Biotemplated Silica and Silicon Materials as Building Blocks for Micro- to Nanostructures
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Hammond_Biotemplated silica.pdf
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2.48 MB
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Author(s)
Dorval Courchesne, Noemie-Manuelle
Cantu, Victor Javier
Hammond, Paula T
Belcher, Angela M
Steiner, Stephen A.
Date Issued
July 2015
Journal
Chemistry of Materials
Publisher
American Chemical Society (ACS)
Citation
Dorval Courchesne, Noémie-Manuelle et al. “Biotemplated Silica and Silicon Materials as Building Blocks for Micro- to Nanostructures.” Chemistry of Materials 27.15 (2015): 5361–5370.
Version
Author's final manuscript
Abstract
Materials designed to undergo a phase transition at a prescribed temperature have been advanced as elements for controlling thermal flux. Such phase change materials can be used as components of reversible thermal diodes, or materials that favor heat flux in a preferred direction; however, a thorough mathematical analysis of such diodes is thus far absent from the literature. Herein, it is shown mathematically that the interface of a phase change material with a phase invariant one can function as a simple thermal diode. Design equations are derived for such phase change diodes, solving for the limits where the transition temperature falls within or outside of the temperature gradient across the device. Criteria are derived analytically for the choice of thermal conductivity of the invariant phase to maximize the rectification ratio. Finally, the model is applied to several experimental systems in the literature, providing bounds on observed performance. This model should aid in the development of materials capable of controlling heat flux.
MIT Department
Massachusetts Institute of Technology. Department of Biological Engineering
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Koch Institute for Integrative Cancer Research at MIT
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/acs.chemmater.5b01844
