Shape-Adaptable 2D Titanium Carbide (MXene) Heater

Tae Hyun Park, Seunggun Yu, Min Koo, Hyerim Kim, Eui Hyuk Kim, Jung Eun Park, Byeori Ok, Byeonggwan Kim, Sung Hyun Noh, Chanho Park, Eunkyoung Kim, Chong Min Koo, Cheolmin Park

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Prior to the advent of the next-generation heater for wearable/on-body electronic devices, various properties are required, including conductivity, transparency, mechanical reliability, and conformability. Expansion to two-dimensional (2D) structure of metallic nanowires based on network- and mesh-type geometries has been widely exploited for realizing these heaters. However, the routes led to many drawbacks such as the low-density cross-bar linking, self-aggregation of wire, and high junction resistance. Although 2D carbon nanomaterials such as graphene and reduced graphene oxide (rGO) have shown their potentials for the purpose, CVD-grown graphene with sufficiently high conductivity was limited due to its poor processability for large-area applications, while rGO fabricated with a complex reduction process involving the use of toxic chemicals suffered from a low electrical conductivity. In this study, we demonstrate a simple and robust process, utilizing electrostatic assembling of negatively charged MXene flakes on a positively treated surface of substrate, for fabricating a metal-like 2D MXene thin film heater (TFH). Our TFH showed a high optical property (>65%), low sheet resistance (215 ω/sq), fast electrothermal response (within dozens of seconds) with an intrinsically high electrical conductivity, and mechanical flexibility (up to 180° bending). Its capability for forming a firm and stable ionic-type interface with a counterpart surface allows us to develop a shape-adaptable and patchable thread heater (TH) that can be shaped on diverse substrates even under harsh conditions of conventional sewing or weaving processes. This work suggests that our shape-adaptable MXene heaters are potentially suitable not only for wearable devices for local heating and defrosting but also for a variety of emerging applications of soft actuators and wearable/flexible healthcare monitoring and thermotherapy.

Original languageEnglish
JournalACS Nano
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • sewable fiber heater
  • shape-adaptable heater
  • solution-processed MXene
  • thin-film heater
  • thread heater
  • two-dimensional nanomaterials

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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    Park, T. H., Yu, S., Koo, M., Kim, H., Kim, E. H., Park, J. E., Ok, B., Kim, B., Noh, S. H., Park, C., Kim, E., Koo, C. M., & Park, C. (2019). Shape-Adaptable 2D Titanium Carbide (MXene) Heater. ACS Nano. https://doi.org/10.1021/acsnano.9b01602