Equipment Type:

Microscopy/Surface Analysis

Scanning Tunneling Microscopes (STM)

Instrument Capabilities

The ATM 300 STM is an ambient scanning tunneling microscope (STM) from RHK. The instrument is designed for atomic-scale imaging and characterization of electrically conductive surfaces using the tunneling current between a sharp probe tip and the sample.

Key features:

• 5 × 5 µm XY scan range, 0.5 Å lateral resolution and 0.1 Å Z resolution
• Thermal drift below 1 Å/min
• Tunneling current <1pA
• Bias voltage: ±1V or ±10V with 10 turn potentiometer
• Atomic-resolution surface imaging
• Constant-current and constant-height STM imaging
• Local surface morphology and atomic structure
• Electronic characterization through I–V spectroscopy
• Local density-of-states measurements using scanning tunneling spectroscopy (STS), when configured appropriately
• Investigation of surface defects, steps, terraces, adsorbates, and atomic-scale structures
• Measurements on conductive or semiconductive materials

Fees and Policies

• UT Users: $5/hour
• Higher Education/State Agencies: $12/hour
• Corporate/External Users: $12/hour

Traning

Please contact Dr. Raluca Gearba to schedule a training session.