Experimental Facilities
Our laboratory operates ultrahigh-vacuum scanning probe microscopy, molecular beam epitaxy, Janus 2D-material fabrication, temperature-programmed desorption, radio-frequency STM instrumentation, atomic force microscopy, chemical vapor deposition, and SiC bilayer graphene synthesis systems.
MBE1: Se, Te, and two metal sources
A combined low-temperature scanning tunneling microscopy / variable-temperature scanning probe microscopy system integrated with in-situ molecular beam epitaxy for transition-metal dichalcogenide growth and surface studies.
Janus 2D-material preparation with Raman characterization
A dedicated ultrahigh-vacuum system for fabricating Janus transition-metal dichalcogenide structures, with Raman characterization capability for monitoring and evaluating material quality.
TPD measurement and surface reaction analysis
A temperature-programmed desorption system used to study desorption, surface reactions, adsorption states, and thermal stability of prepared surfaces and thin-film materials.
MBE2: S, Se, and two metal sources
A room-temperature scanning tunneling microscopy system integrated with in-situ molecular beam epitaxy for TMD growth, surface characterization, and rapid feedback during sample development.
High-frequency STM-related instrumentation
A patented radio-frequency reflectometry STM platform developed for advanced scanning probe measurements and high-frequency electronic characterization at the nanoscale.
Atomic force microscopy and surface morphology
Park atomic force microscopy systems for topographic imaging, surface morphology measurements, and complementary characterization of 2D materials, thin films, and nanostructured surfaces.
Chemical vapor synthesis of 2D materials
Chemical vapor deposition systems used for the synthesis of graphene, transition-metal dichalcogenide monolayers, and related two-dimensional materials.
Face-to-face synthesis of bilayer graphene on SiC
A dedicated system for synthesizing bilayer graphene on silicon carbide using a face-to-face growth configuration.
Spare UHV chambers, HREELS, and four-probe station
The laboratory also maintains spare ultrahigh-vacuum chambers and additional instrumentation, including a high-resolution electron energy-loss spectroscopy system and a four-probe station that are currently in idle state.
Home-made microscopy data processing software
This home-made software has capability surpassing WSxM, and is similar to SPIP. It is fully tested for RHK .sm4 data, but also supports Omicron Scala/Matrix, Nanonis, Createc, and image formats.
