Candy-like heterojunction nanocomposite of WO/FeO-based semiconductor gas sensor for the detection of triethylamine.

A highly efficient gas sensor for the detection of triethylamine based on candy-like WO/FeO nanocomposite was prepared. The control of morphology and sensing performance of n-n heterojunction WO/FeO nanocomposites were successfully achieved by the modulation of Fe element content. When the ratio of Fe to W is 0.

ReS@Au NPs as signal labels quenching steady photocurrent generated by NiCoO/CdInS/InS heterojunction for sensitive detection of CYFRA 21-1.

In order to achieve rapid and sensitive detection of CYFRA 21-1, a signal-off photoelectrochemical (PEC) immunosensor was devised with NiCoO/CdInS/InS heterojunction photoactive materials as sensing platform and ReS@Au NPs as the secondary antibody labels amplifying signal based on the energy band-matching cascade structure and double suppression effect. NiCoO possessed a faster charge transfer rate due to the abundance of redox electron pairs (Co/Co and Ni/Ni). To further improve the PEC properties of NiCoO under visible light, CdInS with matching bandgap energy was selected to form heterojunction with NiCoO and sensitized with InS.

Highly sensitive photoelectrochemical neuron specific enolase analysis based on cerium and silver Co-Doped SbWO.

A signal-enhanced photoelectrochemical immunoassay technique for detecting neuron specific enolase (NSE) was proposed. As a photoactive matrix, (Ce,Ag):SbWO was firstly investigated via doping Ce and Ag into SbWO. It could be found that the presence of Ce and Ag not only had enormous variation on the morphology of SbWO, but also showed excellent PEC behavior.