Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing
Wang,Xiongbin1; Hao,Junjie1,2; Cheng,Jiaji3,4; Li,Junzi3; Miao,Jun5,6; Li,Ruxue1; Li,Yiwen1,5; Li,Jiagen7; Liu,Yuhui1; Zhu,Xi7; Liu,Yanjun1; Sun,Xiao Wei1; Tang,Zikang5; Delville,Marie Hélène2; He,Tingchao3; Chen,Rui1
Source PublicationNanoscale
AbstractAs 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, 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.
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Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorChen,Rui
Affiliation1.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen Guangdong,518055,China
2.University of Bordeaux,CNRS,ICMCB,UMR,Pessac,5026 F-33608,France
3.College of Physics and Energy,Shenzhen University,Shenzhen Guangdong,518060,China
4.School of Materials Science and Engineering,Hubei University,Wuhan,430062,China
5.Institute of Applied Physics and Materials Engineering,University of Macau,Taipa,Avenida da Universidade,Macao
6.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen Guangdong,518055,China
7.School of Science and Engineering,Chinese University of Hong Kong,518172,China
Recommended Citation
GB/T 7714
Wang,Xiongbin,Hao,Junjie,Cheng,Jiaji,et al. Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing[J]. Nanoscale,2019,11(19):9327-9334.
APA Wang,Xiongbin,Hao,Junjie,Cheng,Jiaji,Li,Junzi,Miao,Jun,Li,Ruxue,Li,Yiwen,Li,Jiagen,Liu,Yuhui,Zhu,Xi,Liu,Yanjun,Sun,Xiao Wei,Tang,Zikang,Delville,Marie Hélène,He,Tingchao,&Chen,Rui.(2019).Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing.Nanoscale,11(19),9327-9334.
MLA Wang,Xiongbin,et al."Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing".Nanoscale 11.19(2019):9327-9334.
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