Self-Assembled Patterns and Young’s Modulus of Single-Layer Naphthalocyanine Molecules on Ag(111)

2015 ◽  
Vol 119 (15) ◽  
pp. 8208-8212 ◽  
Author(s):  
Rongting Wu ◽  
Linghao Yan ◽  
Yanfang Zhang ◽  
Junhai Ren ◽  
Deliang Bao ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Single Layer ◽  
Self Assembled

Coating agent-induced mechanical behavior of 3D self-assembled nanocrystals

2017 ◽  
Vol 19 (35) ◽  
pp. 23887-23897 ◽  
Author(s):  
Arzu Çolak ◽  
Jingjing Wei ◽  
Imad Arfaoui ◽  
Marie-Paule Pileni
Keyword(s):  
Mechanical Behavior ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Three Dimensional ◽  
Coating Agent ◽  
Self Assembled

The Young's modulus of three-dimensional self-assembled Ag nanocrystals, as so-called supracrystals, is correlated with the type of coating agent as well as the nanocrystal morphology.

Self-assembled free-standing graphene oxide hybrid films modified by silane functionalized TiO2 nanotubes to increase their final Young's modulus

2019 ◽  
Vol 231 ◽  
pp. 114-120
Author(s):  
Miguel Angel Garcia-Zuñiga ◽  
Ferdinando Tristan ◽  
Gladis Judith Labrada-Delgado ◽  
Andres Fest-Carreño ◽  
Alejandro Alcaraz-Caracheo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Young’S Modulus ◽  
Tio2 Nanotubes ◽  
Young's Modulus ◽  
Hybrid Films ◽  
Free Standing ◽  
Self Assembled

Microbridge Testing of Silicon Oxide/Silicon Nitride Bilayer Films

2000 ◽  
Vol 657 ◽  
Author(s):  
C.-F. Qian ◽  
Y.-J. Su ◽  
M.-H. Zhao ◽  
T.-Y. Zhang
Keyword(s):  
Residual Stress ◽  
Silicon Nitride ◽  
Young’S Modulus ◽  
Silicon Oxide ◽  
Young's Modulus ◽  
Single Layer ◽  
Bilayer Films ◽  
Silicon Nitride Films ◽  
Small Deflection ◽  
Equivalent Bending Stiffness

ABSTRACTThe present work further develops the microbridge testing method to characterize mechanical properties of bilayer thin films. A closed-form formula for deflection versus load under small deflection is derived with consideration of the substrate deformation and residual stress in each layer. The analysis shows that the solution for bending a bilayer beam is equivalent to that for bending a single-layer beam with an equivalent bending stiffness, an equivalent residual force and a residual moment. One can estimate the Young's modulus and residual stress in a layer if the corresponding values in the other layer are known. The analytic results are confirmed by finite element calculations. The microbridge tests are conducted on low-temperature-silicon oxide (LTO)/silicon nitride bilayer films as well as on silicon nitride single-layer films. All microbridge specimens are prepared by the microfabricating technique. The tests on the single-layer films provide the material properties of the silicon nitride films. Then, applying the proposed method for bilayer films under small deflection yields the Young's modulus of 37 GPa and the residual stress of -148 MPa for LTO films.

scholarly journals Theoretical Investigation on Failure Strength and Fracture Toughness of Precracked Single-Layer Graphene Sheets

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Xin-Liang Li ◽  
Jian-Gang Guo
Keyword(s):  
Fracture Toughness ◽  
Fracture Mechanics ◽  
Young’S Modulus ◽  
Failure Strain ◽  
Young's Modulus ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Failure Strength ◽  
Griffith Criterion ◽  
Variation Trends

Young’s modulus, failure strength, and failure strain of precracked graphene are investigated via finite element method based on molecular structure mechanics in this research. The influence of distribution, length, and orientation of precrack and graphene sizes on these mechanical properties is analyzed. The ratio of precrack length and graphene width is defined as P value, and its particular value Pc can be found, at which the variation trends of Young’s modulus, failure strength, and strain have changes with increasing P value. In addition, the fracture toughness of precracked graphene is investigated, and the stress intensity factor (SIF) is calculated according to the Griffith criterion in classical fracture mechanics. The numerical values of the SIF are about 3.20-3.37 MPa√m, which are compared with the experimental results, and the simulations verify the applicability of the classical fracture mechanics to graphene.

Silicone Material With Enhanced Permittivity Used for Dielectric Elastomer Transducers

2019 ◽  
Author(s):  
Ozan Çabuk ◽  
Jürgen Maas
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Single Layer ◽  
Tensile Tests ◽  
Dielectric Elastomer ◽  
Work Output ◽  
Standard Material ◽  
Electromechanical Behavior ◽  
High Elasticity ◽  
New Material

Abstract Silicone materials are very appropriate for dielectric elastomer (DE) transducer applications due to their distinguished mechanical and electrical characteristics like high elasticity and an efficient electromechanical behavior. Since the material parameter permittivity influences significantly the work output, Wacker Chemie AG developed a new silicone named ELASTOSIL® Film 5030 with increased permittivity for improving the work output. Within this contribution, the mechanical characteristics including the hyperelasticity and electromechanically coupled behavior is compared to standard silicone material ELASTOSIL® Film 2030 from Wacker Young’s modulus of both materials are obtained conducting tensile tests, while the electromechanical behavior is characterized by investigating a planar single layer DE transducer. The new material has a similar Young’s modulus compared to the standard material. Furthermore, the electrically actuated deformation of the planar single layer DE transducers made form new silicone is proportional larger to its permittivity and inversely proportional to its Young’s modulus under same electrical field applied.

