Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing
HAO, Junjie
Department of Electrical and Electronic Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Department of Electrical and Electronic Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
HAO, Junjie
Department of Electrical and Electronic Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Department of Electrical and Electronic Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
MIAO, Jun
The Institute of Applied Physics and Materials Engineering
Department of Materials Science and Engineering
The Institute of Applied Physics and Materials Engineering
Department of Materials Science and Engineering
LI, Yiwen
Department of Electrical and Electronic Engineering
The Institute of Applied Physics and Materials Engineering
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Department of Electrical and Electronic Engineering
The Institute of Applied Physics and Materials Engineering
Langue
en
Article de revue
Ce document a été publié dans
Nanoscale. 2019, vol. 11, n° 19, p. 9327-9334
Royal Society of Chemistry
Résumé en anglais
As opposed to traditional photoluminescence and ultra-violet based optical sensing, we present here a sensing system based on resolved optically active polarization with promising applications. It is based on the ultrathin ...Lire la suite >
As opposed to traditional photoluminescence and ultra-violet based optical sensing, we present here a sensing system based on resolved optically active polarization with promising applications. It is based on the ultrathin CdSe nanoplatelets (NPLs) when modified with either L or D-cysteine molecules (L/D-cys) as bio-to-nano ligands. The chiral ligand transfers its chiroptical activity to the achiral nanoplatelets with an anisotropy factor of ∼10−4, which unlocks the chiral excitonic transitions and allows lead ion detection with a limit of detection (LOD) as low as 4.9 nM. Simulations and modelling based on time-dependent density functional theory (TD-DFT) reveal the chiral mechanism of L/D-cys capped CdSe NPLs. The presented CD-based sensing system illustrates an alternative possibility of using chiral CdSe NPLs as competitive chiral sensors for heavy metal ion detection.< Réduire
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