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Nano Research

Article Title

Superbroad-band actively tunable acoustic metamaterials driven from poly (ethylene terephthalate)/carbon nanotube nanocomposite membranes

Authors

Ying Li, School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China;National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments, Harbin Institute of Technology, Harbin 150080, China
Wen Ning, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University & Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
Qingyu Peng, National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments, Harbin Institute of Technology, Harbin 150080, China;Shenzhen STRONG Advanced Materials Institute Ltd. Corp, Shenzhen 518000, China
Minglong Yang, National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments, Harbin Institute of Technology, Harbin 150080, China
Dongyi Lei, School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
Siyao Guo, School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
Peng Liu, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University & Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
Kaili Jiang, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University & Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
Xiaodong He, National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments, Harbin Institute of Technology, Harbin 150080, China;Shenzhen STRONG Advanced Materials Institute Ltd. Corp, Shenzhen 518000, China
Yibin Li, National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments, Harbin Institute of Technology, Harbin 150080, China;Shenzhen STRONG Advanced Materials Institute Ltd. Corp, Shenzhen 518000, China

Keywords

poly (ethylene terephthalate)/carbon nanotube nanocomposite membrane, active control, acoustic metamaterials, noise reduction

Abstract

Actively tunable acoustic metamaterials have attracted ever increasing attention. However, their tunable frequency range is quite narrow (tens of Hz) even under ultrahigh applied voltage (about 1,000 V). Here, we report a superbroad-band actively tunable acoustic metamaterials with the bandwidth over 400 Hz under a low voltage. In the actively tunable acoustic metamaterials, the acoustic membrane is a laminated nanocomposite consisting of a poly (ethylene terephthalate) (PET) and super-aligned carbon nanotube (CNT) drawn from CNT forest array. The laminated nanocomposite membrane exhibits adjustable acoustic properties, whose modulus can be adjusted by applying external electric field. The maximum frequency bandwidth of PET/CNT nanocomposite membrane reaches 419 Hz when applying an external DC voltage of 60 V. Our actively tunable acoustic metamaterials with superbroad-band and lightweight show very promising foreground in noise reduction applications.

Publisher

Tsinghua University Press

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