title: Sonochemical coating of paper by microbiocidal silver nanoparticles.
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.
authors.affiliation: Department of Chemistry, Kanbar Laboratory for Nanomaterials, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Ronen
authors.initials: R
authors.lastname: Gottesman
authors.forename: Sourabh
authors.initials: S
authors.lastname: Shukla
authors.forename: Nina
authors.initials: N
authors.lastname: Perkas
authors.forename: Leonid A
authors.initials: LA
authors.lastname: Solovyov
authors.forename: Yeshayahu
authors.initials: Y
authors.lastname: Nitzan
authors.forename: Aharon
authors.initials: A
authors.lastname: Gedanken
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000494:pharmacology; D004926:Escherichia coli / Q000187:drug effects; D053768:Metal Nanoparticles / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D010209:Paper; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000187:drug effects; D013499:Surface Properties; D014465:Ultrasonics; D014961:X-Ray Diffraction
chemical_list: D000890:Anti-Infective Agents; D012834:Silver