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Showing 1 to 20 of 33 for “"nanomechanics"”.
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Nanomechanics model for static equilibrium
… and SWNTs. The proposed technique for nanomechanics can be used for design and analysis of materials at the atomic or molecular level.
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Nanomechanics of Glassy Polymers Under Confinement
Many of today's nanotechnologies and processes rely on highly confined ($<30$ nm) polymer glasses and polymer nanocomposites. These materials have aided the development of smaller and faster computer chips, improved energy storage devices, protective coatings, and next generation materials with …
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Nanomechanics of cartilage extracellular matrix macromolecules
… II collagen network was measured. Aggrecan shear nanomechanics was assessed via microcontact printing and lateral force microscopy. Lateral force between aggrecan and the probe tip, and compression of aggrecan was simultaneously measured in 0.001 - 1.0 M NaCl aqueous solutions. Using the …
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Measuring The Nanomechanics Of Nanoconfined Water Layers
<p>Nanoconfined water has been the subject of special interest due to its applications in various fields such as biology, geology, medicine, and engineering tribology. While there is a general agreement on the layering of water molecules along atomically smooth surfaces, the behavior and properties …
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Indentation and nanomechanics of graphene-substrate interfaces
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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The nanomechanics of polycystin-1: A kidney mechanosensor
Mutations in polycystin-1 (PC1) can cause Autosomal Dominant Polycystic Kidney Disease (ADPKD), which is a leading cause of renal failure. The available evidence suggests that PC1 acts as a mechanosensor, receiving signals from the primary cilia, neighboring cells, and extracellular matrix. PC1 is …
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Nanomechanics of cartilage at the matrix and molecular levels
Cartilage, as well as many soft connective tissues, functions mechanically across a wide spectrum of daily loading frequencies (time scales), from <1 Hz in slow activities such as walking, to 1000 Hz for high-rate activities such as jumping and impact sports. A major mechanism underlying the …
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Fracture process zone : microstructure and nanomechanics in quasi-brittle materials
… the two marble types, validation of the use of nanomechanics as a tool for identifying damage in quasi-brittle materials, and a quantitative assessment of the role of grain size in the damage of quasi-brittle materials.
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The Nanomechanics of Protocadherin 15, A Protein Essential for Human Hearing
<p>Mechanical force controls the opening and closing of mechanotransductive ion channels atop the hair bundles in the inner ear. A mechanical element called the gating spring modulates the mechanotransduction channel's open probability by changing the force transmitted to the channels. The …
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Novel Fluorous Hybrid Surface Modification Characterized by Wetting Dynamics, Morphology and Nanomechanics
<p>The surface response of a polymer substrate to external stimuli such as initial wetting is controlled by the outermost molecular layer. Thus, changes on the nanoscale may be engaged to control macroscale wetting behavior. Our work has predominantly focused on surface modification of conventional …
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Nanoscale influences on bioactivity : ultrastructure and nanomechanics of model bioactive hydroxyapatite based biomaterials
There is a significant need for improved synthetic materials as orthopedic implants to replace human bone lost and damaged due to disease or injury. Certain ceramics, such as hydroxyapatite (HA), have the special property of being bioactive, meaning that an interfacial bond between the implant and …
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Probing nanomechanics of aggrecan and the aggrecan-rich pericellular matrix of chondrocytes in cartilage
The mechanical properties of articular cartilage are associated with the extracellular matrix network of type II collagen and the proteoglycan, aggrecan, which in combination provide the tensile, shear, and compressive stiffness of the tissue. While the collagen network mainly provides resistance …
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Characterizing Plastic Deformation Mechanisms in Metal Thin Films using In Situ Transmission Electron Microscopy Nanomechanics
The demand for smaller, smarter and faster devices has motivated continued research into understanding the mechanical behavior of small-scale materials used to create micron-sized features for devices such as flexible or stretchable electronics or micro electromechanical systems (MEMS). …
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MODELING OF INTERFACE STRENGTH AS WELL AS INTERFACE DEFORMATION BASED ON NANOMECHANICS AND DEVELOPMENT OF INTERFACE DATABASE SYSTEMS
Biomaterials such as bone and marine exoskeletons have primarily an organic phase (e.g. tropocollagen in bone, chitin in exoskeleton) and an inorganic phase (e.g. hydroxyapatite in bone, calcite in exoskeleton) arranged in a precisely organized multi-level hierarchical arrangement. Interfacial …
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Nanotribology and Nanomechanics Including Nanomechanical Properties, Adhesion and Surface Roughness With Application to Magnetic Storage Hard Disk Drives
In the second part of this work, a systematic approach considering the above basic elements was used to investigate impact-induced contact damage of Head Disk Interfaces during operational shock. A contact mechanics based analysis with consideration of mechanical properties and thickness of various …
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Developments in Extended Finite Element Methods for Extraction of Strain Energy Release Rates and Computational Nanomechanics for SWCNT Aggregates
In the first part, a new analytical approach, within the extended finite element (XFEM) framework, is proposed to compute Strain Energy Release Rates (SERRs) directly from Irwin's integral. Crack tip enrichment functions in XFEM allow for evaluation of integral quantities in closed form (for some …
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Nanomechanics and ultrastructural studies of cortical bone : fundamental insights regarding structure-function, mineral-organic force mechanics interactions, and heterogeneity
Although the mechanics of bone has been studied extensively at the micro- and macro-scale, the nano-scopic level is perhaps the most illuminating as this is the length scale at which the individual constituents interact. Bone is made primarily up of type I collagen, hydroxyapatite mineral, a …
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Multi-Functional nano-structures in Nature: from optics to mechanics
… nanostructures. My comparisons on spectra and nanomechanics of helicoidally arranged cellulose microfibrils in the cell walls of Pollia condensata fruits shed light on the origin of the chirality assembling in the plant cell walls. By studying the structural colours developed in the close …
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A Multiscale Method for Simulating Fracture in Polycrystalline Metals
The emerging field of nanomechanics is providing a new focus in the study of the mechanics of materials, particularly in simulating fundamental atomic mechanisms involved in the initiation and evolution of damage. Simulating fundamental material processes using first principles in physics strongly …
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