GENERATION OF ELECTRICAL ENERGY FROM HIGHLY ALIGNED CNT SHEET AND ITS APPLICATION TO MOTION SENSING

摘要

Carbon nanotube (CNT), which has one-dimensional atomic structure, has been utilized in lots of research areas because of its outstanding mechanical, electrical, and thermal characteristics [1]. Especially in electronic device application, its outstanding electrical characteristics makes it d istinguishable compared than other materials. Among its variety of electronic application fields, energy harvesting by fluid has caught the attention of researchers [2-11]. Previous research proved that CNT can generate electrical energy by converting mechanical energy of fluid into electrical energy. Mechanism of the energy harvesting is related to free charge carrier dragging effect, and its electrical energy generation performance can be enhanced according to the polarity of liquid and structural alignment [7, 12]. Most of the studies previously reported used flowing fluid as driving sources, such as liquid and gas flow. In this work, we utilize a highly aligned CNT sheet, which consists of continuously connected CNT strings, to drag free charge carriers effectively. Furthermore, we used Coulombic interaction by static electricity as a flow-less driving source to protect the CNT from frictional structure damages.