Temperature-Responsive Ultrasonic-Wave Engineering Using Thermoresponsive Polymers

Sang Jun Lee, Haunmin Lee, Dahyun Daniel Lim, Chanho Song, Wonjoon Choi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Artificial structures for controlling ultrasonic-waves are attractive for developing superb functions in sensing-imaging techniques. However, the complicated fabrication and fixed design associated with the particular wave limit the scalability. Herein, a versatile-reversible ultrasonic-wave engineering using programmable heating of local areas on thermoresponsive polymers is presented. As an abrupt shift of the elastic modulus occurs at selectively heated zones over the glass transition temperature, the drastic modulus change alters the S0 phase velocity of the Lamb wave within ultrasonic waves passing through the heated regimes. The modified wave propagation results in an active wavelength shift and wave refraction, which enables multifunctional programming of wave propagation pathways and wavefront shapes. Multiple functions such as reduced wavelength, wave steering, energy focusing and bifurcation are implemented in one nylon 6 thermoresponsive polymer, according to predesigned heating shapes. This work demonstrates the capability of temperature-responsive wave engineering in bulk solid media with only a heating configuration.

Original languageEnglish
Article number2104042
JournalAdvanced Functional Materials
Volume31
Issue number43
DOIs
Publication statusPublished - 2021 Oct 20

Bibliographical note

Funding Information:
S.J.L. and H.L. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science and ICT) (Nos. 2019R1A2C2085583, 2020R1A5A1018153, and 2017M1A2A2044986).

Publisher Copyright:
© 2021 Wiley-VCH GmbH

Keywords

  • temperature control
  • temperature-responsive functions
  • thermoacoustic simulations
  • thermoresponsive polymers
  • ultrasonic wave engineering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • General Chemistry
  • General Materials Science
  • Electrochemistry
  • Biomaterials

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