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nanoHUB-U Fundamentals of AFM L2.2: Tip-Surface Interactions (Contact) - Surface Energies

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Published on Jun 2, 2014

Table of Contents:
00:09 Lecture 2.2: Surface Energy and Adhesion
01:39 Surfaces and Interfaces
03:08 A Fundamental Quantity - (Excess) Surface Energy
04:33 Surface Energy -- Empirical Law
06:38 Calculating Surface Energies
08:10 Measuring Surface Energies
10:45 high surface energy ↔ strong cohesion ↔ high melting temperatures
11:33 Why do different materials stick together
14:47 Adhesion
16:47 Work of Cohesion and Work of Adhesion
18:40 Lifshitz theory provides a rough empirical rule
20:14 Interfacial physics/chemistry at a S/S interface

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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