Single‐Crystalline Colloidal Quasi‐2D Tin Telluride,Advanced Materials Interfaces

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Single‐Crystalline Colloidal Quasi‐2D Tin Telluride
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-05-17 , DOI: 10.1002/admi.202000410
Fu Li ₁ , Jiecai Fu ₂ , Abderrezak Torche ₁ , Sascha Kull ₁ , Andreas Kornowski ₁ , Rostyslav Lesyuk _{1,

3,

4,

5} , Gabriel Bester ₁ , Christian Klinke _{1,

3,

6}

Affiliation

Tin telluride is a narrow‐gap semiconductor with promising properties for infrared (IR) optical applications and topological insulators. A convenient colloidal synthesis of quasi‐2D SnTe nanocrystals through the hot‐injection method in a nonpolar solvent is reported. By introducing the halide alkane 1‐bromotetradecane as well as oleic acid and trioctylphosphine, the thickness of 2D SnTe nanostripes can be tuned down to 30 nm, while the lateral dimensional can reach 6 µm. The obtained SnTe nanostripes are single crystalline with a rock‐salt crystal structure. The absorption spectra demonstrate pronounced absorption features in the IR range revealing the effect of quantum confinement in such structures.

中文翻译：

单晶体胶体准二维碲化锡

碲化锡是一种窄间隙半导体，在红外（IR）光学应用和拓扑绝缘体方面具有广阔的前景。据报道，在非极性溶剂中通过热注射方法可以方便地胶体合成准2D SnTe纳米晶体。通过引入卤代烷烃1-溴十四烷以及油酸和三辛基膦，二维SnTe纳米条的厚度可调节至30 nm，而横向尺寸可达到6 µm。获得的SnTe纳米带是具有盐岩晶体结构的单晶。吸收光谱在红外范围内显示出明显的吸收特征，从而揭示了这种结构中量子限制的作用。

更新日期：2020-05-17

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