Pra.Ma.

for atomic and molecular manipulation

Features:

• High stability (dz<1pm)
• Very small drift at low temperature: <2Å/h in thermal equilibrium
• extremely high LHe hold time (>72h for 4l LHe guaranteed, 100h achieved)
  
• Scan range: 1µm x 1µm x 0.2µm at 6K
• Powerful software with spectroscopy and nanostructuring support
• Minimum tunneling current: 500 fA
• Optical access to sample
• Preparation, analysis and direct sample transfer at temperatures down to 20K

Applications:

The LT-STM is specially designed for working at atomic scale at low temperature (i.e. to perform atomic / molecular manipulation or local spectroscopy). The LT-STM software offers a wide range of atomic / molecular manipulation techniques. Lateral manipulation and the formation of atomic scale structures can be performed either in constant current or constant height mode. Furthermore in combination with the lateral manipulation techniques the application of different tunneling voltage pulses together with simultaneous control over the tip surface distance can be used for the controlled chemical bond breaking and bond formation. So far the dissociation, the synthesis, the desorption and the controlled conformational change of molecules have been demonstrated.

Product description:

The LT STM is very well known for its outstanding stability and performance in the scientific community.
It has a modified Besocke beetle design which ensures its high stability (dz<1pm) and only a small drift. The STM is thermally isolated. Its temperature can be varied between 6 ... 300 K. The low temperature of the STM freezes the motion of most adsorbates that can be evaporated onto the sample surface either inside or outside the STM. The surface / adsorbates can be investigated for weeks. No degradation of the sample will be observed as long as the 4K radiation shield that surrounds the STM remains cold. Due to the design of the cryostat a very low helium consumption is achieved which requires to refill only 4 liters of liquid helium every 48 hours when the STM is at its lowest temperature.

Options:

A special LT-STM scan head is available to host typical SPECS sample holders for adding a LT-STM system as 'bolt-on' version to more complex and/or existing surface science systems. Integrated superconduction coils allow to apply DC magnetic fields >0.2T. Future upgrade paths include the integration of a dedicated Q⁺ sensor head for AFM measurements

Please see www.lt-stm.com for further information