Highly-sensitive enzyme electrode for NADH.

A biomimetic enzyme modified electrode for H2O2 highly sensitive detection.

An efficient catalyst based on artificial bionic peroxidase was synthesized for electrocatalysis. A poly(ethyleneimine)/Au nanoparticle composite (PEI-AuNP) was prepared and it was then linked to hemin via a coupling reaction between carboxyl groups in hemin and amino groups in PEI without the activation of a carboxyl group by carbodiimide. Fourier transform infrared (FTIR) spectroscopy verifie...

A Highly Sensitive Enzyme-Amplified Immunosensor Based on a Nanoporous Niobium Oxide (Nb2O5) Electrode

We report on the development of an enzyme-amplified sandwich-type immunosensor based on a thin gold film sputtered on an anodic nanoporous niobium oxide (Au@Nb(2)O(5)) electrode. The electrocatalytic activity of enzymatically amplified electroactive species and a stable electrode consisting of Au@Nb(2)O(5) were used to obtain a powerful signal amplification of the electrochemical immunobiosenso...

A Highly Sensitive Glucose Electrode Using Glucose Oxidase Collagen Film

Highly Sensitive Capacitive Gas Sensing at Ionic Liquid-Electrode Interfaces.

We have developed an ultrasensitive gas-detection method based on the measurement of a differential capacitance of electrified ionic liquid (IL) electrode interfaces in the presence and absence of adsorbed gas molecules. The observed change of differential capacitance has a local maximum at a certain potential that is unique for each type of gas, and its amplitude is related to the concentratio...

Highly sensitive protein detection using enzyme-labeled gold nanoparticle probes.

A highly sensitive protein detection method based on a novel enzyme-labeled gold nanoparticle (AuNP) probe has been developed. In this method, we firstly prepared the enzyme-labeled AuNP probe by coating AuNP with antibody, single-stranded DNA (ssDNA), and horseradish peroxidase (HRP). Magnetic microparticle (MMP) functionalized with another antibody was used as capture probe. Then, target prot...