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Dec 15, 2011

Dr. Asthana Presentation

1. What are grains and grain boundaries in a material? I suggest you focus on metals. Explain how material properties are affected by the size of these grains.
grain boundary is the interface between two grains, or crystallites, in a polycrystalline material. Grain boundaries are defects in the crystal structure, and tend to decrease the electrical and thermal conductivity of the material. The high interfacial energy and relatively weak bonding in most grain boundaries often makes them preferred sites for the onset of corrosion and for the precipitation of new phases from the solid. They are also important to many of the mechanisms of deformation. Reducing crystal size is a great way to increase strength between molecules

2. How does one engineer or process materials to reduce the grain size? In particular, I would like for you to explore and then explain how single crystal silicon is produced for the solar industry.
Grain size is often determined by the rate at which the material cooled during forming. If you can melt the material and then cool it rapidly, that would create small grains. Using methods to first purify the substance, could use extreme amounts of heat boiling out undesired, then rapidly cool it to berid of grains.

Dec 6, 2011

Blog post 13: Nano and Proteins

1. MALDI stands for Matrix assisted laser desorption/ionization it is used for predicting polymer properties and morphology.

2. Microcystin LR:

3. Microcystin LR: 200nm
Collagen: 300nm long 1.5nm in diameter
Hemoglobin: 600-900nm

4.Liquid proteins in protein synthesis

Blog Post 12: Invention Background/references

2) Preparation and Characterization of Nano-NTO Explosive.

3) Generation and characterization of nano aluminum powder obtained through wire explosion process.

4) Production and Characterization of Nano Copper Powder Using Pulsed Power Technique.

5) Solution combustion synthesis of nano particleLa<sub>0.9</sub>Sr<sub>0.1</sub>MnO<sub>3</sub> powder by a unique oxidant-fuel combination and its characterization.

6) Structure, Thermal Properties, and Combustion Behavior of Plasma Synthesized Nano-Aluminum Powders.

7) Nano-Blast Synthesis of Nano-size CeO<sub>2</sub>–Gd<sub>2</sub>O<sub>3</sub>Powders.

8) Nano-MnFe<sub>2</sub>O<sub>4</sub> powder synthesis by detonation of emulsionexplosive.

9) Dense-Phase Pneumatic Conveying Technology for Highly Explosive Metal Powders.

10) Ablation combustion of secondary powder explosives.

Nov 8, 2011

Blog post 11: Nano group

Topic: Nano Explosive powder

Members: Richard Hoverman, Kymble S, Bryant Hagen, Elliott C.

Finish research and complete poster before class on December 12th.

Blog post 10: SEM image

First ever image obtained on an SEM picture of a fingernail.

Blog Post 9: Nano project

Topic: Nano Explosive powder

Members: Richard Hoverman, Kymble S, Bryant Hagen, Elliott C.

Finish research and complete poster before class on December 12th.

Blog post 8: Nano applications

1: Car bumpers. Car bumpers today appear to be plastic, but instead are made of very strong Thermoplastic Olefins which are extremely durable to weather and physical contact.

2: Sensodyne. Sensodyne is a toothpaste that when used binds to exposed nerve endings to calm the sensitivity of death.

3: Water proof fabric. Some shirts today are made out of material that is completely resistant to liquids. All liquids roll off and lack the ability to "soak in" removing the chance of stains.

4: Nanoknife. A new method used to remove tumors completely curing cancer.

5: Technion alumni: have been making headlines by using nanotech to design one of the world’s most shock-resistant protective coatings five times the strength of steel - to protect troops and vehicles on the battlefield.

6: Tennis Balls: Having a coating of clay on the inside so air cannot escape making them extremely durable.

7: Golf  Balls: Some golf balls use exceptional core technology and perforation of the outside to create the ideal range of a golf ball.

8: Tape: Modern day touch screens and LCD screens are derivations of tape which give us the crystal clear images we see daily.

9: Tennis Rackets: Have the strength of steel and are extremely durable.

10: Self cleaning glass: The sun activates nano particals in the glass cleaning the immediate surface.