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NANO WHISKERS
General Definition ,[object Object]
METALLURGY ,[object Object]
Types of metal whiskers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Pictures of Metal whiskers
Properties of whiskers ,[object Object],[object Object],[object Object],[object Object],[object Object]
Whiskers vs. Dendrites ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Mechanism of Growth ,[object Object],[object Object]
Video Demonstration of Tin whiskers Growth
Commonly Accepted Factors  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Recent Attention to Metal Whiskers? ,[object Object],[object Object]
Failures by Whiskers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Nano Whiskers ,[object Object],[object Object]
Fullerene, C 60  Nano Whiskers ,[object Object],[object Object],[object Object],[object Object]
Preparation of C  60  Nanowhiskers: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Properties of C 60  Nano whiskers ,[object Object],[object Object],[object Object]
Solvent Solutions Tested Organic layer Polar layer Toluene Iso propyl alcohol Carbon disulfide Iso propyl alcohol Cholro benzene Iso propyl alcohol Pyridine Iso propyl alcohol Toluene Acetone Toluene Water
Carbon: C 60 Organic: Toluene Polar: Water Stored in: Solution Magnification: 60x
Transmission Electron Microscope 8000x
Silicon Nanowhiskers ,[object Object],[object Object],[object Object],[object Object],[object Object]
SEM cross section images of Silicon whiskers grown on a Silicon substrate for a) 60 min b) 120 min  growth time at  T S   525 °C.  TEM cross section image of a Silicon whisker with a length of about 300 nm and a diameter of 95 nm on a Silicon substrate.
Crossed Nanowhiskers ,[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cellulose Nanowhiskers Properties Cellulose Nanowhiskers Physical structure Needle- whiskers Chemical structure cellulose Interactions Hydrogen bond Tensile modulus ~130 GPa Tensile strength 10 GPa Electrical resistivity 10 10  - 10 16  ohms cm Thermal conductivity Insulator Density 1.2 g/cm 3 Coef. Thermal expan 8 -16X 10 -6
Preparation of Cellulose Nanowhiskers ,[object Object],[object Object]
Nanowhiskers in use ,[object Object],[object Object],water droplet
Stain Resistance ,[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
Electronics ,[object Object],[object Object]
Be the Best and  Betray the Worst.

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Nano Whiskers

  • 2.
  • 3.
  • 4.
  • 5. Pictures of Metal whiskers
  • 6.
  • 7.
  • 8.
  • 9. Video Demonstration of Tin whiskers Growth
  • 10.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16.
  • 17. Solvent Solutions Tested Organic layer Polar layer Toluene Iso propyl alcohol Carbon disulfide Iso propyl alcohol Cholro benzene Iso propyl alcohol Pyridine Iso propyl alcohol Toluene Acetone Toluene Water
  • 18. Carbon: C 60 Organic: Toluene Polar: Water Stored in: Solution Magnification: 60x
  • 20.
  • 21. SEM cross section images of Silicon whiskers grown on a Silicon substrate for a) 60 min b) 120 min growth time at T S 525 °C. TEM cross section image of a Silicon whisker with a length of about 300 nm and a diameter of 95 nm on a Silicon substrate.
  • 22.
  • 23.
  • 24. Cellulose Nanowhiskers Properties Cellulose Nanowhiskers Physical structure Needle- whiskers Chemical structure cellulose Interactions Hydrogen bond Tensile modulus ~130 GPa Tensile strength 10 GPa Electrical resistivity 10 10 - 10 16 ohms cm Thermal conductivity Insulator Density 1.2 g/cm 3 Coef. Thermal expan 8 -16X 10 -6
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30. Be the Best and Betray the Worst.