title: Nanotube aerogel sheet flutter for actuation, power generation, and infrasound detection.
abstract: Electromagnetic induction (EMI) is a mechanism of classical physics that can be utilized to convert mechanical energy to electrical energy or electrical to mechanical energy. This mechanism has not been exploited fully because of lack of a material with a sufficiently low force constant. We here show that carbon nanotube (CNT) aerogel sheets can exploit EMI to provide mechanical actuation at very low applied voltages, to harvest mechanical energy from small air pressure fluctuations, and to detect infrasound at inaudible frequencies below 20 Hz. Using conformal deposition of 100 nm thick aluminum coatings on the nanotubes in the sheets, mechanical actuation can be obtained by applying millivolts, as compared with the thousand volts needed to achieve giant-stroke electrostatic actuation of carbon nanotube aerogel sheets. Device simplicity and performance suggest possible applications as an energy harvester of low energy air fluctuations and as a sensor for infrasound frequencies.
authors.affiliation: 1] Department of NanoMechatronics Engineering and BK21 Plus Nano Convergence Technology Division, College of Nanoscience and Nanotechnology, Pusan National University, Busan 609-735, South Korea [2].
authors.forename: Tae June
authors.initials: TJ
authors.lastname: Kang
authors.affiliation: 1] School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, South Korea [2].
authors.forename: Taewoo
authors.initials: T
authors.lastname: Kim
authors.affiliation: School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Eui Yun
authors.initials: EY
authors.lastname: Jang
authors.affiliation: School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Hyeongwook
authors.initials: H
authors.lastname: Im
authors.affiliation: The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75083, USA.
authors.forename: Xavier
authors.initials: X
authors.lastname: Lepro-Chavez
authors.affiliation: The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75083, USA.
authors.forename: Raquel
authors.initials: R
authors.lastname: Ovalle-Robles
authors.affiliation: The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75083, USA.
authors.forename: Jiyoung
authors.initials: J
authors.lastname: Oh
authors.affiliation: The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75083, USA.
authors.forename: Mikhail E
authors.initials: ME
authors.lastname: Kozlov
authors.affiliation: The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75083, USA.
authors.forename: Ray H
authors.initials: RH
authors.lastname: Baughman
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Hong H
authors.initials: HH
authors.lastname: Lee
authors.affiliation: School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Yong Hyup
authors.initials: YH
authors.lastname: Kim