Multifunctional Macroassembled Graphene Nanofilms with High Crystallinity

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Li Peng
  • Meihui Wang
  • Xiaoxue Cao
  • Junfeng Gao
  • Yingjun Liu
  • Xianjue Chen
  • Bin Wang
  • Bo Wang
  • Chongyang Zhu
  • Xiao Wang
  • Ming Huang
  • Benjamin V. Cunning
  • Jintao Pang
  • Wendao Xu
  • Yibin Ying
  • Zhen Xu
  • Wenzhang Fang
  • Rodney S. Ruoff
  • Chao Gao

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2104195
Journal / PublicationAdvanced Materials
Volume33
Issue number49
Online published8 Oct 2021
Publication statusPublished - 9 Dec 2021

Abstract

A “cooling–contraction” method to separate large-area (up to 4.2 cm in lateral size) graphene oxide (GO)-assembled films (of nanoscale thickness) from substrates is reported. Heat treatment at 3000 °C of such free-standing macroscale films yields highly crystalline “macroassembled graphene nanofilms” (nMAGs) with 16–48 nm thickness. These nMAGs present tensile strength of 5.5–11.3 GPa (with ≈3 µm gauge length), electrical conductivity of 1.8–2.1 MS m−1, thermal conductivity of 2027–2820 W m−1 K−1, and carrier relaxation time up to ≈23 ps. As a demonstration application, an nMAG-based sound-generator shows a 30 µs response and sound pressure level of 89 dB at 1 W cm−2. A THz metasurface fabricated from nMAG has a light response of 8.2% for 0.159 W mm−2 and can detect down to 0.01 ppm of glucose. The approach provides a straightforward way to form highly crystallized graphene nanofilms from low-cost GO sheets.

Research Area(s)

  • graphene nanofilms, high crystallinity, macroassembly, terahertz sensors, thermoacoustic devices, HIGH-QUALITY, OXIDE, FILMS, TRANSPARENT, FABRICATION, GRAPHITE

Citation Format(s)

Multifunctional Macroassembled Graphene Nanofilms with High Crystallinity. / Li Peng, ; Han, Ying; Wang, Meihui et al.
In: Advanced Materials, Vol. 33, No. 49, 2104195, 09.12.2021.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review