| The Atomic Model The model illustrates the structure of metals on an atomic scale and serves as a visual metaphor for interactions of many kinds. The detail and the dynamism of this display are purely poetic for me; one, in that its motion is so intriguing and two, in the level of thought it provokes. This model is a perfect jumping off point for lessons in crystal formation and could be accompanied by text and photographs illustrating similar patterns found in nature such as ice forming on the surface of lakes, bubbles arrayed on the surface of water, etched cross-sections of meteorites, snowflakes under a microscope, etc. As a life metaphor, the model is kept from equilibrium by the steady input of vibration just as the energy input from the sun keeps the systems of life on earth out of equilibrium. The model is an example of a gradient reduction system, as the gradient steepens equalization occurs at the grain boundaries and through the ceaseless cracking and rending of the lattice as a whole as long as the vibration persists. A second level of viewer interaction is achieved via the manipulation of a probe inserted into the gap between the layers of glass and on into the two-dimensional aggregate of vibrating spheres providing another method for dislocating the lattice. As the viewer pushes the probe into the ball mass the pointed tip causes multiple fractures and tearing in the matrix. A similar phenomenon is observed when driving the prow of a boat into a thin skim of pond ice and seeing it part and fracture. The Atomic model contains 45,000 black acrylic spheres one eighth of an inch in diameter that stack vertically in the void between two sheets of plate glass 30 inches square comprise this two- dimensional atomic model. The assembly rests upon an isolating shock mount and is driven by a variable speed vibrating electric motor controlled by the viewer. The vibration provides a uniform dislocating influence causing the ordered domains of closely packed spheres to persist and migrate throughout the plane. Regions of order form and tolerate a few internal local anomalies but conflict on a larger scale to produce linear boundaries of connected disorder. As many crystals start to grow in the same region, sooner or later they will interfere with each other. Neighboring crystals differing in no other way save in the direction of their atom rows in space cannot join without some imperfection. Nature abhors a vacuum, practicing imperfection and approximation. |
