壓電效應（piezoelectric effect）

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MPMN » Nanosensors Seek Self-Empowerment: "In 2005, Wang succeeded in using the probe of an atomic-force microscope to bend zinc oxide nanowires, demonstrating that the piezoelectric effect—in which crystalline materials under mechanical stress produce an electrical potential—can operate at the nanoscale. By flexing and returning to their original shape, the zinc and oxide ions produced an electrical current. While the current was minimal, Wang postulated that he could design a practical nanoscale power source by harnessing ubiquitous vibrations such as sound waves, wind, or the flow of blood over an implanted device. These vibrations, he thought, could bend nanowires and thus generate electricity."

壓電效應是指：結晶物質受到機械壓力，而產生電勢；從力學能（mechanical energy）轉換成電能（electrical energy），就稱做壓電效應。