title: Smart Antibacterial Surface Made by Photopolymerization.
abstract: On the basis of the use of photopolymerization technology, a facile and reliable method for in situ preparation of silver nanoparticles (AgNPs) within PNIPAAm functional surfaces is presented as a means to achieve nonfouling, antibacterial films. The surface properties were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), water contact angle, and thermogravimetric analysis (TGA). The antibacterial and release properties of the surfaces were tested against E. coli: at 37 °C (above the LCST of PNIPAAm), the functional films facilitated the attachment of bacteria, which were then killed by the AgNPs. Changing temperature to 4 °C (below the LCST), swollen PNIPAAm chains led the release of dead bacteria. The results showed that AgNPs/PNIPAAm hybrid surfaces offer a "smart" antibacterial capability in response to the change of environmental temperature.
authors.forename: Haitao
authors.initials: H
authors.lastname: Yang
authors.forename: Guofeng
authors.initials: G
authors.lastname: Li
authors.affiliation: School of Dental Medicine, University of Colorado , Denver, Colorado 80045, United States.
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Stansbury
authors.forename: Xiaoqun
authors.initials: X
authors.lastname: Zhu
authors.forename: Xing
authors.initials: X
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Nie
keywords: Surface modification; antimicrobial; photopolymerization; poly(N-isopropylacrylamide); silver nanoparticles