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Related Concept Videos

Frictional Force01:07

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When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
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In curved beams, unlike straight beams, the stress distribution across the cross-section is not uniform due to the beam's curvature. This non-uniformity arises because the neutral axis, where stress is zero, does not align with the centroid of the section. In a curved beam, the strain varies along the section as a function of the distance from the neutral axis.
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Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
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Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
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Related Experiment Video

Updated: Mar 1, 2026

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
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Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid

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From force curves to surface nanomechanical properties.

Per M Claesson1, Illia Dobryden, Gen Li

  • 1KTH Royal Institute of Technology, School of Chemical Science and Engineering, Department of Chemistry, Surface and Corrosion Science, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden. percl@kth.se.

Physical Chemistry Chemical Physics : PCCP
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Summary

Scanning probe methods, particularly atomic force microscopy (AFM), are crucial for measuring local surface properties. This study highlights AFM-based techniques for determining surface nanomechanical properties and discusses associated challenges.

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Area of Science:

  • Interdisciplinary surface science, encompassing chemistry, physics, biology, and materials science.

Background:

  • Surface science demands detailed understanding of local properties and variations.
  • Scanning probe methods enable measurement of local chemical, electrical, and mechanical properties.
  • These techniques drive advancements in fundamental science and applied areas like materials and corrosion.

Purpose of the Study:

  • To focus on scanning probe methods for determining surface nanomechanical properties.
  • To review AFM-based modes used for nanomechanical measurements.
  • To present examples and discuss challenges in surface nanomechanical analysis.

Main Methods:

  • Utilizing atomic force microscopy (AFM) based modes.
  • Applying various AFM techniques to probe local surface characteristics.
  • Analyzing data from AFM measurements to understand nanomechanical behavior.

Main Results:

  • Demonstrated the capability of AFM-based methods to determine surface nanomechanical properties.
  • Provided illustrative examples of the data obtainable through these techniques.
  • Identified and discussed practical difficulties encountered in surface nanomechanical studies.

Conclusions:

  • AFM-based scanning probe methods are vital for characterizing surface nanomechanics.
  • Understanding these properties is key for applications in materials science.
  • Further research is needed to overcome existing challenges in the field.