| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2018) | |
| Biomaterial Surfaces & Interfaces | Wednesday Sessions |
| Session BI-WeE |
| Session: | Biomolecule/Material Interactions and Medical Applications |
| Presenter: | Patrick Hopkins, University of Virginia |
| Authors: | J. Tomko, University of Virginia A. Pena-Francesh, Pennsylvania State University H. Jun, Pennsylvania State University M. Tyagi, National Institute of Standards and Technology B. Allen, Pennsylvania State University M. Demirel, Pennsylvania State University P. Hopkins, University of Virginia |
| Correspondent: | Click to Email |
The dynamic control of thermal transport properties in solids must contend with the fact that phonons are inherently broadband. Thus, efforts to create reversible thermal conductivity switches have resulted in only modest on/off ratios, since only a relatively narrow portion of the phononic spectrum is impacted. Here, we report on the ability to modulate the thermal conductivity of topologically networked materials by nearly a factor of four following hydration, through manipulation of the displacement amplitude of atomic vibrations. By varying the network topology, or crosslinked structure, of squid ring teeth-based bio-polymers through tandem-repetition of DNA sequences, we show that this thermal switching ratio can be directly programmed. This on/off ratio in thermal conductivity switching is over a factor of three larger than the current state-of-the-art thermal switch, offering the possibility of engineering thermally conductive biological materials with dynamic responsivity to heat. More details of this work can be found in the recently published paper, Tomko, J.A., Pena-Francesch, A., Jung, H., Tyagi, M., Allen, B.D., Demirel, M.C., Hopkins, P.E., “Tunable Thermal Transport and Reversible Thermal Conductivity Switching in Topologically-Networked Bio-Inspired Materials,” Nature Nanotechnology DOI: 10.1038/s41565-018-0227-7.