Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 58 for “"NEMS"”.
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Laser-driven micro-transfer printing for MEMS/NEMS integration
Heterogeneous materials integration, motivated by material transfer processes, has evolved to address the technology gap between the conventional micro-fabrication processes and multi-layer functional device integration. In its basic embodiment, micro-transfer printing is used to deterministically …
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Reducing Subthreshold Leakage Power Through Hybrid MOSFET-NEMS Power Gating
… type of switch, a Nanoelectromechanical Systems (NEMS) switch, presents an air gap between the source and drain while in the off state, eliminating subthreshold leakage current. The NEMS switch is slower to operate and only has a finite number of switching before breaking. They should be switched …
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Design and Modeling Environment for Nano-Electro-Mechanical Switch (NEMS) Digital Systems
… type of Nano-Electro-Mechanical Switch (NEMS) at the physical, logical and circuit level. NEMS are switching devices, which have virtually zero leakage current, 1-3 V operation voltage, 1-10 ns switching time, and small footprint. NEMS switches can be easily hybridized with CMOS at the …
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Nutrition environmental measures for Asian restaurants and Asian grocery stores
… Nutrition Environment Measures Surveys (NEMS) provide valid and reliable observational measures of community and consumer nutrition environments (Saelens, et al. 2007). Although it has been adapted for some international communities, none have addressed the growing Asian population in the …
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Nano-electro-mechanical systems fabricated by tip-based nanofabrication
… the use of a heated AFM tip for fabrication of NEMS devices. Two critical challenges hindering TBN from NEMS fabrication are addressed in this thesis. First, we experimentally found out that polystyrene nanopatterns deposited by a heated AFM tip can serve directly as etch mask and transfer the …
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First Principles Study Of Tribopolymerization On Conductive Material Surfaces
… and Nano-electro-mechanical system (MEMS and NEMS) transistors. MEMS and NEMS, analogous to atomic force microscopy (AFM) devices, design with mechanical switching motions to reduce the power consumption caused by maintaining the open-circuit voltage in traditional field-effect transistors, …
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Modeling and characterization of nanoelectromechanical systems
… the size of MEMS to nanomechanical systems (NEMS). Since NEMS are just a couple of 100 nm in size, highly integrated sensor applications are possible. Since NEMS consume only little energy, this will allow continuous monitoring of all the important functions in hospitals, in manufacturing …
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Graphene NanoElectroMechanical Resonators and Oscillators
… block for NanoElectroMechanical Systems (NEMS). In the first parts of the thesis, I will discuss the fabrications and measurements of typical graphene NEMS resonators, including doubly clamped and fully clamped graphene mechanical resonators. I have developed a electrical readout technique …
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The mode-dependent dynamics of nonlinear nanomechanical resonators
With the extreme miniaturization of NEMS, the role of nonlinear dynamics has become increasingly important -- even when the dynamics are driven by the Brownian force. This nonlinearity has imposed a mechanical noise floor on the linear frequency measurements made in sensing applications. Given that …
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Nanoscale membranes for electromechanical systems
Micro- and nano-electromechanical systems (MEMS/NEMS) are a technology field that branched out of semiconductor integrated circuit (IC) manufacturing about four decades ago, and one that forms the backbone of the Internet of Things era. However, as MEMS devices are becoming ubiquitous, they are …
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Characterization of Mechanical Properties at the Micro/Nano Scale: Stiction Failure of MEMS, High-Frequency Michelson Interferometry and Carbon NanoFibers
… (MEMS) and NanoElectroMechanical Systems (NEMS) - a.k.a. stiction-failure. The adhesive forces between MEMS devices leading to stiction failure are characterized in this dissertation analytically and experimentally. Specifically, the adhesion energy of poly-Si μcantilevers are determined …
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Carbon nano-relays for low power switching
… are demonstrated as a toolkit for investigating NEMs based low power switching. The first is a vertical carbon nano-relay, consisting of a vertically aligned carbon nanotube/fiber (CN) between two contacts and operated by pull-off, and the second, a double graphene switch, consisting of two …
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Computational analysis of thermodynamic and mechanical properties of nano-materials
… fabrication of nano-electro-mechanical systems (NEMS). The design, optimization and fabrication of NEMS for various applications can be accelerated by developing accurate physical theories, and computational design tools to describe the function of nano-devices. When the characteristic length of …
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Nanomechanical and nanoelectromechanical phenomena in 2D-atomic crystals : a scanning probe microscopy approach
… small-scale nano electromechanical systems (NEMS) currently beyond the reach of conventional characterisation techniques. Finally we pave the way forward to future NEMS and demonstrate some of the steps taken towards progress in the field.
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DESIGN, COMPACT MODELING AND CHARACTERIZATION OF NANOSCALE DEVICES
… transistors are nano-electromechanical systems (NEMS), with potential applications in filters, stable frequency sources, non-volatile memories and reconfigurable and neuromorphic electronics.
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Modeling of mechanical energy dissipation of low-dimensional resonators
Nanoelectromechanical systems (NEMS) made from low-dimensional materials based on carbon, transition metal dichalcogenides, and their combinations have opened up new possibilities in high-precision sensing, signal processing, and studies of fundamental physical phenomena. In the heart of the NEMS …
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THE NUTRITION ENVIRONMENT IN RURAL SOUTHERN ILLINOIS: AN AFRICAN-AMERICAN PERSPECTIVE
… Nutrition Environment Measurement Survey-Stores (NEMS-S) in 27 food venues (stores) (Glanz et al., 2007). The qualitative data was coded, categories were established, and themes were derived. The qualitative data analysis software, ATLAS.ti, 7.0 was used in the study. The quantitative data …
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Exploring the Food and Physical Activity Environments and Their Influence on Healthy Behaviors
… using the Nutrition Environment Measures Survey (NEMS) for all food outlets in Danville, VA, a small regional city within the health disparate region, to compare differences in healthy available food options by block group race and income. The second study expanded NEMS methodology to encompass …
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TUNING AND OPTOMECHANICS OF COUPLED PHOTONIC CRYSTAL NANOBEAM CAVITIES
… process development, device tuning with NEMS actuators, investigation of optical gradient force and tunable cavity optomechanics. High efficiency resonance tuning by electrostatically shifting the coupled nanobeam cavities in the lateral direction has been achieved. Coupling strength …
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DIMENSIONALITY REDUCTION OF 2D MATERIALS: NANODEVICES AND IN-SITU NANOMECHANICAL ANALYSIS
… materials in nanoelectromechanical systems (NEMS) to produce devices with increased sensitivity at the atomic level.
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