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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 416 for “"atomic force microscopy (AFM)"”.
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Nanomechanical viscoelastic characterization of rubber with atomic force microscopy (AFM)
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms
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Surfactant Adsorption during Collisions of Colloidal Particles: A Study with Atomic Force Microscopy (AFM)
… solutions. A Maxwell relation is applied to Atomic Force Microscopy (AFM) data to obtain changes in surfactant adsorption as a function of the separation between two glass surfaces. In addition, self-consistent field theory (SCF) is used to calculate the adsorption profiles and interaction …
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Intentional nonlinearity in the small scale with applications to atomic force microscopy (AFM) and mass sensing
… biological, chemical and inertial sensing; atomic force microscopy and infrared spectroscopy; and precise time keeping and synchronization. Traditionally, these systems were studied within the framework of linear dynamics, and incidental nonlinearity was suppressed by design. More recently, …
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CHARACTERIZING THE MICRO-SCALE MECHANICAL PROPERTIES OF HYDROGELS AND CANCER CELLS
… glycol diacrylate (PEGDA), were tested with atomic force microscopy (AFM). We also determined the Young’s modulus (E) of hydrogels with different concentrations. E tended to increase with increased concentration.
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Molecular Crystallization Directed By Nanoparticles And Nanopatterns
… size, curvature and separation distance. Atomic force microscopy (AFM) is the main characterization tool to investigate the topography of the hybrid nanostructures and the nucleation and crystallization process. This work will contribute to the understanding of seed mediated nucleation and …
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Mechanics and manufacturing of crosslinked cellulose nanocomposites
… CNC composites by nanoindentation and bi-modal atomic force microscopy (AFM) reveals a nanoscale grain structure and fracture toughening mechanism.
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Amphiphile Polyurethan-Makromere als Emulgatoren und Comonomere für die heterophasige Polymerisation hydrophober Monomere
… durch Festkörper-NMR modelliert werden. Durch Atomic Force Microscopy (AFM) im Tapping mode konnte die Oberfläche und die Phasenseparation der polymeren Phasen charakterisiert werden.
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Alignment and characterization of carbon nanotubes of photolithographically patterned electrodes
… The suspended SWNTs are then characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM), and Raman spectroscopy. Finally, the information on the diameter distribution and the energy of the electronic transitions of the resonant suspended SWNTs obtained from Raman …
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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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STUDYING THE INTERACTION OF CANCER AND THROMBOSIS THERAPEUTICS WITH PROTEIN AND DNA
In my dissertation research I have used atomic force microscopy (AFM), simulations and molecular biology to investigate different classes of therapeutics. Many cancer drugs bind to DNA and inhibit replication. We have AFM and simulations, based on the worm-like chain model (WLC), to study DNA …
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Formation, structure, and reproducibility of cerato-ulmin hydrophobin-coated bubbles
… of 15 nm, the equivalent of 5 CU proteins. Atomic force microscopy (AFM) of collapsed microbubbles has the same film thickness suggesting that film thickness is independent of CU bubble size. To isolate singular bubble sizes during agitation, a new experimental apparatus was designed and …
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The Synthesis and Study of Dendrimers and Star Polymers Without Cores
… of the dendrimer having 64 alkene groups, atomic force microscopy (AFM) data indicated that as the degree of cross-linking increased, the height of the resulting structure deposited on a mica surface increased linearly. These results were interpreted in terms of an increase in rigidity with …
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On advancement of high speed atomic force microscope technology
High speed atomic force microscopy (AFM) is a developing process in which nanoscale objects, such as crystal structures or strands of DNA, can be imaged at rates fast enough to watch processes as they occur. Although current generation AFM is already pivotal in many fields of research and industry, …
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Topographically and Mechanically Tunable PNIPAM Scaffolds
… changes in the PNIPAM hydration states using atomic force microscopy (AFM). AFM measurements on our lithographically patterned substrates show that the substrate pattern and coating method enable the fabrication of scaffolds with different topographic and mechanical properties across a wide …
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STM Studies of Oxygen Etching of Silicon Surfaces
This study uses atomic force microscopy (AFM) to investigate the oxygen etching behavior of the following silicon surface orientations: (001), (111), (113), (5 5 12) and (112). Most etching was performed at sample temperatures between 650 °C and 800 °C, at pressures of 3.3×10-7 and 1.5×10-7 Torr, …
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A Study on the Nature of Anomalous Current Conduction in Gallium Nitride
… measurements on NiIAu Schottky diodes and CAFM. Current-voltage (IV) mechanisms will identify conduction mechanisms on diodes, and CAFM measurements will investigate the microstructure of conduction in GaN thin films. With CAFM, enhanced conduction has been shown to decorate some extended …
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IR Spectroscopy Study of silver and Copper Nano-films
… morphology of the films was examined ex situ by atomic force microscopy (AFM). For the first time, an infrared reflectance minimum was found during the metal film growth. The infrared optical properties of some films can be described by the Drude-type model or the Effective Medium Model. The Ag …
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Probing nanomechanics of aggrecan and the aggrecan-rich pericellular matrix of chondrocytes in cartilage
… of tissue age, disease, and species. Using atomic force microscopy (AFM), we directly visualized the nanometer scale structure of aggrecan deposited on a 2-D substrate, including the first high resolution imaging of individual GAG chains along the core protein. We also visualized and …
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Design and simulation of a rapid high percision profilometer
… Based on system specifications and requirements, atomic force microscopy (AFM) was determined to be the most appropriate profilometry technique. The major components of the device include: (1) A commercially available auto-sensing AFM probe, (2) custom designed probe positioning hardware, (3) …
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Custom built atomic force microscope for nitrogen-vacancy diamond magnetometry
… probes by combining this sensor with Atomic Force Microscopy (AFM) is described. A custom AFM was built that allows optical monitoring of the cantilever tip and collection of fluorescence with a high-NA objective from the same side. The AFM has a large open bottom and top and thus …
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