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.
Results
Showing 1 to 20 of 43 for “"electrical contacts"”.
-
Electrical contacts on two-dimensional transition metal dichalcogenide semiconductors
… Studies have shown that van der Waals (vdW) contacts formed by dry transfer of graphene and metals can avoid damage to atomically thin TMDs caused by metal deposition. My doctoral thesis focuses on study of metal-2D TMD interfaces through high resolution cross-section scanning transmission …
-
Fabrication and Characterization of Electrical Contacts for Charge Transport Study in Molecular Electronics.
… nanoparticle for the conductance study and the electrical characterization are described. From the results of electrical conduction, we estimate the contact area (~20.1 nm2) and the number of molecules between nanoparticle and surface-bound molecules, and then calculate the resistances of single …
-
Method and instrumentation for the measurement and characterization of MEMS fabricated electrical contacts
MEMS fabricated electrical contacts consist of two MEMS fabricated surfaces which are physically separated and brought together for the purpose of carrying current. MEMS fabricated electrical contacts are used in a wide variety of applications including MEMS relays, wafer probing applications, and …
-
MEMS relays for make-break power switching applications : {111} silicon etched planar electrical contacts
… is important because, for safety reasons, electrical codes stipulate that loads in certain power applications must be disconnected by open gaps. This requirement imposes significant isolation, heat dissipation, tribology and reliability constraints on a relay.The objective of this research …
-
Simulation approach to understanding materials in contact
… design methods for the enhanced development of electrical contacts. Additionally, techniques for obtaining real data to validate the methods being explored are provided.<br /> The focus is on developing a novel model to accurately simulate the contact area resulting from elastic-plastic …
-
Minimal Constraint and Precision Placement in Cyclic Testing of High Life-Cycle Products
… technology to take hold, further development of electrical contacts that can both pass high amperage and undergo a high cycle life needs to occur. The development of these electrical contacts is a highly experimental process, and thus establishing a method and test equipment to determine the …
-
Investigation into the Design of High-Power Plug-In Shipboard Electrical Connectors
High-power electrical connections are an essential component to all electric power systems. Such connections are important to the Navy as it increases the use of electric energy in ships. High power involves both high current and high voltage simultaneously and hence connections require careful …
-
Fabrication and characterization of VCSEL based smart pixels
… the VCSEL to the integrated circuits and making electrical contacts. All three techniques remove the substrate from the VCSEL wafer leaving an array of individual VCSELs bonded to individual pixels. This dissertation presents the successfully bonding of 8x8 and/or 4x4 VCSEL arrays to CMOS, MESFET …
-
Development and Design of Constant-Force Mechanisms
… by discussing the adaptation of CFMs for use in electrical contacts and presenting the results of a design case study which successfully developed a constant-force electrical contact (CFEC).
-
A MEMS thermoelectric generator
… and limits the high temperature operation. Poor electrical contacts are also observed and characterized. Directions for future work are suggested to improve the efficiency and mechanical strength of the device.
-
An autonomous self-reconfigurable modular robotic system with optimised docking connectors
… then thoroughly tested for accuracy in mobility, electrical and structural stability, inter-module communication and power transfer, self-assembly, self-reconfiguration and self-healing, among others. The outcome of these testing procedures proved that it is indeed possible to optimise the docking …
-
Piezoresistive Sensing of Bistable Micro Mechansim State
… of polysilicon, thus eliminating the need for electrical contacts. Changes in position are detected by observing changes in resistance across the mechanism. Sensing the state of bistable mechanisms is critical in their various applications. The research in this thesis advances the modeling …
-
Synthesis and electrical property measurements of individual layered transition metal dichalcogenide nanotubes and nanowires
… Electron beam lithography was used to make electrical contacts to the nanowires. Once the contacts were made, two point room temperature current voltage curves were recorded for MoS2, ReS2, and ReSe 2 nanotubes. The current voltage characteristics displayed I-V curves that were nearly …
-
Field and current induced magnetization reversal in patterned Pseudo Spin Valve devices
… was used to define the devices and their electrical contacts. The PSV stack comprised a layer of soft ferromagnetic material Ni80oFe20 (NiFe or Py), a non-magnetic spacer layer of Cu, a hard ferromagnetic layer of Co and a capping layer of Au. The current flowed in plane (CIP) and the …
-
Computing Fibers: Architectures and Applications
… of flexible interposers which can remap electrical contacts of complex integrated circuits to be more amenable to the convergence thermal draw process. These integrated circuits are then used to design an expandable system architecture that can accommodate multiple sensors along with …
-
Studies of bilayer and trilayer graphene
… Metal was then evaporated onto samples to create electrical contacts for use in gated measurements. These samples, along with my procedure, will be used for future measurement by members of the Dresselhaus research group. These gated graphene devices will be used with gate-modulated resonant Raman …
-
Liquid Crystal Optics For Communications, Signal Processing And 3-d Microscopic Imaging
… are non-pixelated and can be controlled either electrically or optically. Instead of the typical pixel-by-pixel control as is custom in LC devices, the phase profile across the aperture of these novel LC devices is varied through the use of high impedance layers. Due to the presence of the high …
-
Pulse-field actuation of collinear magnetic single crystals
… a low actuation stress is sufficient or the electrical contacts required to activate a piezoelectric device are undesirable.
-
Relaxation Dynamics of Photoexcited Carriers in Graphene
… used to estimate mobility without the need for electrical contacts.
-
A Self-Retracting Fully-Compliant Bistable Micromechanism
… systems, including external actuators and electrical contacts are 1140 μm by 625 μm (individual SRFBM are less than 300 μm by 300 μm). These systems have been tested, demonstrating on-chip actuation of bistable mechanisms. Power requirements for these systems are approximately 150 mW. …
Page 1 of 3