High-sensitivity accelerometer composed of ultra-long vertically aligned barium titanate nanowire arrays

• Published in: Nature communications 2013-11, Vol.4 (1), p.2682-2682, Article 2682
• Main Authors: Koka, Aneesh, Sodano, Henry A.
• Format: Article
• Language: English
• Subjects: 639/925/927/359; 639/925/930/1032; Accelerometers; Bandwidths; Barium; Batch processing; Energy; Humanities and Social Sciences; multidisciplinary; Nanowires; Science; Science (multidisciplinary); Sensors
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/ncomms3682

A configuration that shows great promise in sensing applications is vertically aligned piezoelectric nanowire arrays that allow facile interfacing with electrical interconnects. Nano-electromechanical systems developed using piezoelectric nanowires have gained interest primarily for their potential in energy harvesting applications, because they are able to convert several different sources of mechanical energy into useful electrical power. To date, no results have demonstrated the capability to use aligned piezoelectric nanowire arrays as a highly accurate nano-electromechanical system based dynamic sensor with a wide operating bandwidth and unity coherence. Here we report the growth of vertically aligned (~45 μm long) barium titanate nanowire arrays, realized through a two-step hydrothermal synthesis approach, and demonstrate their use as an accurate accelerometer. High sensitivity of up to 50 mV g −1 is observed from the sensor composed of vertically aligned barium titanate nanowire arrays, thus providing performance comparable to many of the commercial accelerometer systems. Aligned piezoelectric nanowires show great promise for sensing applications. Here, the authors demonstrate the synthesis of vertically aligned arrays of ultra-long barium titanate nanowires and their application in a high-sensitivity nano-electromechanical accelerometer.