SEARCH · Engineering Papers
Results for “atomic force microscopy”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Structure and Dynamics of Dinucleosomes Assessed by Atomic Force Microscopy
Dynamics of nucleosomes and their interactions are important for understanding the mechanism of chromatin assembly. Internucleosomal interaction is required for the formation of higher-order chromatin structures. Although H1 histone is critically involved in the process of chromatin assembly, direct internucleosomal interactions contribute to this process as well. To characterize the interactions of nucleosomes within the nucleosome array, we designed a dinucleosome and performed direct AFM imaging. The analysis of the AFM data showed dinucleosomes are very dynamic systems, enabling the nucleosomes to move in a broad range along the DNA template. Di-nucleosomes in close proximity were observed, but their population was low. The use of the zwitterionic detergent, CHAPS, increased the dynamic range of the di-nucleosome, facilitating the formation of tight di-nucleosomes. The role of CHAPS and similar natural products in chromatin structure and dynamics is also discussed.
Subsurface Image Analysis of Plant Cell Wall with Atomic Force Microscopy
Explore the source record for details and available documents.
Atomic Force Microscopy Beyond the Standard Quantum Limit
We explore the impact of quantum noise reduction on force microscopy for broadband off-resonant materials characterization by integrating a multi-spatial-mode squeezed state as the readout field in a commercially available microscope.
Conclusions • Multimaterial and isotopically-labeled specimens were successfully fabricated via FFF-AM • Raman spectroscopy, atomic force microscopy, and neutron scattering show promise for direct measurements of interlayer diffusion in the multimaterial and isotopically-labeled specimens • Although isotopically-labeled specimens offer the greatest potential for experimentally verifying FFF-AM process models, substituting hydrogen with deuterium alters the thermal and rheological properties of the HDPE polymer
Multimaterial and Isotopically Labeled Specimen Fabrication via Material Extrusion Additive Manufacturing for Interlayer Diffusion Analysis
Quantitative Measurements of Surface and Subsurface Features with Quartz Tuning Fork Atomic Force Microscopy and Pump-Probe Optothermal Metrology
Explore the source record for details and available documents.
Preparation of Onion Epidermal Cell Walls for Imaging by Atomic Force Microscopy (AFM)
Explore the source record for details and available documents.
Integrating Carbon Nanotubes For Atomic Force Microscopy Imaging Applications
Carbon nanotube (CNT) related nanostructures possess remarkable electrical, mechanical, and thermal properties. To produce these nanostructures for real world applications, a large-scale controlled growth of carbon nanotubes is crucial for the integration and fabrication of nanodevices and nanosensors. We have taken the approach of integrating nanopatterning and nanomaterials synthesis with traditional silicon micro fabrication techniques. This integration requires a catalyst or nanomaterial protection scheme. In this paper, we report our recent work on fabricating wafer-scale carbon nanotube AFM cantilever probe tips. We will address the design and fabrication considerations in detail, and present the preliminary scanning probe test results. This work may serve as an example of rational design, fabrication, and integration of nanomaterials for advanced nanodevice and nanosensor applications.
Molecular-Resolution Atomic Force Microscopy Movies of Step Propragation around Surface Defects and Impurities
No abstract available
Final Report for Project titled "Chemical Infrared Spectroscopic Imaging with Nanometer Spatial Resolution Using Atomic Force Microscopy"
Explore the source record for details and available documents.
Photocatalytic Degradation of Bacteriophages Evidenced by Atomic Force Microscopy.
Abstract Not Provided
Mode synthesizing atomic force microscopy and mode-synthesizing sensing
A method of analyzing a sample that includes applying a first set of energies at a first set of frequencies to a sample and applying, simultaneously with the applying the first set of energies, a second set of energies at a second set of frequencies, wherein the first set of energies and the second set of energies form a multi-mode coupling. The method further includes detecting an effect of the multi-mode coupling.
Measurement of elastic properties of calcium silicate hydrate with atomic force microscopy.
Abstract not provided.
Nanoscale in-situ atomic force microscopy studies of surface stability in LiMn2O4.
Abstract not provided.
Extracting Viscoelastic Properties of Nanometric Phases using Atomic Force Microscopy.
Abstract not provided.
In-situ atomic force microscopy study of surface microstructure stability on LiMn2O4 thin films.
Abstract not provided.
Mode-synthesizing atomic force microscopy and mode-synthesizing sensing
A method of analyzing a sample that includes applying a first set of energies at a first set of frequencies to a sample and applying, simultaneously with the applying the first set of energies, a second set of energies at a second set of frequencies, wherein the first set of energies and the second set of energies form a multi-mode coupling. The method further includes detecting an effect of the multi-mode coupling.
Functional material properties of oxide thin films probed by atomic force microscopy on the nanoscale
Explore the source record for details and available documents.