使用接触角检测表面洁凈度
Contact angle measurements can determine the surface energy, , of a solid. To accurately
measure the surface energy, we must use a set of fluids and the Lewis acid/base theory with the
contact angles, q, for each fluid. However, a simple contact angle measurement with water will
give an approximate answer. This is useful because almost all "contaminants" on a surface affect
the measured surface energy. This connection is what we exploit when using contact angles.
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