Results 61 to 70 of about 2,010 (256)

Substrate Stress Relaxation Regulates Cell‐Mediated Assembly of Extracellular Matrix

open access: yesAdvanced Functional Materials, EarlyView.
Silicone‐based viscoelastic substrates with tunable stress relaxation reveal how matrix mechanics regulates cellular mechanosensing and cell‐mediated matrix remodelling in the stiff regime. High stress relaxation promotes assembly of fibronectin fibril‐like structures, increased nuclear localization of YAP and formation of β1 integrin‐enriched ...
Jonah L. Voigt   +2 more
wiley   +1 more source

Applying the fractional derivative Zener model to fitting the time-dependent material viscoelasticity tested by nanoindentation

open access: yesBiosurface and Biotribology, 2018
Material viscoelasticity is of particular importance for polymers, biotissues and many others, due to the significant influence not only on the elastic response of structures, but also on their failure mechanism in actual applications. In this study, the
Long Fei Wei   +3 more
doaj   +1 more source

Study of Nanoidentation and Tip Geometry in GAAS (100) at Ultra-Low-Loads for the Patterning of Quantum Dots [PDF]

open access: yes, 2003
In this study, nanoindentations were produced and characterized for the future patterning of quantum dots. Nanoindentation was performed on a Si-doped (n-type) Vertical Gradient Freeze (VGF) GaAs (100) wafer with a 700 nm GaAs (100) layer grown by ...
Prince, Robin
core   +1 more source

Conventional Vickers and true instrumented indentation hardness determined by instrumented indentation tests [PDF]

open access: yes, 2010
We evaluate Vickers hardness and true instrumented indentation test (IIT) hardness of 24 metals over a wide range of mechanical properties using just IIT parameters by taking into account the real contact morphology beneath the Vickers indenter ...
Bulychev   +6 more
core   +1 more source

Toughening β‐Ga2O3 via Mechanically Seeded Dislocations

open access: yesAdvanced Functional Materials, EarlyView.
β‐Ga2O3 is promising for next‐generation semiconductors but its brittleness limits flexible and high‐precision applications. Here, mechanically seeded dislocations introduced by surface deformation improved damage tolerance in (001) β‐Ga2O3. Nanoindentation and characterization show dislocations suppress cleavage cracks by enabling stable plastic ...
Zanlin Cheng   +5 more
wiley   +1 more source

Fracturas en madera de Eucalyptus nitens: Efecto de las propiedades mecánicas a nivel ultraestructural y de la anatomía celular

open access: yesMaderas: Ciencia y Tecnología, 2014
Se realizó un estudio para indagar en las causas y posibles factores que originan la fractura en la estructura de la madera de Eucalyptus nitens. Para esto se examinó el comportamiento nanomecánico de la lamela media (LM), de las capas S1 y S2 de la ...
Paulina Valenzuela   +3 more
doaj  

Compression Stress Effect on Dislocations Movement and Crack propagation in Cubic Crystal [PDF]

open access: yes, 2011
Fracture material is seriously problem in daily life, and it has connection with mechanical properties itself. The mechanical properties is belief depend on dislocation movement and crack propagation in the crystal.
Aprilia, Ely, Suprijadi, Yusfi, Meiqorry
core   +2 more sources

A single point mutation in precursor protein VI doubles the mechanical strength of human adenovirus [PDF]

open access: yes, 2017
Viruses are extensively studied as vectors for vaccine applications and gene therapies. For these applications, understanding the material properties of viruses is crucial for creating optimal functionality.
Nemerow, Glen R   +3 more
core   +2 more sources

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

open access: yesAdvanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero   +12 more
wiley   +1 more source

Caracterización nanomecánica de la estructura celular y anatómica de Eucalyptus nitens y su relación con la frecuencia de grietas y rajaduras en madera redonda

open access: yesMaderas: Ciencia y Tecnología, 2014
El objetivo de este trabajo fue localizar el mínimo volumen en árboles de E. nitens que caracterice el comportamiento mecánico y anatómico para un muestreo no destructivo. Los árboles fueron cortados desde Mulchén y Yungay en la región del Bío-Bío.
Paulina Valenzuela   +3 more
doaj  

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