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 183 for “"microscopes"”.
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Innovation in electron microscopes and accessories
Thesis. 1975. M.S.--Massachusetts Institute of Technology. Alfred P. Sloan School of Management.
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Design of multi-channel spectrometers for scanning ion/electron microscopes
The potential advantages of multi-channel analysers over conventional sequential detection are well known and are active areas of research both for electron energy spectroscopy and ion mass spectroscopy. Their inherent advantage of capturing the entire spectrum in parallel, promises at least an …
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Computer-aided-design of saturated magnetic lenses for electron microscopes
… objective lenses in high resolution electron microscopes. Such lenses, in present commercial electron microscopes, are energized either by conventional or superconducting coils. Very little work, however, has been reported on the use of conventional coils in saturated magnetic electron lenses. …
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Modeling and control of undesirable dynamics in atomic force microscopes
The phenomenal resolution and versatility of the atomic force microscope (AFM), has made it a widely-used instrument in nanotechnology. In this thesis, a detailed model of AFM dynamics has been developed. It includes a new model for the piezoelectric scanner coupled longitudinal and lateral …
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A new dynamic mode for fast imaging in atomic force microscopes
Video-rate imaging and property sensing with nanoscale precision is a subject of immense interest to scientists because it facilitates a deep understanding of processes and sample properties at a molecular level. This dissertation addresses the challenges of high-bandwidth imaging and real-time …
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Design and Control of Versatile High-Speed and Large-Range Atomic Force Microscopes
Microscopy instruments are important in nano-technology research for imaging of nanoscale phenomena. Among such tools is the atomic force microscope (AFM) for nanoscale imaging and surface characterization. An AFM scans a micro-cantilever over the sample surface to measure various quantities from …
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Mathematical Challenges in Electron Microscopy
Development of electron microscopes first started nearly 100 years ago and they are now a mature imaging modality with many applications and vast potential for the future. The principal feature of electron microscopes is their resolution; they can be up to 1000 times more powerful than a visible …
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Drift correction for scanning-electron microscopy
… on scanning electron and other scanned-beam microscopes by registering a series of images to create a drift-free composite. We develop a drift-distortion model for linear drift and use it as a basis for an affine correction between images in the sequence. The performance of our correction …
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A single-site resolution fermionic quantum-gas microscope
Quantum-gas microscopes have become an important tool in quantum simulation as they enable direct probing of local quantities by single-atom-resolved detection in optical lattices. Recent years have seen many fascinating results from the bosonic quantum-gas microscopes using 87Rb. However, no such …
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Studying Electronic Textures with Coherent Lensless Imaging
X-ray microscopes have opened our collective eyes to the richness of nanoscale texture in systems such as correlated and quantum materials. These microscopes draw their power from the combination of short wavelengths, which provide high resolution, and interaction with atomic resonances, which …
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Interfacing Nanomaterials With Fluids and Living Biological Systems
… rooted in solid-state physics, such as electron microscopes, scanning probe microscopes, and microfabricated testing devices; thus, the tools and methods were difficult to incorporate "soft" materials, rooted in chemistry and biology, into the studies. Despite enormous potential of technologies …
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Quantum Computation and Simulation using Fermion Pair Registers
Quantum gas microscopes provide a powerful toolbox for probing quantum many-body physics. Recently, an exciting progress has been reported on realizing a large-scale quantum register of fermion pairs with a quantum gas microscope, in which tightly localized fermion pairs are used to encode qubits …
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Imaging and controlling atoms and semiconductor spins with advanced optical microscopy
… However, conventional capabilities of optical microscopes often limit advances of quantum science and technologies that are based on atoms and atom-like semiconductor spins. In this thesis, I present new approaches to extend such optical microscopes' capabilities for advanced optical imaging …
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In Vitro Long Term Time-Lapse Imaging Studies Of The Mcf-10 Mammary Cancer Cell Progression Model Using A Custom Incubator Microscope
… and communication between the computer and the microscopes. I placed special emphasis on giving the microscopes the capability to perform fluorescent imaging because fluorescence has become the workhorse of molecular studies in cell biology in recent times. My primary use of the microscopes that …
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Cell death and Pro-inflammatory Cytokine Release of Rat Microglial Cells by Naegleria fowleri
… by a light, scanning and transmission electron microscopes. And then, the cytotoxicity of N. fowleri lysate against rat microglial cells was also observed by (51)^Cr release assay. In addition, the pro-inflammatory cytokine release from microglial cells in co-culture system was estimated. As …
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Asymptotic description of the acoustic microscopy of a surface-breaking crack
… integrals. Because the lenses of the acoustic microscopes are characterized by a large Fresnel number and a F-number of order one, the Fourier integrals can be asymptotically approximated to obtain explicit expressions for the incident wavefield and the wavefield scattered from a defect-free …
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Scanning standing-wave illumination microscopy : a path to nanometer resolution in X-ray microscopy
… that of electron microscopy. In theory, x-ray microscopes can image unsectioned hydrated cells with nanometer resolution. In practice, however, the resolution of x-ray microscopes is limited to approximately 20 nm due to difficulties in the construction of high numerical-aperture (NA) x-ray …
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Quantum Gas Microscopy of Bosonic Correlations in the Continuum
… microscope for ultracold 87Rb atoms. Quantum gas microscopes enable site-resolved imaging, providing unprecedented access to quantum statistical effects and many-body phenomena. While such instruments are often employed to study physics in optical lattices, we have innovatively adapted our …
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