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 76 for “"scanning probe microscopy"”.
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Microfabrication of silicon tips for scanning probe microscopy
… the microfabrication of silicon tips for Scanning Probe Microscopy. First, a microfabrication process was developed to produce silicon tips over 100 um height with a sharp apex of ~10–20 nm. To prevent inadvertent contact between the substrate bearing the tip and the sample being probed, …
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Scanning Probe Microscopy of Biomaterials and Nanoscale Biomechanics
… and using a nanoneedle attached to the AFM probe as the sensing element in liquid. It was shown that this method in liquid maintained the harmonic dynamic characteristics of the cantilever similar to that in air and had an intrinsic high quality factor. The performance of the new method is …
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Scanning Probe Microscopy of Biomaterials and Nanoscale Biomechanics
… performance of bone. Using piezoresposne force microscopy (PFM), the electromechanical properties of a collagen fibril was probed and it was revealed that a single collagen fibril behaves predominantly as a shear piezoelectric material, and has unipolar axial polarization throughout its entire …
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Scanning probe microscopy study of thin film solar cells
… thin film solar cells have been studied by using scanning probe microscopy based techniques. The scanning spreading resistance microscopy (SSRM) has been developed on the cross-section of CdTe solar cells to study the resistance and carrier concentration distribution in different layers of the …
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Scanning probe microscopy with inherent disturbance suppression using micromechanical systems
All scanning probe microscopes (SPMs) are affected by disturbances, or mechanical noise, in their environments which can limit their imaging resolution. This thesis introduces a general approach for suppressing out-of-plane disturbances that is applicable to non-contact and intermittent contact SPM …
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Scanning Probe Microscopy Study of Molecular Nanostructures on 2D Materials
… and chemical properties. This thesis presents scanning probe microscopy (SPM) investigation of emerging 2D materials, molecular nanostructures on 2D substrates at the nanometer scale, and biophysical processes on the biological membrane. Two main techniques of nano-probing are used: scanning …
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Investigation of van der Waals ferroelectric CuInP2S6 by scanning probe microscopy
… of the response to external fields. Scanning probe microscopy (SPM) can measure and collect rich multi-dimensional information and has become a powerful tool for the characterization of micro-nanoscale materials. Ferroelectric materials play an important role in non-volatile memory …
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Control-systems based analysis and design methods for scanning probe microscopy
… A class of devices, with micro-sized sensor probes, called Scanning Probe Microscopes (SPMs) are in the forefront of the technology that have demonstrated imaging and manipulation of sample properties. However, this technology is still far from realizing the promise of routinely tailoring …
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Surface studies of organic thin films using scanning probe microscopy and nanofabrication
… and nanocrystals on surfaces. Conductive-probe atomic force microscopy (CP-AFM) has been used extensively for studies of alkanes, phenylalkanes and arenethiols; however, the conductive properties of porphyrins have not been studied as rigorously. Characterizations with CP-AFM are becoming …
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Scanning Probe Microscopy Studies of Dissolution and Deposition Processes on Electrode Surfaces
Embargo set by: Seth Robbins for item 72445 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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Application of field programmable analog arrays (FPAAs) to fast scanning probe microscopy
For a long time, signal processing used to be accomplished by microprocessors and DSPs (Digital Signal Processors). The advent of reconfigurable computing devices, such as Complex Programmable Logic Devices (CPLDs) and Field Programmable Gate Arrays (FPGAs) has given a new dimension to signal …
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Probing Nanoscale Functional Properties of Perovskite and Wurtzite Ferroelectrics via Scanning Probe Microscopy
Scanning probe microscopy (SPM) is considered essential for visualizing, analyzing, controlling, and engineering novel functional attributes of nanoscale materials. Diverse SPM-based methodologies were employed to investigate the topography, ferroelectricity and conductivity of perovskite and …
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Nanomechanical and nanoelectromechanical phenomena in 2D-atomic crystals : a scanning probe microscopy approach
In this thesis we probe the morphological, nanomechanical and nanoelectromechanical properties of 2D materials: graphene, MoS2 and h-BN. Throughout this study we extensively use scanning probe techniques of ultrasonic force microscopy (UFM), direct-contact electrostatic force microscopy (DC-EFM) …
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Interfacial Properties of Graphene and 2D Materials Heterostructures Investigated by Scanning Probe Microscopy
… </p><p>In this dissertation, advanced scanning probe microscopy (SPM) techniques, including contact resonance atomic force microscopy (CR-AFM) and piezoresponse force microscopy (PFM), are applied to study the interfacial mechanical and piezoelectrical properties of graphene and 2D …
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Fabrication of Tungsten Tips Suitable for Scanning Probe Microscopy by Electrochemical Etching Methods
… the surface of materials play a key role in the scanning tunneling microscope (STM) technique. It's remarkable quality that it is used to study the surface of material at the atomic level.</p> <p>There are various methods used in the tips fabrication process. Of diverse methods, three different …
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Investigation of electrical, optical and mechanical control of ferroelectric domains using scanning probe microscopy
… light-dependent nanoscale investigations using scanning probe microscopy. The light is found to work analogous to an applied electric field and the charge carriers generated by the presence of light are found to be compensated by the movement of ferroelectric domains. The domain wall velocities …
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Thermally driven visco-elastic measurement technique via spectral variations in scanning probe microscopy cantilevers
… and data related to the performance of SPM probes in a fluid environment, the AFM is an attractive platform to exploit. This thesis will discuss the use of thermal oscillations of an SPM probe to quantify the visco-elastic properties of fluids via spectral variations. There exist theoretical …
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Scanning Probe Microscopy Study of Molecular Self Assembly Behavior on Graphene Two-dimensional Material
… 2D material by the experimental methods of scanning tunneling microscope (STM) and atomic force microscope (AFM) and by the theoretical method of density functional theory (DFT). We found that molecules form ordered structures on flat graphene, while they form disordered structure on rippled …
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