Nanomaterials and nanotechnologies

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AssighmentSTC.docx

1. Nanomaterials and nanotechnologies are very important for current and next generation technologies. For metallurgical technology, powder metallurgy, in which the metal powders are utilized, is an important branch of the metallurgy. Currently, the nanoparticles of some metals, such as gold and silver, are widely utilized in biological and chemical detections. You may assume the metal nanoparticles are perfect spheres.

a). From thermodynamic point of view, the nanomaterials are different with the bulk materials since the nanomaterials have a much higher surface-to-volume ratio. Certainly, the surface energy plays a role in the melting behavior of the materials. Please discuss the influence of the surface energy on the melting process (i.e., melting temperature) of the nanoparticles. b) Please select a metal for your study. Discuss the influence of the size on the phase transition behavior(s) (such as melting behavior) of the metal nanoparticles. c). Following your discussion above, please modify the phase diagram of pure iron to describe the phase behavior of nanosized iron particles using properties of iron. You have to cite the resource of the property you used in your discussion.

Format: Follow the requirement for the submissions to Journal of Applied Physics except your submission should be in single space rather than double space. Length: Reasonable length as you may think.

The file should be in both WORD form and PDF form. There are 30 pts for the format.  5 pts for each of following six aspects: o submission email o title o references o figures o text o overall.