Attenuation of UV absorption by poly(lactic acid)-iron oxide nanocomposite particles and their potential application in sunscreens

One-Step Hydrothermal Synthesis of Nitrogen-Doped Carbonized Polymer Dots with Full-Band Absorption for Skin Protection

“…16 Chemical sunscreen is the use of organic compounds, including para-aminobenzoic acid, salicylic acid, cinnamic acid, phenyl ketones, and so forth. 7 employment of 24 kinds of UV absorbers in the "Hygienic Standard for Cosmetics 2002", 17 73% of UV absorbers have an absorption range between 200 and 340 nm, and only 26% of UV absorbers are between 300 and 380 nm. However, organic UV absorbers are still unable to achieve the full-band absorption of sunscreens.…”

Antibacterial Activity of Positively and Negatively Charged Hematite (α-Fe2O3) Nanoparticles to Escherichia coli, Staphylococcus aureus and Vibrio fischeri

“…Hematite ( α -Fe 2 O 3 ) is the most stable among iron oxides, as it is thermodynamically stable at ambient conditions, chemically stable at various pH [ 3 , 27 , 28 , 29 ], and can be synthesized by simple aqueous (green) approaches [ 31 , 32 ] in various shapes and with a broad size range [ 25 ]. Hematite NPs have gained a lot of attention due to their diverse applications, e.g., photoelectrochemical water splitting [ 33 ], as ingredients in sunscreens and cosmetics to optimize the present UV filter efficiency [ 34 , 35 ], and as anticancer [ 20 , 21 , 22 , 23 ] and water disinfection agents [ 36 ]. The production and application of NPs necessitate the safety evaluation of these materials that unfortunately always lags behind the respective technological developments [ 37 ].…”

ZnFe2O4 Magnetic Nanoparticle–Polydiacetylene–Zinc(II) Composites for Real-Time Nanothermometers and Localizable Acid/Base Sensors

“…Materials with high magnetism such as pure metals (e.g., cobalt, nickel, and iron), alloys (e.g., CoPt and FePt), and metal oxides (e.g., Fe 3 O 4 , Co 3 O 4 , and NiO) have the potential to be produced as magnetic nanoparticles (MNPs). , Iron oxides such as magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ) are some of the most studied MNPs because of their high chemical stability, biocompatibility, and low cost. , They have been applied as diagnostic [e.g., as a contrast agent for magnetic resonance imaging (MRI)] and therapeutic (e.g., drug delivery and hyperthermia) agents. − In addition, the strong reducing property, high surface-to-volume ratio, and surface modification allow utilization of these materials as nanosorbents and photocatalysts. , Iron oxide MNPs have been incorporated in various polymeric matrices and other materials to produce magnetic nanocomposites (MNCs). − This class of materials has shown potential in various applications such as sensors, cancer therapy, drug delivery, anticounterfeiting materials, anticorrosion coatings, flame retardants, and UV protectors …”

“…14−22 This class of materials has shown potential in various applications such as sensors, 16 cancer therapy, 17 drug delivery, 18 anticounterfeiting materials, 19 anticorrosion coatings, 20 flame retardants, 21 and UV protectors. 22 Recently, the fabrication and use of PDA/Fe 3 O 4 -MNCs have been explored. 23−27 These types of MNCs provide colorresponsive and magnetic properties that allow facile handling, localization, and isolation by the application of a magnetic field.…”