Excitonic Circular Dichroism of Chiral Quantum Rods

Gao, Xiaoqing1; Zhang, Xiuwen2; Deng, Ke1; Han, Bing1; Zhao, Luyang3; Wu, Minghui4; Shi, Lin1; Lv, Jiawei1; Tang, Zhiyong1

2017-06-28

10.1021/jacs.7b04224

Journal of the American Chemical Society   影响因子和分区

0002-7863

As an emerging type of optically active materials, chiral molecules-stabilized semiconductor quantum dots (QDs) have achieved extensive attention. Unfortunately, understanding of the optical characteristics of chiral QDs observed by circular dichroism (CD) spectroscopy remains a great challenge due to their rather weak signals. Herein; we successfully achieve much enhanced, CD responses from or D-cystein stabilized wurtzite CdSe quantum rods (QRs) thanks to their unique optical anisotropy. Furthermore, the optical, activity of CdSe QRs is explored to be improved and subsequently become stable with the geometrical aspect ratio (AR) increasing, and Such change matches well with alternation of the polarization factor of CdSe QRs. A non-degenerate Coupled-oscillator (NDCO) model is established to elucidate the optical activity of Chiral QRs, and the positive and negative natures of the CD peaks appearing at, the first exciton hand are clearly assigned to different transition polarization along 4p(z,Se) -> 5(sCd) and 4p((x,y),Se) -> 5s(Cd), respectively. This work opens the door toward comphrension and design of optically active semiconductor nanomaterials.

SCI ; EI

英语

NI期刊

其他

National Key Research and Development Program of China[2016YFB0700700]

Chemistry

Chemistry, Multidisciplinary

WOS:000404809600052

AMER CHEMICAL SOC

20172703887342

Amino acids ; Aspect ratio ; Cadmium compounds ; Circular dichroism spectroscopy ; Dichroism ; Excitons ; II-VI semiconductors ; Optical materials ; Polarization ; Selenium compounds ; Stereochemistry ; Zinc sulfide

Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Chemistry:801 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2

Web of Science

1.Chinese Acad Sci, Ctr Excellence Nanosci, Natl Ctr Nanosci & Technol, Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China
2.Shenzhen Univ, Coll Elect Sci & Technol, Shenzhen Key Lab Micronano Photon Informat Techol, Shenzhen 518060, Guangdong, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
4.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China

Gao, Xiaoqing,Zhang, Xiuwen,Deng, Ke,et al. Excitonic Circular Dichroism of Chiral Quantum Rods[J]. Journal of the American Chemical Society,2017,139(25):8734-8739.

Gao, Xiaoqing.,Zhang, Xiuwen.,Deng, Ke.,Han, Bing.,Zhao, Luyang.,...&Tang, Zhiyong.(2017).Excitonic Circular Dichroism of Chiral Quantum Rods.Journal of the American Chemical Society,139(25),8734-8739.

Gao, Xiaoqing,et al."Excitonic Circular Dichroism of Chiral Quantum Rods".Journal of the American Chemical Society 139.25(2017):8734-8739.