2026-09-21T17:41:48Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/42240 2023-07-11 col_2142_14787 col_2142_5131 com_2142_9630 com_2142_234 com_2142_5130

Yu, Min-Feng Vakakis, Alexander F. Yu, Min-Feng Vakakis, Alexander F. Bergman, Lawrence A. Saif, M. Taher A. Cho, Han Na 2013-02-03T19:28:57Z 2013-02-03T19:28:57Z 2012-12 2013-02-03T19:28:57Z 2012-12 During the last decade, we have witnessed that micro/nanomechanical resonators have revolutionized fundamental and applied science. For example, nanosensors can be designed to sense physical quantities at the smallest scale, e.g., masses in atomic scale and forces as small as spin or hydrogen bonds; micro/nanoelectromechanical system (M/NEMS) based RF devices reach extremely high frequencies in their performance as filters, switches, and radio transmitters. Due to their small size and low damping, these devices often exhibit significant nonlinearity, which results in limiting the operational range when they are intended to operate in a linear regime. However, nonlinear resonance, easily realized in a micro/nanomechanical system, also opens up a whole new window for the study of nonlinear dynamics and, more importantly, the development of paradigm-shifting applications. In this study, we integrate geometric nonlinearity intentionally into micro/nanomechanical systems to enhance their performance by harnessing the nonlinear characteristics. For example, we originated the use of nonlinear instabilities to sense extremely small masses at femtogram-scale; the development of a tunable, broadband, nonlinear nanoresonator by employing carbon nanotube; the successful realization of intentional strong nonlinearity induced to a microsystem by a nanoscale attachment; new design of a nonlinear atomic force microscopy (AFM) system to provide extremely high sensitivity to material properties. To realize nonlinear behavior, we exploited the remarkable properties of nanomaterials such as carbon nanotube and boron nitride nanotube, extreme stiffness in the axial direction and capacity to sustain large mechanical strains, through a unique fabrication technique of nanomaterial integration. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-07-20T21:40:34Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Dissertation_Final (2).docx: 22766961 bytes, checksum: 65d098e239c2194bfa9c6b2808e43442 (MD5) Dissertation_Final (2).pdf: 13483834 bytes, checksum: 98643b969c7aa32c2a6305d9999da65f (MD5) Made available in DSpace on 2013-02-03T19:28:57Z (GMT). No. of bitstreams: 3 Han_Cho.pdf: 28967663 bytes, checksum: 54d3d7be14e60778af483645ea6eb867 (MD5) license.txt: 4054 bytes, checksum: 3775d0eb988f40f612462a28f676ca96 (MD5) Dissertation_Final (2).docx: 22766961 bytes, checksum: 65d098e239c2194bfa9c6b2808e43442 (MD5) http://hdl.handle.net/2142/42240 en Copyright 2012 Hanna Cho Micro/nano-mechanical systems Micro/nano-resonators Intentional nonlinearity Nano-materials Micro/nano-fabrication Intentional nonlinearity in the design of dynamic micro/nanomechanical resonators via nanomaterial-integrated fabrication text Mechanical Sci & Engineering 1917 Mechanical Engineering 0133 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Mechanical Enginerng -UIUC 10KS0133PHD