UC Riverside

The Scanning Tunneling Microscope (STM) is well known as one of the best spatially resolved microscopes today. Due not only to its microscopic ability, but also to its capability to manipulate individual atoms or molecules, it has been used as a very powerful tool in furthering the miniaturization of nanodevices. In my thesis, molybdenum difulfide(MoS2) and its derivatives on Cu(111) at low temperature in ultra-high vacuum(UHV) conditions are systematically investigated using a home-built STM. By slightly changing the preparation methods, we can synthesize MoS2 monolayer, Mo2S3 monolayer or Mo6S6 nanowires. Density Functional Theory (DFT) calculations were also performed to support and interpret experimental results.