单晶胶体准二维碲化锡
Single Crystalline Colloidal Quasi-Two-Dimensional Tin Telluride
AI总结：
本研究开发了热注入法胶体合成准二维单晶SnTe纳米带的方法，通过添加特定试剂调控其尺寸，证实其具有红外吸收特征与量子限域效应，为红外光学等领域应用提供了新材料。
摘要：
碲化锡是一种窄带隙半导体，在红外光学应用和拓扑绝缘体领域具有良好的应用前景。我们报道了一种在非极性溶剂中通过热注入法便捷合成准二维SnTe纳米晶的胶体方法。通过引入卤代烷1-溴十四烷以及油酸和三辛基膦，可将二维SnTe纳米带的厚度调控至低至30 nm，而横向尺寸可达6微米。所得SnTe纳米带为单晶，具有岩盐晶体结构。吸收光谱显示其在红外范围内具有显著的吸收特征，揭示了此类结构中的量子限域效应。
英文摘要：
Tin telluride is a narrow gap semiconductor with promising properties for IR optical applications and topological insulators. We report a convenient colloidal synthesis of quasi-two-dimensional SnTe nanocrystals through the hot-injection method in a non-polar solvent. By introducing the halide alkane 1-bromotetradecane as well as oleic acid and trioctylphosphine, the thickness of two dimensional SnTe nanostripes can be tuned down to 30 nm, while the lateral dimensional can reach 6 microns. 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.
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