Torsional Actuator Powered by Environmental Energy Harvesting from Diurnal Temperature Variation

Dongseok Suh, Thuy Kieu Truong, Daniel G. Suh, Seong Chu Lim

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Inspired by phase-change technology storing thermal energy in the form of latent heat, direct conversion of environmental temperature variation into a useful form of mechanical work is achieved using the drastic volume change of a phase-change material during solid-liquid phase transformation. A twisted carbon nanotube yarn in combination with a phase-change material functions as a backbone of torsional actuator, powered by the change of environmental temperature, because nanopores among carbon nanotubes or their bundles are completely filled with the phase-change material. By the proper selection of infiltrated material whose melting temperature lies within a diurnal temperature range, this hybrid yarn can be applied in an autonomous system using naturally abundant low-grade thermal energy flow.

Original languageEnglish
Pages (from-to)6647-6652
Number of pages6
JournalACS Sustainable Chemistry and Engineering
Issue number12
StatePublished - 5 Dec 2016

Bibliographical note

Funding Information:
This paper was supported by Sungkyun Research Fund, Sungkyunkwan University, 2013

Publisher Copyright:
© 2016 American Chemical Society.


  • Carbon nanotube yarn
  • Diurnal temperature variation energy harvesting
  • Environmental energy harvesting
  • Phase-change material
  • Torsional actuation


Dive into the research topics of 'Torsional Actuator Powered by Environmental Energy Harvesting from Diurnal Temperature Variation'. Together they form a unique fingerprint.

Cite this