Directions for Building the Model

Most of the directions for making the model can be accessed at our Web site "Exploring the Nanoworld with LEGO® Bricks," http://mrsec.wisc.edu/Edetc/LEGO/index.html.

To get an idea of how your model will look when finished, observe the triangular LEGO®® model in the photo. This model contains a laser pointer and a cantilever with a triangular LEGO®R probe on its underside and a mirror atop it. In this model, the cantilever tip is in physical contact with a LEGO®® surface. The LEGO®® pegs on the surface deflect the cantilever. Light from the pocket laser reflects from the mirror on the cantilever and shines onto a wall.

After you build your model, have someone attach small bricks to the LEGO surface and then place the SPM behind a screen. Using the laser beam spot movement and horizontal surface movement, try to map the locations of the small bricks on the surface. Sketch your map of the surface on a sheet of paper.

Placing 1x1 bricks on a flat plate "substrate" makes raised bumps to push the cantilever (and the laser beam spot) up and down. A "handle" can be attached to this substrate and used to map to positions of the bumps. Place the SPM and substrate on a sheet of paper. Move the substrate back and forth (with the handle always pointing in the same direction). When a bump pushes the beam spot up, make a mark on the paper at the end of the handle. Note that the map produced will be rotated 180O from the actual bump positions.

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