推拉式小车法制备单层硒化钨薄膜

为了提升单层硒化钨（WSe₂）薄膜的制备质量，在传统化学气相沉积（CVD）法制备的基础上进行改进，通过引入推拉式小车来制备单层WSe₂薄膜，从而构造出可以调控沉积区域、精确控制生长时间，并可实现快速降温的生长方式。采用光学显微镜和原子力显微镜来表征制备材料的尺寸、荧光强度、形貌结构等特性，证明了利用推拉式小车法可成功制备出高质量的单层WSe₂薄膜。推拉式小车法可以稳定制备大面积、高质量、单层的WSe₂薄膜，为其在信息、能源、生物等前沿领域的应用提供参考。

Preparation of monolayer tungsten selenide film by trolley based chemical vapor deposition method

In order to improve the preparation quality of monolayer (ML) tungsten selenide (WSe₂). We improve the traditional chemical vapor deposition (CVD) method. ML WSe2 film is prepared by introducing a trolley to construct a growth method that can regulate the deposition area, precisely control the growth time, and achieve rapid temperature reduction. Optical microscope and atomic force microscope are used to characterize the size, fluorescence intensity and morphology of the prepared materials, which proved that a high-quality ML WSe2 film is successfully prepared by the push-pull trolley method. The large-area, high-quality, single-layer WSe₂ film can be stably prepared by the trolley based method, which provides an important basis for its future application in the information, energy, and biology frontier fields.