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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 21 for “"Microcantilevers"”.
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Simultaneous nanothermal analysis using heated microcantilevers
… performed with a heated microcantilever. Heated microcantilevers have low thermal mass, resulting in high heating rates with quick response times, and are relative isolated to major heat losses, making them well suited for nanothermal analysis. This work discusses the first reported …
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Probing extraordinary nanoscale energy transfer using bimaterial microcantilevers
… experimental techniques based on the bi-material microcantilevers used in Atomic Force Microscopes (AFM), this thesis has studied several extraordinary energy transfer phenomena at the nanoscale including near-field radiation beyond Planck's law, high thermal conductivity polymers and the optical …
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Simulation of implantation and diffusion processes for electro-thermal microcantilevers
… Microscope (AFM) compatible electro-thermal microcantilevers, capable of independently controlling cantilever temperature and electrical potential/current flow through the end of the tip, are proposed and designed. An important characteristic of these probes is the spatial dopant distribution …
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Advanced materials integration and thermal operation of heated microcantilevers and microcantilever arrays
The student, Hoe Joon Kim, accepted the attached license on 2015-03-10 at 21:34.
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Design and fabrication of electro-thermal microcantilevers for ultrafast molecular sorting and delivery
… are described for six types of electro-thermal microcantilevers. Devices have been tailored for the process of separating mixtures of heterogeneous molecules into discrete detectable bands based on electrophoretic mobility, and delivering them to a conductive substrate using electric fields. …
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Substrate dependance, temperature dependance and temperature sensitivity and resolution of doped-silicon microcantilevers
This thesis aims to characterize microcantilevers with integrated heater-thermometers. This research concentrates on characterization for use in data storage, sensing, surface science, and nano-manufacturing. The rst objective seeks to understand the speci c thermal interactions between a heated …
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Impact of silicon nitride thickness on the infrared sensitivity of silicon nitride-aluminum microcantilevers
This thesis investigates how silicon nitride thickness impacts the performance of silicon nitride - aluminum bimaterial cantilever infrared sensors. A model predicts cantilever behavior by considering heat transfer within and from the cantilever, cantilever optical properties, cantilever bending …
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Design and fabrication of high power microbatteries and high specific strength cellular solids from bicontinuous microporous hierarchical materials
… the fabrication of 3D regular macroporous microcantilevers with Young’s moduli that can be varied from 2.0 to 44.3 GPa. The porosity and deformation mode of the hierarchical material, which depends on the pore structure, determine the Young’s moduli of the microcantilevers. The template …
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Electro-thermal nanoprobes for nanometrology and nanofabrication
… relatively low cost. Current self-heating AFM microcantilevers have technological limitations that inhibit their application towards nanofabrication, including difficulty in maintaining tip shape under harsh conditions, an inability to simultaneously control thermal and electric potentials, and …
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Microcantilever sensors for biochemical detection and analysis
… address several of these issues by introducing microcantilevers having integrated thermal functionality and by introducing nanocrystalline diamond as new material for microcantilevers. Microcantilevers are designed, fabricated, characterized, and used for capture and detection of cells and …
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Silicon Piezoresistive Microcantilever For Potentiometric Sensing
… an electrical readout system comprising Silicon microcantilevers and piezoresistors embedded at the high stress region in cantilever is developed, which facilitates miniaturization of the sensor. The dimension-related quality factor and spring constant of microcantilevers are investigated to …
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Thermomechanical sensitivity of microcantilever in the mid-infrared spectral region
… and modeled for six commercially available microcantilevers, which consist of either an aluminum film on a silicon cantilever or a gold film on a silicon nitride cantilever. The spectral sensitivity of each cantilever was determined by recording cantilever deflection when illuminated with IR …
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Stress and structure evolution during Volmer-Weber growth of thin films
… was developed utilizing piezoresistive silicon microcantilevers, or piezocantilevers. In addition to the thin film stress measurements of Cu made with the piezocantilevers, our collaborators at Sandia National Laboratories have studied thin film growth stresses for Al, Ag, and amorphous Ge …
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Label-free buoyant mass assays with suspended microchannel resonators
… (SMRs) are highly sensitive, batch-fabricated microcantilevers with embedded microchannels that can measure mass with femtogram precision. Biomolecules such as proteins and nucleic acids are denser than water, and their presence can thus be quantified by their buoyant mass, or increase in mass …
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Application of field programmable analog arrays (FPAAs) to fast scanning probe microscopy
… of the work is dedicated to the Q-control of microcantilevers. Since, cantilevers are second-order flexible structures with high resonant frequencies (∼ 50kHz) , Q-control of cantilevers requires estimating velocity at resonant frequencies. High-bandwidth advantage of FPAAs can be exploited to …
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Enabling high-throughput single-cell growth measurements with parallel microchannel resonators
… microchannel resonators (SMRs), which are microcantilevers with an interior fluidic channel through which cells flow. Cells traversing the interior fluidic channel transiently change the mass of the microcantilever, changing its resonant frequency, which we measure. Previously, it has only …
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MicroCantilever (MC) based nanomechanical sensor for detection of molecular interactions
… chemical or molecular binding on functionalized microcantilevers. Formation of affinity complexes on cantilever surfaces leads to charge redistribution, configurational change and steric hindrance between neighboring molecules resulting in surface stress change and measureable cantilever …
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Microcantilever Based Potentiometric Sensors For Harsh Environment Applications
… From bending experiments on the GaN microcantilevers the transverse gauge factor was found out to be -38 and -21 for dc and ac drain current measurements respectively. In addition, under ultra violet illumination the transverse gauge factor reduced to -13 indicating the presence of …
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Constructive utilization of intentional nonlinearity in systems of coupled micro/nanomechanical resonators
… at different sensing positions of the coupled microcantilevers, and attribute these shifts to nonpropertional damping effects. These same damping effects generate ‘splitting’ of resonance modes with decreasing coupling. In both applications our theoretical findings are validated by experimental …
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Development of high-Q micromechanical cell mass sensor (optimizing parameters for in-plane mass sensors)
There exists a strong correlation between the behavior of a cell, its physical properties, and its surrounding environment. Biomechanics has led to an improved understanding of the way diseases evolve and their progression cycle, providing methods targeted towards curing these diseases. Moreover, …
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