Conditions
There are five conditions that must be satisfied to use this technique :
1. The sample must have a flat shape of uniform thickness
2. The sample must not have any isolated holes
3. The sample must be homogeneous and isotropic
4. All four contacts must be located at the edges of the sample
5. The area of contact of any individual contact should be at least an order of magnitude smaller than the area of the entire sample.
Read more about this topic: Van Der Pauw Method
Famous quotes containing the word conditions:
“Purity is not imposed upon us as though it were a kind of punishment, it is one of those mysterious but obvious conditions of that supernatural knowledge of ourselves in the Divine, which we speak of as faith. Impurity does not destroy this knowledge, it slays our need for it.”
—Georges Bernanos (1888–1948)
“No great idea in its beginning can ever be within the law. How can it be within the law? The law is stationary. The law is fixed. The law is a chariot wheel which binds us all regardless of conditions or place or time.”
—Emma Goldman (1869–1940)
“Statecraft is soulcraft. Just as all education is moral education because learning conditions conduct, much legislation is moral legislation because it conditions the action and the thought of the nation in broad and important spheres of life.”
—George F. Will (b. 1941)