The dark side of the cell

In class today we will listen to excerpts from Anne Niemetz and Andrew Pelling’s installation “The Dark Side of the Cell.” For more information about their audio and video recordings/compositions visit the website:

http://www.darksideofcell.info/

Figure 1. a) An optical microscope image of a triangular AFM cantilever. At the apex of the triangle is a small tip that is barely visible and appears as a small block spot. A cartoon zoom of the side view of the cantilever shows the pyramidal shape of the tip that has an approximate radius of about 20 nanometers. In b) a schematic of the AFM cantilever is shown. The tip itself has a 35 degree half opening angle. c) A cartoon of the AFM setup. The AFM cantilever is mounted on the end of a tube piezoelectric crystal. As the crystal moves the tip over the surface, a laser monitors the tip displacement. The laser is bounced off the back of the cantilever into a position sensitive photodiode that records the cantilever motion. A computer assembles a three dimensional image based on this data.