Flexible photoelectrochemical sensor for highly sensitive chloramphenicol detection based on M-TiO-CdTe QDs/CdS QDs composite.

Chloramphenicol (CAP) is widely used in the food industry and animal husbandry due to its effective antibiotic effect active against gram-positive and gram-negative microorganisms. However, research shows that it can cause serious adverse reactions and side effects in the human body. In order to effectively monitor the residues of CAP, a novel and simple photoelectrochemical (PEC) sensor for sensitive detection of CAP is fabricated based on M-TiO-CdTe QDs/CdS QDs composite.

A novel signal amplified electrochemiluminescence biosensor based on MIL-53(Al)@CdS QDs and SiO@AuNPs for trichlorfon detection.

An ultrasensitive electrochemiluminescence (ECL) biosensor was developed based on MIL-53(Al)@CdS QDs and SiO@AuNPs for trichlorfon detection. Metal-organic frameworks (MOFs) were used as a loading platform that provided a large surface area to load targets and modified materials onto the electrode. At the same time, SiO@AuNPs loaded plenty of AuNPs which effectively increased the ECL resonance energy transfer between the CdS QDs, so that the ECL signal was strongly quenched and resulted in an amplified response.

Electrochemiluminescence aptasensor for multiple determination of Hg and Pb ions by using the MIL-53(Al)@CdTe-PEI modified electrode.

An aptasensor based on MIL-53(Al)@CdTe was designed for multiple determination of Hg and Pb by electrochemiluminescence (ECL). Upon the recognition of Hg, aptamer 2-AuNPs form hairpin structures and are removed from the electrode. While in the presence of Pb, aptamer 1-PtNPs capture the target ions and form G-quadruplexes, and then bring PtNPs close enough to CdTe QDs to produce ECL resonance energy transfer.