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Showing 1 to 20 of 68 for “"Nanomechanical"”.
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Nanomechanical characterization of asphalt
In this study, asphalt binder and asphalt concrete (AC) materials are characterized using laboratory nanoindentation testing and mechanical models. Traditionally, laboratory nanoindentation test data is analyzed using the Oliver-Pharr method to determine elastic modulus and hardness of materials. …
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Nanomechanical coupling of mechanomutable polyelectrolytes
Nanotechnology has advanced to the point where almost any molecular functional group can be introduced into a composite material system. However, emergent properties attained via the combination of arbitrary components - e.g., the complexation of two weak polyelectrolytes - is not yet predictive, …
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Nanomechanical systems with small dissipation
… in small mechanical systems, specifically nanomechanical resonators with at least one dimension in the deep nanometer range (< 200 nm). We explored three avenues for decreasing intrinsic dissipation and one method for decreasing non-contact friction. The three routes toward lower intrinsic …
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Viscoelastic and nanomechanical behaviors of polymeric materials
… method recently widely used to characterize the nanomechanical properties of materials is nanoindentation technique. For nanoindentation of polymers, in order to obtain precise results, the sample surface needs to be accurately determined. In this work, we are able to show that the reported …
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Nanomechanical properties of hydrated organic thin films
Hydrated organic thin films are biological or synthetic molecularly thin coatings which impart a particular functionality to an underlying substrate and which have discrete water molecules associated with them. Such films exist in biology (e.g. cell membrane lipid bilayers) and have a broad array …
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Nanoelectronic and nanomechanical devices for low temperature applications
… and analysis methods to demonstrate the use of nanomechanical resonators, which for the first time were used to probe both the normal and the superfluid phases of helium-4. The doubly clamped beams had a cross section of 100nm by 100nm and were tested in length variants between 15um to 50um, The …
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Nanomechanical Properties of Polymer-Grafted Nanoparticle Ultrathin Films
Polymer thin films have recently become one of the most emerging research areas due to their profuse applications in energy storage, flexible electronics, and photonics. The mechanical response of polymer thin films is crucial in defining a high-performance device encompassing the film’s …
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The mode-dependent dynamics of nonlinear nanomechanical resonators
… access this regime experimentally with current nanomechanical systems, we motivate an experimental "synthetic noise" to approximate the Brownian force in the proximity of a single mode. As a measure of drive magnitude, we vary an effective temperature to explore the linear and nonlinear …
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Rheological and nanomechanical characterization of aging in polymer modified asphalt
In this study, change in rheological and nanomechanical properties of asphalt due to aging is determined in the laboratory. Asphalt binders are aged using Rolling Thin Film Oven (RTFO), Pressure Aging Vessel (PAV), and draft ovens. Asphalt binder includes an unmodified base binder, …
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MUC13 Modulated Nanomechanical and Biophysical Responses in Pancreatic Cancer Cells
… is to investigate if MUC13 expression influences nanomechanical and biophysical characteristics of pancreatic cancer cells that might contribute to aggressive nature of this disease. To achieve this goal, we performed innovative nanoindentation analyses using atomic force microscopy in conjunction …
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MicroCantilever (MC) based nanomechanical sensor for detection of molecular interactions
<p>Specific aims of this study are to investigate the mechanism governing surface stress generation associated with chemical or molecular binding on functionalized microcantilevers. Formation of affinity complexes on cantilever surfaces leads to charge redistribution, configurational change and …
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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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Nanomechanical studies of metallic glasses at ambient and elevated temperatures
… a focused, high-resolution method for probing nanomechanical behavior. A nanoindenter capable of sub-nanometer and sub-microNewton resolution was outfitted with a custom heating stage and installed in a controlled atmosphere chamber to allow for high fidelity testing in a non-oxidizing …
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Spatial and temporal estimation of nanomechanical properties via Atomic Force Microscopy
… We develop a strategy wherein topography and nanomechanical properties can be simultaneously mapped out to obtain a 3D visualization of a surface at sub micrometer resolutions. A diverse set of applications ranging from polymeric surfaces to protein assembly are studied using this method. In …
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DIMENSIONALITY REDUCTION OF 2D MATERIALS: NANODEVICES AND IN-SITU NANOMECHANICAL ANALYSIS
Two-dimensional (2D) materials are inherently soft and can undergo morphological changes, such as from nanosheets to one-dimensional (1D) nanoscrolls at certain conditions. This thesis is focused on the investigation of nanoscrolls formed at different circumstances: (i) by means of chemical …
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A nanomechanical investigation of the crack tip process zone of marble
… the interaction between crack initiation and nanomechanical properties in the crack tip process zone (zone of microcracking at the tip of a propagating crack) of a brittle geomaterial. Samples of Carrara marble with pre-existing cracks ("flaws") were loaded in a uniaxial testing machine until …
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Nanomechanical Properties and Nanowear Characterization of Thin Solid Films and Engineering Surfaces
"Reliable nanomechanical property and nanowear measurements have recently drawn significant attention, as thin solid films have been routinely used in various applications, such as semiconductor, magnetic storage and microelectromechanical systems, and their thickness has shrunk from as low as a …
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Constructive utilization of intentional nonlinearity in systems of coupled micro/nanomechanical resonators
Micro/nanomechanical resonators have been actively studied in the last decade in designs of highly sensitive detection, high frequency signal-processing, and high speed switching. These designs benefit from the exceptional dynamic characteristics of these systems, i.e., high frequency resonance and …
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Nanomechanical Analysis of Coronavirus Spike proteins and Correlation with Infectivity and Lethality
… of coronavirus spike proteins, connecting their nanomechanical features – specifically the vibrational spectrum and quantitative measures of mobility – with virus lethality and infection rate. The key result of our work is that both, the overall flexibility of upward RBD and the mobility ratio of …
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