Timing matters: the underappreciated role of temperature ramp rate for shape control and reproducibility of quantum dot synthesis

被引：13

作者：

Baumgardner, William J. ^{[1
]}

Quan, Zewei ^{[2
]}

Fang, Jiye ^{[2
]}

Hanrath, Tobias ^{[3
]}

机构：

[1] Cornell Univ, Baker Lab, Ithaca, NY 14853 USA

[2] SUNY Binghamton, Dept Chem, Binghamton, NY USA

[3] Cornell Univ, Sch Chem & Biomol Engn, Ithaca, NY USA

来源：

NANOSCALE | 2012年 / 4卷 / 12期

关键词：

COLLOIDAL SYNTHESIS; PBSE; NANOCRYSTALS; NANOPARTICLES;

D O I：

10.1039/c2nr31054f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Understanding the coupled kinetic and thermodynamics factors governing colloidal nanocrystals nucleation and growth are critical factors in the predictable and reproducible synthesis of advanced nanomaterials. We show that the temporal temperature profile is decisive in tuning the particle shape from pseudo-spherical to monodisperse cubes. The shape of the nanocrystals was characterized by transmission electron microscopy and X-ray diffraction. We introduce a mechanism for the shape controlled synthesis in the context of temperature-dependent nucleation and growth and provide experimental evidence to support it.

引用

收藏

页码：3625 / 3628

页数：4

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