Optically Active CdSe-Dot/CdS-Rod Nanocrystals with Induced Chirality and Circularly Polarized Luminescence

Cheng, Jiaji1; Hao, Junjie2; Liu, Haochen2; Li, Jiagen3; Li, Junzi1; Zhu, Xi2,3; Lin, Xiaodong1; Wang, Kai2; He, Tingchao1

2018-06

10.1021/acsnano.8b00112

ACS Nano   影响因子和分区

1936-0851

1936-086X

Ligand-induced chirality in semiconductor nanocrystals (NCs) has attracted attention because of the tunable optical properties of the NCs. Induced circular dichroism (CD) has been observed in CdX (X = S, Se, Te) NCs and their hybrids, but circularly polarized luminescence (CPL) in these fluorescent nanomaterials has been seldom reported. Herein, we describe the successful preparation of L- and D-cysteine-capped CdSe-dot/CdS-rods (DRs) with tunable CD and CPL behaviors and a maximum anisotropic factor (g(lum)) of 4.66 X 10(-4). The observed CD and CPL activities are sensitive to the relative absorption ratio of the CdS shell to the CdSe core, suggesting that the anisotropic g-factors in both CD and CPL increase to some extent for a smaller shell-to-core absorption ratio. In addition, the molar ratio of chiral cysteine to the DRs is investigated. Instead of enhancing the chiral interactions between the chiral molecules and DRs, an excess of cysteine molecules in aqueous solution inhibits both the CD and CPL activities. Such chiral and emissive NCs provide an ideal platform for the rational design of semiconductor nanomaterials with chiroptical properties.

CdSe-dot/CdS-rod ligand-induced chirality circular dichorism circularly polarized luminescence excitonic interactions orbital coupling theory

SCI ; EI

英语

NI期刊

通讯

Tianjin New Materials Science and Technology Major Project[16ZXCLGX00040]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000436910200029

AMER CHEMICAL SOC

20182205261476

Amino acids ; Anisotropy ; Cadmium sulfide ; Chirality ; Circular polarization ; Dichroism ; II-VI semiconductors ; Luminescence ; Molecules ; Nanocrystals ; Nanostructured materials ; Oil field development ; Solutions ; Stereochemistry ; Tellurium compounds

Electromagnetic Waves:711 ; Light/Optics:741.1 ; Nanotechnology:761 ; Chemistry:801 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3

Web of Science

1.Shenzhen Univ, Coll Phys & Energy, Shenzhen 518060, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Chinese Univ Hong Kong, Sch Sci & Engn, Shenzhen 518172, Peoples R China

Cheng, Jiaji,Hao, Junjie,Liu, Haochen,et al. Optically Active CdSe-Dot/CdS-Rod Nanocrystals with Induced Chirality and Circularly Polarized Luminescence[J]. ACS Nano,2018,12(6):5341-5350.

Cheng, Jiaji.,Hao, Junjie.,Liu, Haochen.,Li, Jiagen.,Li, Junzi.,...&He, Tingchao.(2018).Optically Active CdSe-Dot/CdS-Rod Nanocrystals with Induced Chirality and Circularly Polarized Luminescence.ACS Nano,12(6),5341-5350.

Cheng, Jiaji,et al."Optically Active CdSe-Dot/CdS-Rod Nanocrystals with Induced Chirality and Circularly Polarized Luminescence".ACS Nano 12.6(2018):5341-5350.