Molecular design of hybrid materials for novel mechanical properties
Abstract/Contents
- Abstract
- Hybrid molecular materials are an important class of nanomaterials as the combination of organic and inorganic species at the molecular scale leads to novel properties and functionalities. However, designing hybrids to maintain high levels of mechanical strength and stiffness remains a significant challenge that can ultimately limit their integration into emerging nanotechnologies including dielectrics in microelectronics, antireflective (AR) coatings, protective coatings in flexible electronics, and molecular sieves for biosensing. Before strategies can be proposed to enhance the mechanical integrity of these materials, their fundamental properties must be understood. As a result, the discovery of elastic and thermal expansion asymmetries (these materials have different mechanical properties in compression and tension) is introduced, which has significant implications for thermomechanical reliability. The underlying atomistic/molecular-level mechanism is developed and molecular design strategies are presented on how to control these asymmetries. After establishing the fundamental properties of these materials and their connection to molecular structure, a new molecular design principle is introduced for these materials to achieve exceptional mechanical properties: hyperconnected network architectures. Here, the key innovation is to understand how the intrinsic molecular structure can be designed to enhance network connectivity beyond an atom's chemical coordination number. This results in mechanically robust hybrid materials (e.g. hybrids with significantly lower density but higher stiffness than fully dense silica), a vital step towards their successful integration into emerging nanotechnologies.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2017 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Burg, Joseph A |
|---|---|
| Associated with | Stanford University, Department of Materials Science and Engineering. |
| Primary advisor | Dauskardt, R. H. (Reinhold H.) |
| Thesis advisor | Dauskardt, R. H. (Reinhold H.) |
| Thesis advisor | Devereaux, Thomas Peter, 1964- |
| Thesis advisor | Nørskov, Jens K |
| Advisor | Devereaux, Thomas Peter, 1964- |
| Advisor | Nørskov, Jens K |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Joseph A. Burg. |
|---|---|
| Note | Submitted to the Department of Materials Science and Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2017. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2017 by Joseph Andrew Burg
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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