Chirality Induction to CdSe Nanocrystals Self-Organized on Silica Nanohelices: Tuning Chiroptical Properties

被引：21

作者：

Liu, Peizhao ^{[1
,2
]}

Battie, Yann ^{[3
]}

Decossas, Marion ^{[1
]}

Tan, Sisareuth ^{[1
]}

Pouget, Emilie ^{[1
]}

Okazaki, Yutaka ^{[2
]}

Sagawa, Takashi ^{[2
]}

Oda, Reiko ^{[1
]}

机构：

[1] Univ Bordeaux, CBMN, Bordeaux INP, CNRS,UMR 5248, F-33600 Pessac, France

[2] Kyoto Univ, Grad Sch Energy Sci, Kyoto 6068501, Japan

[3] Univ Lorraine, Lab Chim & Phys, Approche Multiechelles Milieux Complexes LCP A2MC, F-57078 Metz, France

来源：

ACS NANO | 2021年 / 15卷 / 10期

关键词：

optically active nanostructures; chiral silica ribbons; CdSe quantum dots; CdSe/CdS quantum rods; chiral organization; OPTICAL-ACTIVITY; SUPRAMOLECULAR CHIRALITY; CIRCULAR-DICHROISM; SEEDED GROWTH; QUANTUM DOTS; SPIN; CDTE;

D O I：

10.1021/acsnano.1c05819

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

CdSe nanocrystals (NCs) were grafted on chiral silica nanoribbons, and the mechanism of resulting chirality induction was investigated. Because of their chiral organization, these NCs show optically active properties that depend strongly on their grafting densities and sizes of the NCs. The effect of the morphology of the chiral silica templates between helical (cylindrical curvature) vs twisted (saddle like curvature) ribbons was investigated. The g-factor of NCs-silica helical ribbons is larger than that of the NCs-silica twisted ribbons. Finally, rod-like NCs (QR) with different lengths were grafted on the twisted silica ribbons. Interestingly, their grafting direction with respect to the helix surface changed from side-grafting for short QR to tip-grafting for long rods and the corresponding CD spectra switched signs.

引用

页码：16411 / 16421

页数：11

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