Low-temperature growth and direct transfer of graphene-graphitic carbon films on flexible plastic substrates
- Kim, Yong-Jin; Kim, Sang Jin; Jung, Myung Hee; Choi, Kwang Yeol; Bae, Sukang; Lee, Seoung-Ki; Lee, Youngbin; Shin, Dolly; Lee, Bora; Shin, Huiyoun; Choi, Myungshin; Park, Kyuho; Ahn, Jong-Hyun; Hong, Byung Hee
- Issue Date
- Nanotechnology, Vol.23 No.34, p. 344016
- We demonstrate low-temperature growth and direct transfer of graphene-graphitic carbon films (G-GC) onto plastic substrates without the use of supporting materials. In this approach, G-GC films were synthesized on copper layers by using inductively coupled plasma enhanced chemical vapor deposition, enabling the growth of few-layer graphene (G) on top of Cu and the additional growth of graphitic carbon (GC) films above the graphene layer at temperatures as low as 300 degrees C. The patterned G-GC films are not easily damaged or detached from the polymer substrates during the wet etching and transfer process because of the van der Waals forces and pi-pi interactions between the films and the substrates. Raman spectroscopy reveals the two-dimensional hexagonal lattice of carbon atoms and the crystallinity of the G-GC films. The optical transparency and sheet resistance of the G-GC films are controlled by modulating the film thickness. Strain sensors are successfully fabricated on plastic substrates, and their resistance modulation at different strains is investigated.
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