記録された日時: December 13 2006

Duration: 01 hours 05 minutes 27 seconds

This presentation will discuss some of the difficulties in producing nanomaterials, i.e. materials that have at least one dimension less 100nm
Table of contents
1. Nanotechnology – dispersion and other issues
01:33
2. Introduction
00:52
3. Format
01:00
4. Nanotechnology
01:23
5. Eric Drexler
00:45
6. Ladybug - 35mg Elephant – cow – not bull – 3500kg
00:44
7. Nanotechnology
01:23
8. New public (free) standard from ASTM http://www.astm.org
00:40
9. PAS71 from BSI, UK
00:38
10. Nanotechnology – dispersion and other issues
00:52
11. Aggregates/agglomerates
01:37
12. Definitions
01:30
13. Particle-particle interactions
01:39
14. In infinite dilution…..
01:26
15. Van de Waals forces
01:27
16. Van der Waals (from Wikipedia)
00:36
17. London-van der Waals Force
00:59
18. VDW (continued)
00:42
19. Why can a gecko walk on the ceiling?
01:10
20. Why can a gecko walk on the ceiling?
00:05
21. Evidence
00:31
22. Why can a gecko walk on the ceiling?
00:04
23. Strength of adhesion
01:36
24. Dry analysis
01:21
25. Rumpf - agglomerate strengths
01:08
26. Gold
00:44
27. Fick’s Law of diffusion
01:03
28. Thus….
01:22
29. Bulk/Primary: solid bridging; room temperature sintering
02:00
30. Evolution of Dispersion Methods
00:51
31. TiO2
01:00
32. Comparisons
00:15
33. Gas phase nanoparticle sintering
00:09
34. Gas phase nanoparticle sintering
01:08
35. Solid-solid diffusion
00:39
36. Knowledge is Power…
00:20
37. Knowledge is Power… Date: 1850…
00:20
38. Bridging will always occur - in the dry state!
00:38
39. Adhesion forces - dry milling Theoretical limit of a ball mill
01:12
40. Settling rates
01:29
41. Bridging will always occur - in the dry state!
00:17
42. Producing a stable dispersion
02:04
43. Powder
01:02
44. Dissolution
00:57
45. Stress Corrosion Cracking
00:45
46. Tests for “nano”
01:20
47. Summary/Conclusions
00:56
48. Questions?
01:39
49. Untitled
04:02
50. Comparisons
01:16
51. Van der Waals (from Wikipedia)
04:04
52. Contact information
08:14