Dendritic Silica Particles with Well-Dispersed Ag Nanoparticles for Robust Antireflective and Antibacterial Nanocoatings on Polymeric Glass

Abstract

Robust nanocoatings with both antireflective (AR) and antibacterial properties for transparent plastic substrates are not only significantly attractive in science but also urgently needed in wide applications. However, it is still a great challenge to realize the fabrication of this kind of multifunctional nanocoatings on plastic/polymer substrates. In this work, a series of single-particle-layered nanocoatings were prepared by partially embedding dendritic fibrous nanosilica (DFNS) with well-dispersed Ag nanoparticles (NPs) onto the surface of poly(methyl methacrylate) (PMMA) polymeric glass via organic vapor treatment. The optimal coated PMMA slide not only exhibits the enhanced transmittance with the highest one of 94.5% but also shows excellent antibacterial activity (at least killing 80% bacteria) toward both Gram-positive Staphylococcus aureus and Gramnegative Escherichia coli. Moreover, both long-term ultrasonic processing and pencil hardness tests proved strong adhesion of particles on PMMA substrate due to partial embedding. This work provides an exploration approach to construct the multifunctional nanocoatings on polymeric substrates for potential applications in various optical devices and daily touch plastic glass.

Ionic Liquid-Functionalized Multiwalled Carbon Nanotube-Based Hydrophobic Coatings for Robust Antibacterial Applications

“…Therefore, numerous drugs have been invented for clinical use against bacterial infections, although the excessive use of antibiotics has sometimes ended up with the emergence of multidrug-resistant (MDR) bacteria. , The MDR bacteria can pose a significant concern for clinical infection and eventually may progress into endemic disease. Sometimes, there is an apprehension of implant-triggered bacterial infections, which can be due to adhesion of bacteria onto the implant surface. − In general, the biofilm-forming bacteria develop an enhanced antimicrobial tolerance against the use of a high dose of antibiotics. Therefore, the advanced functional materials are required to prevent and eradicate the biofilm formations onto the surface of implantable medical devices.…”

Improving the size uniformity of dendritic fibrous nano-silica by a facile one-pot rotating hydrothermal approach

“…Dendritic brous nano-silica (DFNS), [1][2][3][4][5][6] also originally denoted and well-known as KCC-1, [7][8][9][10][11][12][13][14][15][16][17][18][19] possesses unique structural characteristics of three-dimensional (3D) center-radial nanochannels and hierarchical nanopores which give rise to highly accessible internal spaces, open pore channels, large pore volumes, etc. Diverse guest species, such as functional molecules or nano-particles (NPs), could be easily transported through the radial porous architectures to achieve their efficient loading or react with the chemically active sites on these nanochannels.…”

Antibacterial applications and safety issues of silica‐based materials: A review

“…On the issue of drug resistance, silica can be prepared as a hemispherical hollow shell material 71,72 . Drug resistance and bacteriostatic experiments showed that such a material has effectively better antibacterial performance 73‐75 .…”