Anti-PPY polyclonal antibody

A composite of MWCNTs@S-PPy with excellent electrical conductivity and good restriction on polysulfide has been prepared for lithium-sulfur batteries. In this composite, sulfur particles confined to polypyrrole (PPy) are uniformly distributed on the surface of carbon nanotubes. The MWCNTs@S-PPy composite with a sulfur content of 48.8 wt% delivers a high initial discharge capacity of 1304.9 mAh g(-1)at 0.2 C and remains a stable capacity of 986.3 mAh g(-1)after 300 cycles. The significant improvement in the electrochemical performance can be attributed to the core-shell structure supported by the multiwalled carbon nanotubes (MWCNTs) and S-PPy composite, which own excellent electronic conductivity and alleviate the "shuttle effect" of lithium polysulfide. These results suggest that the MWCNTs@S-PPy composite is a promising cathode material for high-performance lithium-sulfur batteries.

In this work, a novel and efficient aptasensor assisted by a computerized monitoring system namely SACMES was introduced for real time determination of the prostate specific antigen (PSA). The platform of the aptasensor was a glassy carbon electrode (GCE) modified with graphene quantum dots-chitosan-nafion-ionic liquid/multiwalled carbon nanotubes-graphene-ionic liquid/polypyrrole-MoS2-ionic liquid-AuPt nanoparticles/aptamer (APT/Ppy-MoS2-IL-AuPt NPs/MWCNTs-Gr-IL/GQDs-CS-NAF-IL/GCE). After characterization of the steps of the modification process used to fabricate the aptasensor by electrochemical and microscopic techniques, its square wave voltammetric (SWV) responses at different frequencies as a large-volume of electrochemical data were calibrated with the help of SACMES as an efficient software which helped us to develop an interesting method for real time determination of the PSA. Our records confirmed that the aptasensor response was linearly correlated with PSA concentration in the range of 0.5-350 pg mL(-1) with a detection limit of 0.14 pg mL(-1). Our results also confirmed that aptasensor was stable, repeatable, reproducible, selective and sensitive for determination of the PSA and its performance in the analysis of real samples was acceptable.