nanoHUB-U: Fundamentals of Atomic Force Microscopy, Part 1: Fundamental Aspects of AFM

nanoHUB-U: Fundamentals of Atomic Force Microscopy, Part 1: Fundamental Aspects of AFM

Offering: 01a Section: Self Paced

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  • Lecture 5.1: Force-Distance Simulations with VEDA 1. Lecture 5.1: Force-Distance Si… 0
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  • Week 5 2. Week 5 86
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  • First - A Few Comments It is more effective to spend time and learn VEDA than to write the equivalent software yourself. You can improve your efficiency on an AFM instrument by first running realistic simulations of experiments that you might perform. If you see an empty graph after a simulation, use the Result menu in the Simulate tab and select ErrorMessage. Usually a helpful hint will appear. If an input window happens to require two input values, make sure they are comma separated. If a plot doesn’t make sense, try a different value for k, the cantilever spring constant. Results of almost any VEDA simulation should change with k. For initial use of a tool, choose the input default values and make sure you understand the resulting plot(s) before tailoring to your application. Sometimes, a simulation will 3. First - A Few Comments It is m… 122.63333333333334
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  • If you do not understand requested parameters, check out the complete VEDA manual which is currently located at nanohub.org/resources/adac/supporting docs If you have a reasonably reliable internet connection, the longest time required for an approach curve simulation is about 1 minute of real time. Whether you perform an approach or retract simulation depends on the initial and final z separation that you specify. For example: Initial z separation=+6 nm, Final z separation= -6 nm: approach Initial z separation=-6 nm, Final z separation= +6 nm: withdraw 4. If you do not understand reque… 344.33333333333331
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  • Force-Distance Simulations using VEDA 5. Force-Distance Simulations usi… 481.13333333333333
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  • The Force Distance Module 6. The Force Distance Module 571.5
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  • Many Simulations are Possible 7. Many Simulations are Possible 636.5
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  • Simulation results - magnified 8. Simulation results - magnified 720.13333333333333
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  • Example 1: 9. Example 1: 800.26666666666665
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  • Echo Input File 10. Echo Input File 881.33333333333337
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  • Results 11. Results 946.76666666666665
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  • Magnified near Jump-to-Contact; include infinitely hard sample 12. Magnified near Jump-to-Contact… 1056.7666666666667
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  • Indentation Plot 13. Indentation Plot 1144.7666666666667
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  • Tip-Sample Gap 14. Tip-Sample Gap 1182.9666666666667
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  • Example 2: 15. Example 2: 1323.1333333333334
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  • Up Next: Force-Distance Simulations using the JKR Model; Investigating the effect of tip radius; Hertz Model 16. Up Next: Force-Distance Simula… 1391.8666666666666
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L5.1: Computer Simulations using VEDA - Force-Distance Simulations I

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