Explore nanoscience with virtual labs and simulations
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Nano-World, A Showcase for technology-enhanced Learning, presented at EDUCON 2010, in Madrid
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Semelhante a Explore nanoscience with virtual labs and simulations
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Explore nanoscience with virtual labs and simulations
- 1. Library of Labs Nano-World A Showcase Suite for Technology- Enhanced Learning Florian Müller, Martin Guggisberg, Helmar Burkhart and Tibor Gyalog Email:Martin.Guggisberg@unibas.ch Co-funded by the Community programme eContentplus
- 2. Outlook Library of Labs • Nanoscience Education • Virtual Experiments: NanoSimulator • Nano3D Visualization Tool • Interactive NanoJoystick
- 3. Library of Labs NanoScience See the invisible Co-funded by the Community programme eContentplus
- 4. x 90‘000 Eyes Library of Labs Electro Microscope x 300 x 27‘000‘000 Light Microscope Atomic Force Microscope
- 5. Library of Labs Real Nanoscience Laboratory UHV Atomic Force Microscopy (AFM) University Basel Group of Prof. E. Meyer http://www.nanoscience.ch
- 6. Virtual Experiments: NanoSimulator Library of Labs Swiss Virtual Campus Project 2000 - 2006 http://www.virtualcampus.ch/ • Single Molecule • Electrochemistry • Imaging / 3D Visualiation • Friction Download the NanoSimulator from: http://www.nano-world.org
- 7. Fricton on the nanoscale Library of Labs The friction mode of the nanosimulator allows students to observe atomic stick-slip. This phenomena is well described in many actual nanoscience publications. Visit: http://friction.nano-world.org/
- 8. Tomlinson mechanism Library of Labs Explanation of stick slip phenomena Simulations are based on an elastic deformation model FN FL v
- 9. Specific task for the students Library of Labs • Students have to fullfill specific taks and write a report on. • for example
- 10. Concrete task for the students Library of Labs Calculation of the torsional spring constant by FFM 10 nN k= F/s 0.8 nm
- 11. Nano3D Visualization Tool Library of Labs Nano3D hides the complexities of the tool chain by using a parameter-oriented webapplication scale 7346484746474038 4538294747397389 top 2823673836489393 7839903745936393 6738930939037347 7456483936383992 0390099373789300 0303030387877437 bottom
- 12. nano3D, Webinterface Library of Labs http://image3d.epistemis.com
- 13. Si 7x7 (111) low temperature Library of Labs Nano3D allaws students to work on true experiment data Publication: M. Lantz et al.,Phys. Rev. Lett., 84(12):2642, 2000
- 14. nano3D Si(111) 7x7 Library of Labs Exploring scientific data through 3D visualization Size: 5.00 x 5.00 nm
- 15. Explroing scientific data Library of Labs Cu (111) Surface Size: 300 x 300 nm
- 16. Interactive NanoJoystick Library of Labs NanoJoystick follows a game-based learnig approach Students control the movement of the virtual tip of a scanning tunneling microscope
- 17. The game-based approach allows an intuitive first contact with the field of nanoscience Library of Labs Science Days 2008 over 10‘000 visitors during 3 days
- 18. Library of Labs THANK YOU FOR YOUR ATTENTION
- 19. Nano-Switzerland < 300 atoms Library of Labs Size: 9.10 x 7.30 nm non-contact AFM / UHV Microscope Basel, Group Prof. E. Meyer M. Bammerlin 1999
- 20. Applet and Java Application Library of Labs Download: http://sourceforge.net/projects/vexp/.
- 21. Problem oriented approach Library of Labs • Typical Questions: • What is friction on the nano scale? • What is energy dissipation at an atomic level? • How can the energy dissipatation by measured? • How can superlubricity be reached?
- 22. Nanotribology: Examination of individual micro or Library of Labs nano-contacts 1-100nm
- 23. AFM on NaF(001) Library of Labs • contact mode imaging on NaF(001) • observation of the atomic periodicity • steps area distorted in a range of 1 nm ⇒ 1 nm contact radius 1nm
- 24. Friction on the Nanometer-scale: Atomic- Stick Slip Library of Labs Atomic stick-slip Friction loop FN = 0.44 nN Ediss = 1.4 eV KBr(001)-crystal (per slip)
- 25. Tomlinson model Library of Labs The tip is subject to: 1) periodic interaction with the underlying surface 2) elastic deformation of the cantilever FN FL v • In 1D the corresponding potential energies are represented by: E0 xtip 1 V = − cos(2π ) + k eff ( xtip − x) 2 2 a 2 a sinusoid a parabola
- 26. Change interanal Parameters Library of Labs command=set name=springconstant value=865
- 27. 4. What is a virtual laboratory? Library of Labs An example: The friction simulator at Nano-World (University of Basel) enables students to simulate friction phenomena on an atomic scale.