Effects of tensile stress on the resonant response of Al thin-film and Al-CNT nanolaminate nanomechanical beam resonators

• Published in: Current applied physics Vol. 11; no. 3; pp. 746 - 749
• Main Authors: Yi, Yun Jeong, Kim, Young Duck, Bak, Jung Hoon, Lee, Seung Ran, Heo, Kwang, Hong, Seunghun, Char, Kookrin, Park, Yun Daniel
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2011; 한국물리학회
• Subjects: Aluminum; Beams (radiation); Carbon nanotube composites; carbon nanotubes; Elastic modulus; Nanocomposites; Nanomaterials; Nanomechanical resonators; Nanostructure; NEMS; physics; Resonant frequencies; Resonant response; Resonators; Tensile stress; Thin films; 물리학; Carbon nanotube composites; Elastic modulus; NEMS; Nanomechanical resonators; Resonant response
• ISSN: 1567-1739; 1878-1675
• DOI: 10.1016/j.cap.2010.11.054

We report on the dependence of resonant response to applied tensile stress in Al and Al-CNT (carbon nanotube) nanolaminate thin-film nanomechanical beam resonators. We optically measure the dynamic flexural response, while a chip-bending method is utilized to apply a static tension along its axis. For Al thin-film resonators, large and reversible increases in the resonant frequencies are observed along with near doubling of the resonator quality factor; while, for Al-CNT, largely unaffected with a slight decrease in resonant frequencies. Such behavior gives an insight on the role of CNT as a structural reinforcement in the Al thin-film based nanolaminate. ► Realized Al and Al-CNT nanolaminate nanomechanical beam resonators. ► Optically measured resonant frequency and Q-factor of Al and Al-CNT beam resonators. ► Chip-bending method is utilized to apply a tensile stress along beam axis.► Al shows large reversible increase in resonant frequency and Q-factor increase. ► Al-CNT shows slight decreasing in resonant frequencies and Q-factor.