Alternating magnetic field and NIR energy conversion on magneto-plasmonic Fe₃O₄@APTES–Ag heterostructures with SERS detection capability and antimicrobial activity

Abstract

Fe3O4@APTES–Ag is a potential multipurpose platform for biological applications such as photomagnetic therapies, analytic probes exploiting the SERS effect and antibacterial activity.

Poly(levodopa)-Functionalized Polysaccharide Hydrogel Enriched in Fe3O4 Particles for Multiple-Purpose Biomedical Applications

“…Heat generation effects were measured on dry binary or ternary composites as well as Ringer's solution-soaked materials to mimic the tissue environment (Figure 4). The detailed characterization of the energy conversion behavior of the stock Fe 3 O 4 nanocubes and Fe 3 O 4 -Ag under 808 nm photostimulation was presented by us elsewhere [38]. As one can observe, dry materials showed reasonable heat induction abilities.…”

“…Hybrid nanoparticles were synthesized in a two-step protocol using cubic magnetite as a core particle involving the previously established procedure [38]: (I) formation of the APTES shell on the surface of core MNPs; (II) deposition of plasmonic silver nanoparticles by a rapid silver cation reduction. Briefly, for the synthesis of APTES-covered Fe 3 O 4 , 50 mg of MNPs in ethanol dispersion was sonicated and transferred to the hexane using centrifugation and washing cycles (three times).…”

Magnetic–Plasmonic Nanocomposites as Versatile Substrates for Surface–enhanced Raman Scattering (SERS) Spectroscopy

“…Kulpa-Greszta et al (2022) investigated Fe 3 O 4 @APTESÀ Ag heterostructures for SERS-based detection and antimicrobial activity, detecting R6G dye down to 0.01 μM and demonstrating significant toxicity against Pseudomonas aeruginosa. [136] For disease biomarker detection, MP nanocomposites show great promise. Alzheimer's disease (AD), characterized by the accumulation of amyloid β (Aβ) and tau proteins, is a major health concern.…”

“…Kulpa–Greszta et al. (2022) investigated Fe 3 O 4 @APTES−Ag heterostructures for SERS‐based detection and antimicrobial activity, detecting R6G dye down to 0.01 μM and demonstrating significant toxicity against Pseudomonas aeruginosa [136] …”