Nanoparticulate Iron Oxide Tubes from Microporous Organic Nanotubes as Stable Anode Materials for Lithium Ion Batteries

Abstract

Tubes from tubes: Microporous organic nanotubes were prepared by Sonogashira coupling between tetrakis(4‐ethynylphenyl)methane and N,N′‐di(4‐iodophenyl)‐4,4′‐bipyridinium dichloride. These nanotubes were used as a template for secondary inorganic materials, namely Fe2O3 nanotubes with a high discharge capacity and excellent stability.

In vitro study of the interaction of heregulin-functionalized magnetic–optical nanorods with MCF7 and MDA-MB-231 cells

“…A third 5-hour anodization step produced highly ordered PAA template. The PAA was removed by immersing in saturated mercury chloride 5 aqueous solution for 4 hours. The as-prepared PAA membrane was then immersed in phosphoric acid solution for pore widening for 10 min resulting in a pore diameter of approximately 60 nm.…”

“…Imaging was conducted at 1 fps. Nanorods with a velocity lower than 15 µm/s and with a trajectory that 5 traverses the cell area were considered for cell targeting analysis. For HRG competition experiments, MCF7 cells in microfluidic devices were incubated with medium containing soluble HRG at varying concentrations for 15 minutes.…”

“…When this light was analyzed a relatively large portion of the light passed through the analyzer maximizing the observed intensity. The relative intensity of light transferred through the polarization microscope provides a powerful technique that enabled the orientation of sub-wavelength nanorods to be defined in the far-field without visualization of the Fe section of 5 the rod.…”

“…'Active zones', dynamic extrusions in the cell periphery, attracted both HRG-conjugated rods, and to a lesser extent, STR-conjugated rods. HRG-conjugated rods targeted active zones six times 5 more often than rest of the cell surface (30.7±7.9 vs. 4.9±0.8 rods per 1000 µm 2 , p < 0.005), whereas STR-conjugated rods targeted active zones 3× more often than rest of the cell surface (18.8±4.5 vs. 6.3±0.8 rods per 1000 µm 2 ; p < 0.01). These results suggest that cells expressing specific surface receptors can be targeted with Fe-Au nanorods whose tips are functionalized with appropriate ligands.…”

“…4 Superparamagnetic iron oxide nanoparticles (SPIONs) have also been used for targeting and imaging of specific cancers in vivo 3 and the fact that these nanomaterials also adsorb magnetic radiation has led to their use as agents for hypothermia therapy. 5,6 Targeting of specific cell types in vivo for diagnostic and therapeutic purposes has remained a challenge due to the 30 numerous macromolecular components of blood that adsorb on nanoparticles and the body's multiple mechanisms for clearing nanoparticles from the circulation. 7,8 Nanoparticle surfaces are typically coated with a polymer monolayer, such as, dextran or polyethyleneglycol (PEG), to improve their stability and biocompatibility, and prolong their blood half-life.…”