Introducing Na-sufficient P3-NaFeMnO as a cathode material for Na-ion batteries.

P3-Na0.9Fe0.5Mn0.

Nanobiosensor design utilizing a periplasmic E. coli receptor protein immobilized within Au/polycarbonate nanopores.

A new type of nanopore sensor design is reported for a reagent-less electrochemical biosensor with no analyte "tagging" by fluorescent molecules, nanoparticles, or other species. This sensor design involves immobilization within Au-coated nanopores of bacterial periplasmic binding proteins (bPBP), which undergo a wide-amplitude, hinge-twist motion upon ligand binding. Ligand binding thus triggers a reduction in the effective thickness of the immobilized protein film, which is detected as an increase in electrolyte conductivity (decrease in impedance) through the nanopores.