scholarly journals Micro-mechanical properties of single high aspect ratio crystals

CrystEngComm ◽  
2019 ◽  
Vol 21 (38) ◽  
pp. 5738-5748 ◽  
Author(s):  
François S. Hallac ◽  
Ioannis S. Fragkopoulos ◽  
Simon D. Connell ◽  
Frans L. Muller
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Elastic Modulus ◽  
Aspect Ratio ◽  
Single Crystal ◽  
High Aspect Ratio ◽  
New Method ◽  
Force Microscopy ◽  
Atomic Force

This work describes a new method to measure breakage strength and elastic modulus of single crystal cantilevers using atomic force microscopy.

Ultrasharp and high aspect ratio carbon nanotube atomic force microscopy probes for enhanced surface potential imaging

2008 ◽  
Vol 19 (23) ◽  
pp. 235704 ◽  
Author(s):  
Minhua Zhao ◽  
Vaneet Sharma ◽  
Haoyan Wei ◽  
Robert R Birge ◽  
Jeffrey A Stuart ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Surface Potential ◽  
High Aspect Ratio ◽  
Force Microscopy ◽  
Atomic Force ◽  
Enhanced Surface

Atomic force microscopy-based nanomechanical characterization of kenaf fiber

2019 ◽  
Vol 54 (15) ◽  
pp. 2065-2071 ◽  
Author(s):  
M Subbir Parvej ◽  
Xinnan Wang ◽  
Joseph Fehrenbach ◽  
Chad A Ulven
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Elastic Modulus ◽  
Adhesion Force ◽  
Fiber Surface ◽  
Gauge Length ◽  
Hibiscus Cannabinus ◽  
Kenaf Fiber ◽  
Force Microscopy ◽  
Atomic Force

Kenaf ( Hibiscus cannabinus L.) fiber is being extensively used as a reinforcement material in composites due to its excellent mechanical properties. To use this fiber more efficiently, it is necessary to understand its mechanical properties at micro/nano meter scale. Despite the evidence of some past studies to determine the elastic modulus of kenaf fiber, most of them were performed on fiber bundles. Bundle-based method to find the elastic moduli has some obvious issues of foreign materials being present, incorrect gauge length, and sample diameter due to void spaces. These issues pose as obvious hurdles to determine the elastic modulus accurately. In this study, individual kenaf micro fiber was used to find elastic modulus in the radial direction. The radial elastic modulus of the fiber was characterized by atomic force microscopy-based nanoindentation. To determine the radial elastic modulus from the force versus sample deformation data, the extended Johnson–Kendall–Roberts model was used which considered adhesion force from the fiber surface. The radial elastic modulus of the kenaf fiber was found to be 2.3 GPa.

scholarly journals Elucidating nanoscale mechanical properties of diabetic human adipose tissue using atomic force microscopy

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
J. K. Wenderott ◽  
Carmen G. Flesher ◽  
Nicki A. Baker ◽  
Christopher K. Neeley ◽  
Oliver A. Varban ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metabolic Disease ◽  
Atomic Force Microscopy ◽  
Adipose Tissue ◽  
Elastic Modulus ◽  
Tissue Mechanics ◽  
Health Concern ◽  
Force Microscopy ◽  
Atomic Force ◽  
The Impact

AbstractObesity-related type 2 diabetes (DM) is a major public health concern. Adipose tissue metabolic dysfunction, including fibrosis, plays a central role in DM pathogenesis. Obesity is associated with changes in adipose tissue extracellular matrix (ECM), but the impact of these changes on adipose tissue mechanics and their role in metabolic disease is poorly defined. This study utilized atomic force microscopy (AFM) to quantify difference in elasticity between human DM and non-diabetic (NDM) visceral adipose tissue. The mean elastic modulus of DM adipose tissue was twice that of NDM adipose tissue (11.50 kPa vs. 4.48 kPa) to a 95% confidence level, with significant variability in elasticity of DM compared to NDM adipose tissue. Histologic and chemical measures of fibrosis revealed increased hydroxyproline content in DM adipose tissue, but no difference in Sirius Red staining between DM and NDM tissues. These findings support the hypothesis that fibrosis, evidenced by increased elastic modulus, is enhanced in DM adipose tissue, and suggest that measures of tissue mechanics may better resolve disease-specific differences in adipose tissue fibrosis compared with histologic measures. These data demonstrate the power of AFM nanoindentation to probe tissue mechanics, and delineate the impact of metabolic disease on the mechanical properties of adipose tissue.

On-Demand 3D Printing of Nanowire Probes for High-Aspect-Ratio Atomic Force Microscopy Imaging

2020 ◽  
Vol 12 (41) ◽  
pp. 46571-46577
Author(s):  
Heekwon Lee ◽  
Zhuofei Gan ◽  
Mojun Chen ◽  
Siyi Min ◽  
Jihyuk Yang ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
3D Printing ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
On Demand ◽  
Atomic Force ◽  
Atomic Force Microscopy Imaging

Mapping of Nanoscale Mechanical Properties of Polymers in Quasi-static and Oscillatory Atomic Force Microscopy Modes

MRS Advances ◽  
2016 ◽  
Vol 1 (40) ◽  
pp. 2763-2768 ◽  
Author(s):  
Sergei Magonov ◽  
Marko Surtchev ◽  
John Alexander ◽  
Ivan Malovichko ◽  
Sergey Belikov
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Elastic Modulus ◽  
Polymer Materials ◽  
Work Of Adhesion ◽  
Force Microscopy ◽  
Atomic Force ◽  
Time Dependencies ◽  
Force Curves ◽  
20 Nm

ABSTRACTRecent advances in studies of local mechanical properties of polymers with different atomic force microscopy techniques (contact, Hybrid and amplitude modulation modes) are described in interplay between experiment and theory. Analysis of force curves and time dependencies of probe response to sample compliance, which were recorded on a number of polymer materials at various temperatures, leads to quantitative mapping of specific mechanical properties (elastic modulus, work of adhesion, etc). High spatial resolution of elastic modulus mapping (10-20 nm) is illustrated in measurements of lamellar structures of several polymers. Challenges of examination of viscoelastic properties are pointed out and a possible solution is presented.

Profiles of a high-aspect-ratio grating determined by spectroscopic scatterometry and atomic-force microscopy

2006 ◽  
Vol 45 (14) ◽  
pp. 3201 ◽  
Author(s):  
J. Garnaes ◽  
P.-E. Hansen ◽  
N. Agersnap ◽  
J. Holm ◽  
F. Borsetto ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals Ultrastructural and nanomechanical changes of the cornea following enzymatic degradation

2018 ◽  
Vol 2 (2) ◽  
pp. 24-29
Author(s):  
Ahmed Kazaili ◽  
Riaz Akhtar
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Elastic Modulus ◽  
Enzymatic Degradation ◽  
Enzymatic Treatment ◽  
Force Microscopy ◽  
Collagen Organization ◽  
Atomic Force ◽  
Ocular Disorders ◽  
Porcine Cornea

Understanding of the ultrastructure and nanomechanical behavior of the cornea is important for a number of ocular disorders. In this study, atomic force microscopy (AFM) was used to determine nanoscale changes in the porcine cornea following enzymatic degradation. Diff erent concentrations of amylase were used to degrade the cornea. A reduction in elastic modulus at the nanoscale, along with disrupted collagen morphology, was observed following enzymatic treatment. This study highlights the interplay between mechanical properties and collagen organization in the healthy cornea.

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