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nanoHUB-U Fundamentals of AFM L2.5: Tip-Surface Interactions (Contact) - Contact Mechanics

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Published on Jun 2, 2014

Table of Contents:
00:09 Lecture 2.5: Contact Mechanics Predict the stresses and ...
01:17 Action of a point force (Boussinesq, 1885)
02:33 Action of a punch with circular cross-section
03:27 Action of a cone-shaped punch
04:16 At a microscopic scale, for small indentations. . . .
05:07 The basic problem
06:51 Need to Develop a Tip-sample Interaction Model
08:31 elastic, with adhesion in contact region
10:29 Surface forces give rise to surface energies
12:37 Standard results
15:33 JKR Adhesion - consequences
17:47 Example
21:10 Which contact model to choose?
22:05 Validity of different models
23:27 Transition from DMT to JKR: Maugis-Dugdale Theory
24:59 Up Next: Combining contact mechanics with intermolecular interactions

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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