Semiconductor Nanorod Self-Assembly at the Liquid/Air Interface Studied by in Situ GISAXS and ex Situ TEM

被引：67

作者：

Pietra, Francesca ^{[1
]}

Rabouw, Freddy T. ^{[1
]}

Evers, Wiel H. ^{[1
]}

Byelov, Dima V. ^{[2
]}

Petukhov, Andrei V. ^{[2
]}

Donega, Celso de Mello ^{[1
]}

Vanmaekelbergh, Daniel ^{[1
]}

机构：

[1] Debye Inst Nanomat Sci, NL-3584 CC Utrecht, Netherlands

[2] Debye Inst Nanomat Sci, NL-3584 CH Utrecht, Netherlands

来源：

NANO LETTERS | 2012年 / 12卷 / 11期

基金：

欧盟第七框架计划;

关键词：

Nanocrystals; self-assembly; superlattice; grazing-incidence small-angle X-ray scattering; BINARY NANOPARTICLE SUPERLATTICES; COLLOIDAL NANOCRYSTALS; ELECTRIC-FIELD; CRYSTALS; CRYSTALLIZATION;

D O I：

10.1021/nl302360u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study the self-assembly of colloidal CdSe/CdS nanorods (NRs) at the liquid/air interface combining time-resolved. in situ grazing incidence small angle X-ray scattering (GISAXS) and ex situ transmission electron microscopy (TEM). Our study shows that NR superstructure formation occurs at the liquid/air interface. Short NRs self assemble into micrometers long tracks of NRs lying side by side flat on the surface. In contrast, longer NRs align vertically into ordered superstructures.. Systematic variation of the NR length and initial concentration of the NR dispersion allowed us to tune the orientation of the NRs in the final superstructure. With GISAXS, we were able to follow the dynamics of the self-assembly. We propose a model of hierarchical self-organization that provides a basis for the understanding of the length-dependent self-organization of NRs at the liquid/air interface. This opens the way to new, materials based on NR membranes and anisotropic thin films.

引用

页码：5515 / 5523

页数：9

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