| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Mesoscale Phenomena in Functional Polycrystals and Their Nanostructures
|
| Presentation Title |
From Nanoparticles to Nanocrystalline Solids with New Functionalities:
Thermoelectrics as a Case Study |
| Author(s) |
Boris Feygelson, James Wollmershauser, Kevin Anderson, Benjamin Greenberg, Alan Jacobs |
| On-Site Speaker (Planned) |
Boris Feygelson |
| Abstract Scope |
Scaling grains down to nanometer size enhances many properties of polycrystalline solids due to an increase of the grain boundary interfacial volume fraction. Sintering of nanoparticles is the most versatile way to produce nanocrystalline solids of various materials. It is well established that the main prerequisite for obtaining such size dependent properties in these materials is removing porosity while preserving nanoscale morphology and grain size.
Furthermore, these nanoparticle building blocks can be engineered by designing and synthesizing core/shell structures. By sintering core/shell nanoparticles to a fully dense solid while preserving their initial design, novel bulk materials can be fabricated with properties controlled by rationally designed core/shell geometries and properties, and the resultant vast network of interfaces.
We exploit this possibility in order to improve thermoelectric material performance by engineering the properties of nanoparticle cores, shells, and interfaces and spatially decoupling interdependent thermal and electronic transport properties at the nanoscale. |