Atomic scale imaging, manipulation, and spectroscopy Mechanical and electrical properties of molecules in self-assembled films Ambient pressure photoelectron spectroscopy for environnemental sciences Studies of friction, adhesion, and wear at the nanometer scale Electronic, mechanical, and chemical properties of nanoclusters Structure of thin liquid films and wetting Nanoscale material imaging and manipulation (Molecular Foundry) Catalytic and chemical properties of surfaces
Updated by Franck, May 20 2007 |
Design of low temperature UHV STM/DFM
The systems consist of two chambers (See Fig. 1) :
1. The preparation chamber
A sample introduction system
Typical surface preparation equipments (sputtering and annealing[1])
Characterization apparatuses (LEED[2], AES[3] and RGA[4])
2. The microscope chamber An on top He and Nitrogen crypostat[5]
A wobble stick for in-situ sample and tip transfer[6]
Gas introducers for in-situ LT adsorption experiments[7]
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Fig.1 Top view of the UHV system. The right hand side is the preparation chamber and the left hand side is the microscope chamber. |
The microscope is designed so that high spatial resolution and low noise are achieved.
High mechanical stability obtained by pnuematic damping of the UHV system as well as springs[8] and eddy cyrrent damping[9] of the microscope body (see Fig. 2)
Low drift rate, which is minimized by the choice of amterials with similar thermal expantion coefficients (Macor and Ti) and a symmetric design
Proper shielding of the electric wires, by twisting them when necessary and pasing them through the cryostat separated in proper groups that are shielded from each other by metallic pipes |
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Fig.2 Side view and front view of the microscope body. |
Researchers involved in designing and construction:
Markus Heyde, Udo D. Schwarz, Tomoko Shimizu, Yabing Qi, and Aitor Mugarza
| Second STM/DFM under construction |
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