Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets

Gao, Xiaoqing; Zhang, Xiuwen; Zhao, Lei; Huang, Pu; Han, Bing; Lv, Jiawei; Qiu, Xueying; Wei, Su‐Huai; Tang, Zhiyong

doi:10.1021/acs.nanolett.8b01001

Cited by 79 publications

(125 citation statements)

References 58 publications

Supporting

Mentioning

120

Contrasting

Order By: Relevance

“…[235] Gao et al also reported crystal structure-dependent CD of l-and d-cysteine stabilized CdSe nanoplatelets. [241] The clearly distinguishable optical properties of wurtzite and zincblend CdSe showed that conformation of chiral ligands strongly affect the surface chirality.…”

Section: Chiral Geometry Of Inorganic Crystalsmentioning

confidence: 99%

Chiral Surface and Geometry of Metal Nanocrystals

et al. 2019

View full text Add to dashboard Cite

and their microscopic assembling and folding gradually give rise to chirality and left-right asymmetry from supramolecules to organelles, cells, and macroscopic organisms. Although the origin of homochirality is still unexplained and opens to arguments, investigating the chirality of matter and its origination is a central part of understanding asymmetric physical and chemical phenomena. The importance of chirality in chemistry lies in the asymmetric biochemical reactions with different physiological effect, which has paramount importance in biochemistry and pharmaceutical industry. [3,14,15] A mirror image of chiral objects can be determined into one of the left-handed or right-handed forms of geometry, called enantiomer or enantiomorph. Both enantiomers of a chiral object consist of identical chemical compositions but indeed are significantly different in their light-matter interaction, catalysis, and biological functions. The enantioselective signaling and enzymatic reaction are attributed to the homochirality of the living organism and its biological receptors, which are only composed of l-form amino acids and d-form sugars in nature. [7,14,15] Thalidomide is often referred to as a representative but also the most tragic example. The R-form of this drug is harmless to the body and was released as a painkiller for pregnant women, but its enantiomer causes severe malformation in the limbs of infants. [15,16] Since then, it has been a requirement for drugs to be characterized as a single enantiomer to be approved. 3D chirality is a unique characteristic of life, and the stereochemical aspect of molecular materials has come to fore of modern chemistry and biology. The optical property of chiral compounds, the so-called chiroptical effect, is highly effective for observing chirality in a nondestructive manner. [17] Chiroptical effects can be used for determination of the absolute configuration and enantiomeric excess of chiral molecules and as an optical probe for estimating the 3D structure of biomacromolecules such as proteins and DNA. [18] However, in most chiral organic molecules and biomolecules, chiroptical effects are typically very weak due to the much smaller size of molecules than the wavelength of exciting light. Integration of inorganic nanomaterials is one promising method for increasing the chiroptical signal of molecules; it focuses the light into nanoscale area to maximize the lightmatter interaction. [19-22] For example, a complex spatial profile Chirality is a basic property of nature and has great importance in photonics, biochemistry, medicine, and catalysis. This importance has led to the emergence of the chiral inorganic nanostructure field in the last two decades, providing opportunities to control the chirality of light and biochemical reactions. While the facile production of 3D nanostructures has remained a major challenge, recent advances in nanocrystal synthesis have provided a new pathway for efficient control of chirality at the nanoscale by transferring molecular chirality to the geo...

show abstract

Section: Chiral Geometry Of Inorganic Crystalsmentioning

confidence: 99%

Chiral Surface and Geometry of Metal Nanocrystals

et al. 2019

View full text Add to dashboard Cite

show abstract

“…As a result, the intriguing circular dichroism (CD) peaks occur in the vicinity of the absorption bands of the colloidal NPs. 21 Recently, chiral ligand capped semiconductor nanodots, [22][23][24][25] nanorods 10,26 and NPLs [27][28][29][30] as well as their core-shell nanostructures have been extensively studied. Like in the case of metallic plasmonic NPs such as Au or Ag, the strong coupling between chiral ligand and achiral semiconductor can induce subsequent chirality transfer from molecules to semiconductor core with an anisotropic factor close to 10 -4 .…”

Section: Introductionmentioning

confidence: 99%

Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing

et al. 2019

View full text Add to dashboard Cite

show abstract

“…[29] The more recently developed method for fabrication of chiral QDs through postsynthesis ligand exchange, dramatically increased the ability to study induced chirality in shaped and heterostructured QDs and extended the range of chiral ligands used in the process. [30] These recent studies shed more light on the mechanisms underlying the induction of chirality. By controlling the morphology of QDs, Tang et al showed the enhanced CD signal from wurtzite CdSe nanorods at certain aspect ratios, which was linked to the anisotropic coupling of the molecular dipole and the anisotropic dipole of the nanorods.…”

Section: Semiconductor Nanorods With Induced Circularly Polarized Lightmentioning

confidence: 99%

Multi‐Dimensional Quantum Nanostructures with Polarization Properties for Display Applications

Yang

Zhong

2019

Israel Journal of Chemistry

View full text Add to dashboard Cite

Colloidal semiconductor nanocrystals (NCs), or quantum nanostructures with various dimensions and morphologies, are excellent emerging solution‐processable luminescent materials for display applications. The future of semiconductor NCs in the display market strongly relies on the development of low energy consuming devices. Replacing spherical NCs with multi‐dimensional nanostructures that emit linearly or circularly polarized light with high color purity and brightness, can significantly enhance the performance and efficiency of future display devices. In this review, we highlight some recent advances of colloidal syntheses of multi‐dimensional quantum nanostructures and their implementation as polarized light sources. The most representative examples are quasi‐one‐dimensional (q‐1D) CdSe/CdS dot‐in‐rods with strong linearly polarized emission for liquid crystal display technologies, and two‐dimensional (2D) nanoplatelets with enhanced circular dichroism signals as potential circularly polarized luminescence sources for electroluminescence applications.

show abstract

Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets

Cited by 79 publications

References 58 publications

Chiral Surface and Geometry of Metal Nanocrystals

Chiral Surface and Geometry of Metal Nanocrystals

Chiral CdSe nanoplatelets as an ultrasensitive probe for lead ion sensing

Multi‐Dimensional Quantum Nanostructures with Polarization Properties for Display Applications

Contact Info

Product

Resources

About