Polymer-Assisted Synthesis of Colloidal Germanium Telluride Nano-Octahedra, Nanospheres, and Nanosheets

被引：26

作者：

Buck, Matthew R.

Biacchi, Adam J.

Popczun, Eric J.

Schaak, Raymond E. ^{[1
]}

机构：

[1] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

CHEMISTRY OF MATERIALS | 2013年 / 25卷 / 10期

基金：

美国国家科学基金会;

关键词：

GeTe; nanoparticles; nanosheets; nanoparticle synthesis; phase change materials; SHAPE-CONTROLLED SYNTHESIS; PHASE-CHANGE MATERIALS; NANOCRYSTALS; NANOWIRES; SIZE; GROWTH; NANOPARTICLES; TRANSITION; REACTIVITY; GE;

D O I：

10.1021/cm4009656

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Germanium telluride (GeTe) nanostructures are a demonstrated platform for studying the effects of scaling on reversible, amorphous-to-crystalline phase transitions that are important for data storage and computing applications, and for understanding ferroelectric behavior at the nanometer scale. Despite the interest in GeTe, and the apparent advantages of solution-phase processing, there is a dearth of information related to the synthesis of high-quality, morphology-controlled, colloidal GeTe. This paper describes the preparation of colloidal GeTe nanostructures in the presence of surface-stabilizing polymers, which mediate particle particle interactions and prevent aggregation of GeTe crystallites more effectively than conventional molecular stabilizers. As a result, several novel GeTe nanostructures are formed, including faceted octahedral nanoparticles, amorphous GexTe1-x alloy nanospheres and single-crystal two-dimensional (2D) GeTe nanosheets. The colloidal stability conferred by the polymer may provide the key experimental degree of freedom necessary to achieve higher-order morphology control for GeTe and related materials.

引用

页码：2163 / 2171

页数：9

共 78 条

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