Phonon Transport within Periodic Porous Structures - From Classical Phonon Size Effects to Wave Effects

Yue Xiao, Qiyu Chen, Dengke Ma, Nuo Yang, Qing Hao

Research output: Contribution to journalReview articlepeer-review

27 Scopus citations


Tailoring thermal properties with nanostructured materials can be of vital importance for many applications. Generally classical phonon size effects are employed to reduce the thermal conductivity, where strong phonon scattering by nanostructured interfaces or boundaries can dramatically suppress the heat conduction. When these boundaries or interfaces are arranged in a periodic pattern, coherent phonons may have interference and modify the phonon dispersion, leading to dramatically reduced thermal conductivity. Such coherent phonon transport has been widely studied for superlattice films and recently emphasized for periodic nanoporous patterns. Although the wave effects have been proposed for reducing the thermal conductivity, more recent experimental evidence shows that such effects can only be critical at an ultralow temperature, i.e., around 10 K or below. At room temperature, the impacted phonons are mostly restricted to hypersonic modes that contribute little to the thermal conductivity. In this review, the theoretical and experimental studies of periodic porous structures are summarized and compared. The general applications of periodic nanostructured materials are further discussed.

Original languageEnglish (US)
Pages (from-to)2-18
Number of pages17
JournalES Materials and Manufacturing
StatePublished - Sep 2019


  • Classical phonon size effect
  • Coherence
  • Nanopore
  • Phononic crystal

ASJC Scopus subject areas

  • Building and Construction
  • Ceramics and Composites
  • Metals and Alloys
  • Polymers and Plastics
  • Applied Mathematics
  • Modeling and Simulation
  • Numerical Analysis


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