Progress on the in situ imaging of growth dynamics of two-dimensional materials

Abstract

One key issue to promote the industrialization of two-dimensional (2D) materials is to grow high-quality and large-scale 2D materials. Investigations of the growth mechanism and growth dynamics are of fundamental...

In SituImaging of Two-Dimensional Crystal Growth Using a Heat-Resistant Optical Microscope

“…Many tools have been used in the in situ imaging of crystal growth, − including a transmission electron microscope (TEM), , a scanning electron microscope, , a scanning tunneling microscope, , a differential reflectance spectroscope, and an optical microscope. − However, these tools cannot sustain the high-temperature growth environment, and the previous in situ experiments were conducted with a miniature growth chamber. Therefore, in situ imaging crystal growth inside conventional furnace systems [such as chemical vapor deposition (CVD)] remains challenging, due to the lack of heat-resistant in situ imaging tools …”

“…Therefore, in situ imaging crystal growth inside conventional furnace systems [such as chemical vapor deposition (CVD)] remains challenging, due to the lack of heat-resistant in situ imaging tools. 16 Motivated by the need for in situ imaging in deposition systems, we have developed a high-resolution heat-resistant optical microscope, in which single-wavelength imaging with an aspheric silica objective was used to reduce the spherical aberration, the chromatic aberration, and the thermal emission background. This special optical microscope has been incorporated into a CVD system to image dynamics of crystal growth.…”