Self-Assembly of CdSe Nanoplatelets into Giant Micrometer-Scale Needles Emitting Polarized Light

被引：150

作者：

Abecassis, Benjamin ^{[1
]}

Tessier, Mickael D. ^{[2
]}

Davidson, Patrick ^{[1
]}

Dubertret, Benoit ^{[2
]}

机构：

[1] Univ Paris 11, CNRS, UMR 8502, Lab Phys Solides, F-91405 Orsay, France

[2] Univ Paris 06, CNRS, ESPCI, Lab Phys & Etud Mat, F-75005 Paris, France

来源：

NANO LETTERS | 2014年 / 14卷 / 02期

关键词：

CdSe; nanoplatelets; nanosheets; self-assembly; SAXS; TEM; NANOPARTICLES; EMISSION; NANORODS; SHAPE; NANOCRYSTALS; ANISOTROPY; DODECANE; LIGANDS; FORCES;

D O I：

10.1021/nl4039746

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the self-assembly of colloidal CdSe nanoplatelets into micrometers long anisotropic needle-like superparticles (SPs), which are formed in solution upon addition of an antisolvent to a stable colloidal dispersion. Optical fluorescence microscopy, transmission electron microscopy, and small-angle X-ray scattering provide detailed structural characterization and show that each particle is composed of 106 nanoplatelets organized in highly aligned columns. Within the SPs, the nanoplatelets are stacked on each other to maximize the contact surface between the ligands. When deposited on a substrate, the planes of the platelets are oriented perpendicularly to its surface and the SPs exhibit polarized emission properties.

引用

页码：710 / 715

页数：6

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