Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing

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

doi:10.1039/c8nr10506e

Cited by 46 publications

(43 citation statements)

References 68 publications

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“…The observed absorption peaks indicate that the NPLs thickness herein is around 4 MLs based on previous studies. [ 21,31,32,41 ] These obtained 4 MLs CdSe NPLs core with lateral dimensions ≈ 5.3 nm × 21.9 nm and 1.4 nm thickness (Figure S2, Supporting Information), have a ZB structure, and their two largest facets end with a cadmium‐rich plane are passivated by carboxylate ligands. [ 41,42 ]…”

Section: Resultsmentioning

confidence: 99%

“…[ 31 ] However, since the CdS‐crown layer is grown only in the lateral direction, they still suffer from serious stability issues. The PL‐QY can be greatly quenched in the core/crown NPLs after a common chiral ligands exchange process, [ 41 ] because of the lack of proper passivation on their larger lateral surfaces. Also, with the coating of a flat CdS shell, the optical properties of the CdSe/CdS core/shell NPLs have been shown to be enhanced with respect to the core‐only NPLs.…”

Section: Introductionmentioning

confidence: 99%

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Optically Active CdSe/CdS Nanoplatelets Exhibiting Both Circular Dichroism and Circularly Polarized Luminescence

Hao

Zhao

Wang

et al. 2021

Advanced Optical Materials

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Ligand‐induced chirality in colloidal semiconductor nanocrystals attracts attention because of their tunable chiroptical properties. Here, the induced chirality and circularly polarized luminescence (CPL) are investigated as a function of the CdS shell growth in a range of 2D CdSe/CdS nanoplatelets (NPLs) capped with chiral ligands. Five samples of CdSe/CdS NPLs are synthesized by a one‐pot approach to vary the island‐like shell on a four‐monolayer (4 ML) CdSe NPLs core, which effectively reduces the interfacial strain energy. The successful preparation of L‐/D‐Cysteine‐capped CdSe/CdS NPLs with both tunable circular dichroism (CD) and CPL behaviors and a maximum anisotropic luminance factor (glum) of 5.29 × 10−4 is described. The induced chiroptical response shows a direct relationship with the formation of island‐like shell in the first and second stages and shows a clear signal evolution. In the third stage with a full coating shell, the CD and CPL signals are inversely proportional to the CdS shell thickness. The island‐like shell gives birth to the CPL signal, while the formation of full coating shell decreases the induced chirality. Such chiral and emissive NPLs provide an ideal platform for the rational design of semiconductor nanocrystals with chiroptical properties in areas of biomedicine, polarizers, and new generation of display devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optically Active CdSe/CdS Nanoplatelets Exhibiting Both Circular Dichroism and Circularly Polarized Luminescence

Hao

Zhao

Wang

et al. 2021

Advanced Optical Materials

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“…On the contrary, the emerging chiral nanostructures, including L-/D-Cys-CdS QDs, 77 L-Cys-Au NRs, Cys-MoO 2 NPs, 59 satellite structure (Au NRs@Pt and UCNP), 85 the Au satellite nanostructures (Au@AgAu NRs-AuNPs), 42 and different scale of Ag-Ag NP dimers 58 and Au-Au NP dimers, 40 possess interesting optical properties and showed the advantages of specificity, sensitivity, cheap, high efficiency, and biocompatibility and thus have great potential as chiral sensors. Many metal ions, such as zinc ions, 42,85 copper ions, 85 magnesium ions, 85 lead ions, 77 mercury ions, 38,59 and silver ions, 60 could be detected by chiral nanosensors fastly and efficiently. For example, cysteine-capped four layer CdSe NPLs were fabricated via ligand-exchange reaction between oleate anions and chiral cysteine (Figure 5A).…”

Section: Chiral Sensors For Metal Ionsmentioning

confidence: 99%

Biological applications of chiral inorganic nanomaterials

et al. 2022

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Chirality is common in nature and plays the essential role in maintaining physiological process. Chiral inorganic nanomaterials with intense optical activity have attracted more attention due to amazing properties in recent years. Over the past decades, many efforts have been paid to the preparation and chirality origin of chiral nanomaterials; furthermore, emerging biological applications have been investigated widely. This review mainly summarizes recent advances in chiral nanomaterials. The top‐down and bottom‐up preparation methods and chirality origin of chiral nanomaterials are introduced; besides, the biological applications, such as sensing, therapy, and catalysis, will be introduced comprehensively. Finally, we also provide a perspective on the biomedical applications of chiral nanomaterials.

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“…The band gap was found to be decreased for the Hg 2+ ion complex rather than the unbound probe which confirms the host-guest interaction. Chiral CdSe nanoplatelets -L/D-cysteine as sensitive optical probe for recognition of Pb 2+ ions was reported by Wang et al [50] The TD-DFT calculations at B3LYP level using LANL2DZ basis set was carried out. The results of frontier molecule orbital calculations of the HOMO and LUMO orbitals showed overlapping between the cysteine capped CdSe nanocluster and the organic core.…”

Section: Heavy Metal Sensormentioning

confidence: 99%

Applications of Density Functional Theory on Heavy Metal Sensor and Hydrogen Evolution Reaction (HER)

Srinivasadesikan¹,

Varadaraju²,

Raghunath³

et al. 2022

Density Functional Theory - Recent Advances, New Perspectives and Applications

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A great effort has been devoted to develop the numerical methods to solve Schrödinger equation for atoms and molecules which help to reveal the physico-chemical process and properties of various known/unknown materials. Designing the efficient probe to sense the heavy metals is a crucial process in chemistry. And, during this energy crisis, to find the effective conversion materials for water splitting is an important approach. The density functional theory (DFT) is a powerful tool to identify such materials and made great achievements in the field of heavy metal chemosensor and photocatalysis. Particularly, DFT helps to design the chemosensor for the effective sensor applications. The universe is moving towards the exhaustion of fossil fuels in a decade and so on, DFT plays a vital role to find the green energetic alternative to fossil fuel which is the Hydrogen energy. This book chapter will focus on the application of DFT deliberately on the heavy metal sensors and hydrogen evolution reaction.

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Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing

Abstract: Achiral CdSe NPLs could show chirality through ligand exchange with chiral cysteine molecules. Chiral CdSe NPLs were successfully applied as a chiral probe to detect lead ions with high sensitivity and selectivity.

Cited by 46 publications

References 68 publications

Optically Active CdSe/CdS Nanoplatelets Exhibiting Both Circular Dichroism and Circularly Polarized Luminescence

Optically Active CdSe/CdS Nanoplatelets Exhibiting Both Circular Dichroism and Circularly Polarized Luminescence

Biological applications of chiral inorganic nanomaterials

Applications of Density Functional Theory on Heavy Metal Sensor and Hydrogen Evolution Reaction (HER)

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