scholarly journals Chondroitinase ABC Enhances Integration of Self-Assembled Articular Cartilage, but Its Dosage Needs to Be Moderated Based on Neocartilage Maturity

Cartilage ◽  
2020 ◽  
pp. 194760352091865 ◽  
Author(s):  
Jarrett M. Link ◽  
Jerry C. Hu ◽  
Kyriacos A. Athanasiou
Keyword(s):  
Articular Cartilage ◽  
Phase I ◽  
Factorial Design ◽  
Young’S Modulus ◽  
Phase Ii ◽  
Young's Modulus ◽  
Full Factorial Design ◽  
Chondroitinase Abc ◽  
Self Assembled ◽  
Full Factorial

Objective To enhance the in vitro integration of self-assembled articular cartilage to native articular cartilage using chondroitinase ABC. Design To examine the hypothesis that chondroitinase ABC (C-ABC) integration treatment (C-ABCint) would enhance integration of neocartilage of different maturity levels, this study was conducted in 2 phases. In phase I, the impact on integration of 2 treatments, TCL (TGF-β1, C-ABC, and lysyl oxidase like 2) and C-ABCint, was examined via a 2-factor, full factorial design. In phase II, construct maturity (2 levels) and C-ABCint concentration (3 levels) were the factors in a full factorial design to determine whether the effective C-ABCint dose was dependent on neocartilage maturity level. Neocartilages formed or treated per the factors above were placed into native cartilage rings, cultured for 2 weeks, and, then, integration was studied histologically and mechanically. Prior to integration, in phase II, a set of treated constructs were also assayed to provide a baseline of properties. Results In phase I, C-ABCint and TCL treatments synergistically enhanced interface Young’s modulus by 6.2-fold ( P = 0.004) and increased interface tensile strength by 3.8-fold ( P = 0.02) compared with control. In phase II, the interaction of the factors C-ABCint and construct maturity was significant ( P = 0.0004), indicating that the effective C-ABCint dose to improve interface Young’s modulus is dependent on construct maturity. Construct mechanical properties were preserved regardless of C-ABCint dose. Conclusions Applying C-ABCint to neocartilage is an effective integration strategy with translational potential, provided its dose is calibrated appropriately based on implant maturity, that also preserves implant biomechanical properties.

Mechanical and thermal properties of graphene–carbon nanotube-reinforced metal matrix composites: A molecular dynamics study

2016 ◽  
Vol 51 (23) ◽  
pp. 3299-3313 ◽  
Author(s):  
Sumit Sharma ◽  
Pramod Kumar ◽  
Rakesh Chandra
Keyword(s):  
Thermal Conductivity ◽  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Single Layer ◽  
Dynamics Simulation ◽  
Single Layer Graphene ◽  
Graphene Sheets ◽  
Layer Graphene

Single layer graphene sheets and carbon nanotubes have resulted in the development of new materials for a variety of applications. Though there are a large number of experimental and numerical studies related to these nanofillers, still there is a lack of understanding of the effect of geometrical characteristics of these nanofillers on their mechanical properties. In this study, molecular dynamics simulation has been used to assess this issue. Two different computational models, single layer graphene sheets–copper and carbon nanotube–copper composites have been examined to study the effect of nanofiller geometry on Young’s modulus and thermal conductivity of these nanocomposites. Effect of increase in temperature on Young’s modulus has also been predicted using molecular dynamics. The effect of nanofiller volume fraction ( Vf) on Young’s modulus and thermal conductivity has also been studied. Results of thermal conductivity obtained using molecular dynamics have been compared with theoretical models. Results show that with increase in Vf the Young’s modulus as well as thermal conductivity of single layer graphene sheets–Cu composites increases at a faster rate than that for carbon nanotube–Cu composite. For the same Vf, the Young’s modulus of single layer graphene sheets–Cu composite is higher than carbon nanotube–Cu composite.

scholarly journals Mechanical properties of monolayer sulphides: a comparative study between MoS2, HfS2 and TiS3

2015 ◽  
Vol 17 (41) ◽  
pp. 27742-27749 ◽  
Author(s):  
Jun Kang ◽  
Hasan Sahin ◽  
François M. Peeters
Keyword(s):  
Mechanical Properties ◽  
Comparative Study ◽  
Young’S Modulus ◽  
Ultimate Strength ◽  
Poisson’S Ratio ◽  
Young's Modulus ◽  
Single Layer ◽  
Poisson's Ratio ◽  
Crystallographic Orientations

The in-plane stiffness (C), Poisson's ratio (ν), Young's modulus and ultimate strength (σ) along two different crystallographic orientations are calculated for the single layer crystals: MoS2, HfS2 and TiS3 in 1H, 1T and monoclinic phases.

Low-force spectroscopy on graphene membranes by scanning tunneling microscopy

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 2148-2153 ◽  
Author(s):  
Bernd Uder ◽  
Haibin Gao ◽  
Peter Kunnas ◽  
Niels de Jonge ◽  
Uwe Hartmann
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Single Layer ◽  
Force Spectroscopy ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Graphene Membrane ◽  
Tunneling Contact ◽  
Graphene Membranes

The subtle interaction between a tip and an atomically thin graphene membrane in tunneling contact can be used for nonindenting force spectroscopy. This was applied to a freestanding single layer of graphene and permitted the detection of Young's modulus.

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