*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

158 Scopus citations

Abstract

Colloidal silver has gained wide acceptance as an antimicrobial agent, and various substrates coated with nanosilver such as fabrics, plastics, and metal have been shown to develop antimicrobial properties. Here, a simple method to develop coating of colloidal silver on paper using ultrasonic radiation is presented, and the coatings are characterized using X-ray diffraction (XRD), high resolution scanning electron microscope (HRSEM), and thermogravimetry (TGA) measurements. Depending on the variables such as precursor concentrations and ultrasonication time, uniform coatings ranging from 90 to 150 nm in thickness have been achieved. Focused ion beam (FIB) cross section imaging measurements revealed that silver nanoparticles penetrated the paper surface to a depth of more than 1 μm, resulting in highly stable coatings. The coated paper demonstrated antibacterial activity against E. coli and S. aureus, suggesting its potential application as a food packing material for longer shelf life.

Original languageAmerican English
Pages (from-to)720-726
Number of pages7
JournalLangmuir
Volume27
Issue number2
DOIs
StatePublished - 18 Jan 2011
Externally publishedYes

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