Tunable thermal transport and reversible thermal conductivity switching in topologically networked bio-inspired materials

John A. Tomko, Abdon Pena-Francesch, Huihun Jung, Madhusudan Tyagi, Benjamin D. Allen, Melik C. Demirel, Patrick E. Hopkins

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)959-964
Number of pages6
JournalNature nanotechnology
Volume13
Issue number10
DOIs
StatePublished - Oct 1 2018

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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