Controllable growth of two-dimensional WSe2 using salt as co-solvent†,CrystEngComm

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Controllable growth of two-dimensional WSe2 using salt as co-solvent†
CrystEngComm ( IF 2.6 ) Pub Date : 2018-09-11 00:00:00 , DOI: 10.1039/c8ce01162a
Xiangzhuo Wang _{1,

2,

3,

4} , Yongkai Li _{1,

2,

3,

4} , La Zhuo _{1,

2,

3,

4} , Jingchuan Zheng _{1,

2,

3,

4} , Xianglin Peng _{1,

2,

3,

4} , Zefeng Jiao _{1,

2,

3,

4} , Xiaolu Xiong _{1,

2,

3,

4,

5} , Junfeng Han _{1,

2,

3,

4,

5} , Wende Xiao _{1,

2,

3,

4,

5}

Affiliation

Various structures of two-dimensional (2D) WSe₂ were controllably grown in a chemical vapor deposition (CVD) system. Using salt as the co-solvent and surfactant, we were able to grow monolayer single-crystalline WSe₂ flakes with lateral size of up to 215 μm and monolayer polycrystalline WSe₂ with lateral size of a few millimeters on amorphous SiO₂ substrates. Optical microscopy, atomic force microscopy, Raman spectra, photoluminescence spectra and X-ray photoelectron spectra measurements disclosed high quality of as-grown 2D WSe₂. Moreover, multilayer WSe₂ flakes with spiral dislocations and uniform size were also achieved. Our study demonstrates that the salt-assisted CVD technique can be applied for the controllable synthesis of 2D transition metal dichalcogenides with various structures and morphologies, paving the way for developing novel catalysts and electronic devices.

中文翻译：

使用盐作为助溶剂可控地生长二维WSe ₂†

在化学气相沉积（CVD）系统中可控地生长了二维（2D）WSe _2的各种结构。使用盐作为共溶剂和表面活性剂中，我们能够生长单层单晶WSE _2个薄片具有高达215微米，多晶单层WSE的横向尺寸₂具有几毫米的横向尺寸上的无定形的SiO ₂基板。光学显微镜，原子力显微镜，拉曼光谱，光致发光光谱和X射线光电子能谱测量显示了已生长的2D WSe _2的高质量。此外，多层WSe ₂还获得了具有螺旋位错和均一尺寸的薄片。我们的研究表明，盐辅助CVD技术可用于具有各种结构和形态的2D过渡金属二卤化金属的可控合成，为开发新型催化剂和电子设备铺平了道路。

更新日期：2018-09-11

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