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nanoHUB-U Fundamentals of AFM L2.4: Tip-Surface Interactions (Contact) - Elasticity of Materials

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Published on Jun 2, 2014

Table of Contents:
00:09 Lecture 2.4: Elasticity of Materials
00:52 Nanomechanics - what happens at contact?
03:36 External Forces Deform Solids
06:13 Young's Modulus of the Elements
07:08 Young's Modulus by material class
08:19 Young's Modulus -- various materials
09:11 A normal stress produces strains in lateral directions
10:35 Poisson's Ratio for the Elements
11:06 Poisson's Ratio by material class
12:02 Example: A cube of material 25 mm on a side
14:28 Microscopic Model for Young's Modulus
17:06 Correlation with atomic interaction potentials (Lennard-Jones)
18:55 Near z=ao, an atom will obey Hook's Law
20:33 Example: for Au atoms
21:59 Up Next: An Introduction to Contact Mechanics

This video is part of nanoHUB-U's course Fundamentals of Atomic Force Microscopy: Part 1 Fundamental Aspects of AFM. (https://nanohub.org/courses/AFM1)

Structured as two 5-week courses, this unique set of courses developed by Profs. Ron Reifenberger and Arvind Raman, look at the underlying fundamentals of atomic force microscopy and exposes the knowledge base required to understand how an AFM operates.

The atomic force microscope (AFM) is a key enabler of nanotechnology, and a proper understanding of how this instrument operates requires a broad-based background in many disciplines. Few users of AFM have the opportunity or resources to rapidly acquire the interdisciplinary knowledge that allows an intelligent operation of this instrument. This focused, in-depth course solves this problem by presenting a unified discussion of the fundamentals of atomic force microscopy.

Fundamentals of Atomic Force Microscopy, Part 2: Dynamic AFM Methods provides an in-depth treatment of dynamic mode AFM.

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