Growth of AgI semiconductors on tailored 3D porous TiC MXene/graphene oxide aerogel to develop sensitive and selective "signal-on" photoelectrochemical sensor for HS determination.

Long term exposure to hydrogen sulfide (HS) even in low concentration poses a serious threat to human health and the ecosystem, pointing to the significance for its effective supervision. In this study, we report a sensitive and selective "signal-on" photoelectrochemical (PEC) sensor for the determination of toxic HS in aqueous solution by in situ growth of AgI semiconductors on tailored three-dimensional (3D) porous TiC MXene/graphene oxide aerogel (MGA). Our research demonstrated that the resultant MGA with the starting feeding mass ratio of MXene and graphene oxide (GO) of 1:8 (MGA) possessed the most excellent PEC performance after the growth of AgI semiconductors than their monomers (TiC MXene and GO) and the MGAs with other starting feeding mass ratio.

An upgraded 2D nanosheet-based FRET biosensor: insights into avoiding background and eliminating effects of background fluctuations.

We demonstrated a new class of 2D nanosheet-based FRET biosensor utilizing vertically oriented MoS nanosheets on a magnetic nanocarrier. Compared with the non-separated biosensor under identical conditions, this upgraded one can avoid the background signal of the system and eliminate the effects of background fluctuations, which produces more excellent detection methods

Controlling the ligands of CdZnTe quantum dots to design a super simple ratiometric fluorescence nanosensor for silver ion detection.

A super simple ratiometric fluorescence nanosensor has been fabricated by controlling the ligands of CdZnTe quantum dots (QDs), allowing the sensitive and visual detection of silver ions (Ag). The green-emitting L-cysteine-protected CdZnTe QDs (Lcys-CdZnTe QDs) had a specific response to Ag and were used as the reporting probe, while the red-emitting -acetyl-L-cysteine-protected CdZnTe QDs (NAC-CdZnTe QDs) showed no obvious response to all tested metal ions and were selected as the reference probe. Simply mixing them without any encapsulated synthesis ultimately produced a time-saving, low-cost detection method, allowing the sensitive and visual detection of Ag in samples.