Low dimensional heterostructures have potential applications in information, sensing, and energy-related technologies. In order to obtain high-quality low dimensional heterostructures, an essential method is tuning chemical composition in a single nanostructure to obtain two or multiple components with well-matched electronic band structures. Here, we present a tutorial review of a unique chemical vapor growth approach with in situ switchable solid chemical sources that can build composition-modulated chalcogenide heterostructures in one-dimensional nanowires, quasi one-dimensional nanobelts and two-dimensional atomic layered nanosheets in a controlled manner. This approach has generated a large variety of heterostructures that not only exhibit gradient distribution in chemical composition, but also show sharp interfaces. Diverse integrated photonic and optoelectronic devices are enabled by the composition-modulated heterostructures based on chalcogenides or other material systems.

中文翻译：

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一维和二维硫族化物半导体纳米结构中的成分调制

低维异质结构在信息，传感和能源相关技术中具有潜在的应用。为了获得高质量的低维异质结构，一种必不可少的方法是调整单个纳米结构中的化学组成，以获得具有良好匹配的电子带结构的两个或多个组件。在这里，我们介绍了一种独特的原位化学气相生长方法的教程可转换的固体化学源，可以以受控方式在一维纳米线，准一维纳米带和二维原子层状纳米片中构建成分调节的硫族化物异质结构。这种方法产生了各种各样的异质结构，这些异质结构不仅在化学成分上表现出梯度分布，而且还表现出尖锐的界面。通过基于硫族化物或其他材料系统的成分调制异质结构，可以实现多种集成的光子和光电器件。