Self-Healing, antibacterial and sensing nanoparticle coating and its excellent optical applications

Self-healing, antibacterial and metal-ion sensing coatings with nanoparticles were developed using layer-by-layer (LbL) self-assembly technique via host-guest interaction. The coatings consist of MoS2 nanosheets, beta-cyclodextrin (beta-CD)-modified poly (ethylenimine) (PEI) and adamantane (AD)modified poly (acrylic acid) (PAA). Damages to conventional coatings results in cracking and affects the coatings' ability to maintain antibacterial and sensing qualities. The prepared MoS2/beta-CD-PEI/AD-PAA self-healing coatings are not only able to greatly suppress bacterial adhesion and have excellent antibacterial property, particularly under UV light irradiation, but also have a longtime service time. Moreover, the self-healing coatings first applied the fluorescence quenching for detecting heavy metals (Co2+). Fluorescence spectra demonstrated that a linear relationship existed between the fluorescence intensity and the Co2+ concentration with 0 similar to 0.1 ug/mL and the detection limit of Co2+ is 0.018 mg/mL. Therefore, the nanoparticle multilayer polyelectrolyte hybrid coatings have a potential application in food industries. (C) 2017 Elsevier B.V. All rights reserved.