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 903 for “"force microscopy"”.
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Molecular assemblies observed by atomic force microscopy
… collagen fibers imaged by transmission electron microscopy. Secondly, a covalent assembly approach to prepare membrane protein for AFM imaging that avoids crystallization was proposed. High-resolution AFM topographs can reveal structural details of single membrane proteins but, as a prerequisite, …
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Force microscopy of self-assembled amphiphilic films
Scanning force microscopy is a powerful technique to study surfaces in vacuum, air or liquids because of its nanometer spatial resolution and piconewton force resolution. The work presented here uses colloidal (steric and double layer) forces to investigate the shape of surfactant micelles on an …
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Image processing for precision atomic force microscopy
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Accurate capacitive metrology for atomic force microscopy
… metrology designed for a prototype atomic force microscope (AFM) originally developed in the MIT Precision Motion Control Lab. The capacitive measurements use a set of commercial capacitance sensors intended primarily for use against a flat target. In our design, the capacitance sensors are …
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Nanocharacterization of Porous Materials with Atomic Force Microscopy
<p><em>Scanning Probe Microscopy techniques have proven very useful in the investigation of porous nanostructured surfaces. Especially, Atomic Force Microscopy (AFM) has been widely used due to its compatibility with non-conducting surfaces. In particular, AFM often complements other techniques …
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Feasibility of Single-Point Excitation Ultrasonic Force Microscopy
<p>We propose Multi-Probe Ultrasonic Force Microscopy (UFM) to create and detect the motion of tip-induced surface waves and thereby study nanoscale surface dynamics. Before committing to the construction of an instrument, we investigate the theoretical feasibility of such a novel instrument to …
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Magnetic force microscopy studies of mesoscopic superconducting structures
… dissertation describes a new mode of magnetic force microscopy (Φ0-MFM) for investigating vortex and fluxoid sates in mesoscopic superconducting (SC) structures. The technique relies on the magneto-mechanical coupling of a MFM cantilever to the motion of fluxons. The novelty of the technique is …
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Study of current measurement in magnetic force microscopy
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Atomic Force Microscopy Study of Clay Mineral Dissolution
… respect to acid dissolution using in situ atomic force microscopy (AFM). Three techniques are described which make it possible to fix these minerals and other small particles to a suitable substrate for examination in the fluid cell of the atomic force microscope. A suite of macros has also been …
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Investigating Cell Viscoelastic Properties with Nanonet Force Microscopy
… several methods, including modified atomic force microscopy (AFM) and micro-pipette aspiration have been developed to measure cellular viscoelastic properties at single-cell resolution. We inquired if the fibrous environment affected cellular mechanobiology. Using our non-electrospinning …
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Nonlinear Dynamics of Tapping Mode Atomic Force Microscopy
… the grazing dynamics of tapping mode atomic force microscopes (AFM) subjected to a base harmonic excitation. The nonlinear dynamics of the AFM microcantilever are studied in both of the monostable and bistable phases with the microcantilever tip being, respectively, located in the monostable …
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Novel probe structures for high-speed atomic force microscopy
Atomic Force Microscopy (AFM) has become an indispensable metrology tool for nanoscale surface characterization. Today, research and industry demand faster and more accurate metrology and these demands must be met expediently. Traditional AFM cantilevers and associated actuators (i.e. …
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Cantilever Dynamic Analysis in Tapping Mode Atomic Force Microscopy
Tapping mode atomic force microscopy (AFM) is becoming popular in the area of biology, as well as for polymer and semiconductor materials science. Unlike other AFM techniques, it only makes intermittent contact with the sample, which largely reduces any potential surface damage to soft materials, …
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Dynamic Atomic Force Microscopy and applications in biomolecular imaging
The Atomic Force Microscope (AFM) is a key member of the Scanning Probe Microscope (SPM) family. Its versatility allows it to image and manipulate nanoscale features with high precision, making it one of the main instruments in nanotechnology for surface characterization. The aim of this thesis is …
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Investigation of protein-protein interaction using atomic force microscopy
… </p> <p>In our laboratories, we use the force spectroscopy (FS) technique to study protein binding and dissociation. FS measures the strength of the protein molecules bond with high resolution down to pico-Newton either on the surface of solid substrate or the membrane of living cells. …
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Atomic force microscopy methods to study protein phase transitions
… associated with protein phase changes via atomic force microscopy, infrared spectroscopy, and other biophysical techniques. AFM is a powerful surface-based technique which can provide nanometre-resolved morphological and mechanical information on protein aggregates. As such, it is capable of …
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Investigation of Ferroelectric Thin Film Using Piezoresponse Force Microscopy
… on this topic, resonance enhanced piezoresponse force microscopy was introduced and theoretical models were developed to support quantitative imaging with PFM. The resonant PFM mechanism was thoroughly investigated, and functional materials including tetragonal polycrystalline PbZr0.3Ti0.7O3 and …
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The study of organic crystals by atomic force microscopy
… and its immediate environment. While atomic force microscopy (AFM) is a useful tool for studying surfaces, it is not a common technique for studying organic crystals. The rst part of this report aims to address problems of imaging organic crystals by AFM which arise from the nature of the …
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Theoretical and Experimental Atomic Force Microscopy Investigations of Staphylococcus aureus
… serotype 5 or 8 capsular polysaccharides. Atomic force microscopy (AFM) was used to investigate three serotypically different S. aureus strains, two of which express capsular polysaccharides, in air and phosphate buffered saline. Adhesion and compliance were determined through normal force …
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