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1.
Chem Commun (Camb) ; 58(3): 467-470, 2022 Jan 04.
Artigo em Inglês | MEDLINE | ID: mdl-34908039

RESUMO

We demonstrated a new class of 2D nanosheet-based FRET biosensor utilizing vertically oriented MoS2 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.


Assuntos
Aflatoxina B1/análise , Técnicas Biossensoriais , Dissulfetos/química , Técnicas Eletroquímicas , Compostos Férricos/química , Transferência Ressonante de Energia de Fluorescência , Molibdênio/química , Nanoestruturas/química , Tamanho da Partícula
2.
Analyst ; 146(18): 5747-5755, 2021 Sep 13.
Artigo em Inglês | MEDLINE | ID: mdl-34515708

RESUMO

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 N-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. The proposed nanosensor exhibited a linear range of 0.5-4.0 µM along with a detection limit of 0.17 µM, and has been successfully applied in real tap water and lake water samples. This nanosensor also showed obvious color changes in the detection process and has potential in visual semi-quantitative detection. Our approach may provide a general and feasible strategy for designing ratiometric fluorescence nanosensors, which will attract a wide range of interest in sensing-related fields.


Assuntos
Pontos Quânticos , Cádmio , Corantes Fluorescentes , Íons , Ligantes , Prata , Espectrometria de Fluorescência , Telúrio , Zinco
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