Magnetically Separable Photoactive Nanofiber Membranes for Photocatalytic and Antibacterial Applications

Abstract

We have prepared photoactive multifunctional nanofiber membranes via the simple electrospinning method. The antibacterial and photocatalytic properties of these materials are based on the generation of singlet oxygen formed by processes photosensitized by the tetraphenylporphyrin encapsulated in the nanofibers. The addition of magnetic features in the form of magnetic maghemite (γ-Fe2O3) nanoparticles stabilized by polyethylenimine enables additional functionalities, namely, the postirradiation formation of hydrogen peroxide and improved photothermal properties. This hybrid material allows for remote manipulation by a magnetic field, even in hazardous and/or highly microbial contaminant environments.

Advances in the use of cell-membrane encapsulated nanoparticles to target tumor drugs

“…The concept of cell membrane-encapsulated nanoparticles is an innovative nanotechnology that employs cellular membranes as the outer casings for nanoparticles, endowing them with attributes akin to natural cells. This strategy melds the physical, chemical, and biological properties of nanomaterials with the biocompatibility and bioactivity intrinsic to cell membranes, fostering a promising avenue of exploration [15,16]. The process of crafting nanoparticles enveloped by cell membranes typically involves two steps: first, core nanoparticles, such as metallic nanoparticles and drug carriers, are fabricated using nanotechnology; subsequently, these core nanoparticles are ensheathed or coated with cell membranes.…”