Strong near-infrared upconversion luminescence of the Er/Y co-doped YbVO phosphor for multimode optical temperature measurement.

This study explored the enhancement of near-infrared emissions in YbVO: Er through Y ion doping under a 980 nm laser excitation. The phosphor exhibits weak green emissions at 527 nm (H → I) and 553 nm (S → I), red emissions at 654 nm (F → I), and a strong near-infrared emission at 803 nm (I → I). Optimal doping concentration of Y ion in YbVO: 0.

Glucose oxidase immobilized in alginate/layered double hydroxides hybrid membrane and its biosensing application.

A new type of amperometric glucose biosensor based on alginate (Alg)/layered double hydroxides (LDHs) organic-inorganic composite film is described. This hybrid material combines the advantages of an organic biopolymer, Alg and inorganic LDHs. Glucose oxidase (GOD) immobilized in the material maintained its activity.

Inhibitive detection of benzoic acid using a novel phenols biosensor based on polyaniline-polyacrylonitrile composite matrix.

A novel sensitive and stable phenols amperometric biosensor, based on polyaniline-polyacrylonitrile composite matrix, was applied for determination of benzoic acid. The electrochemical biosensor functioning was based on the inhibition effect of benzoic acid on the biocatalytic activity of the polyphenol oxidase (PPO) to its substrate (catechol) in 0.1M phosphate buffer solution (pH 6.

Studies on direct electron transfer and biocatalytic properties of hemoglobin in polyacrylonitrile matrix.

The direct electrochemistry of hemoglobin (Hb) immobilized in polyacrylonitrile (PAN) modified glassy carbon electrode was described. The protein-PAN film exhibited a pair of well-defined and quasi-reversible cyclic voltammetric peaks for Hb Fe(III)/Fe(II) redox couple in a pH 7.0 phosphate buffer.