Low-cost photo-responsive nanocarriers by one-step functionalization of flame-made titania agglomerates withl-Lysine

Abstract

A novel versatile photo-responsive nanocarrier that is able to load and release several functional molecules is obtained by one-step conjugation of scalable flame-made titania agglomerates. Highly crystalline anatase nano-crystals are synthesized by scalable flame spray pyrolysis of organometallic precursor solutions.Nanocarriers are self-assembled by adsorption of lysine molecules on the photocatalytic nanoparticles' surface leading to a minimal flocculation and highly reactive amine terminations. Time-controlled photo-release of the ligand and end-loaded molecules is achieved by short exposure to UV light. The application of these flexible nanoplatforms to intracellular delivery is demonstrated by dye loading and two-photon microscopic in vitro imaging of their penetration in living neurons of Wistar rat brain tissue.These scalable photo-responsive nanocarriers are a flexible platform with potential for in vivo controlled release of amine-reactive dyes and amino-acid modified pro-drugs, as demonstrated by the successful loading and release of fluorescein isothiocyanate dye (FITC) and ketoprofen.

Mussel‐Inspired Dual‐Superlyophobic Biomass Membranes for Selective Oil/Water Separation

“…[22] In contrast, all these absorption peaks were not present in both raw cotton and kapok, which contain only cellulose (in cotton) and lignin (in kapok). [19,23] XPS further confirmed the change of surface chemistry after PDA modification. We observed that only the peaks of C1s and O1s were observed in raw cotton and kapok, whereas a new peak of N1s appeared in both cotton@PDA and KP@PDA ( Figure 3C,D).…”

“…[9] The colors of raw cotton and kapok fibers changed from white (cotton) and light gray (kapok) to dark brown, substantiating the growth of PDA on the fibers. [19] Moreover, the catechol and amine groups of PDA improved the hydrophilicity of kapok, which can be easily wetted by water and sunk into water after the modification (Figure S1, Supporting Information). [20] The chemical compositions of raw cotton, raw kapok, cotton@PDA, and KP@PDA were investigated by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectrometer (XPS) analyses.…”

The enhanced ferromagnetism of single-layer CrX3 (X = Br and I) via van der Waals engineering

“…The optimized in-plane parameters for CrBr 3 , CrI 3 , silicene and germanene are 6.345, 6.875, 3.845 and 4.017 Å, which are consistent with previous reports. [11,29,41] The Ge/CrI 3 , Si/CrI 3 and Si/CrBr 3 heterostructure slabs are constructed by 3×3 Mene supercell to match the CrX 3 single-layer, and the lattice mismatch is 1.2%, 3.2% and 5.0%, respectively.…”

Excellent Capacitive Performance of a Three‐Dimensional Hierarchical Porous Graphene/Carbon Composite with a Superhigh Surface Area

“…From the discharge curve measured with the two-electrode system, the energy density (E) and power density (P) were calculated as follows: [36] E ¼ I…”