Fabrication of Macroscopic-Tubular Graphene Architectures via Thermal Annealing Approach
Wei Cheng Lai1*, An T. Nguyen2, Duc Dung Nguyen2, Chia Chen Hsu1
1Department of Physics, National Chung Cheng University, Chiayi, Taiwan
2Department of Physics, Thai Nguyen University, Thai Nguyen, Viet Nam
* presenting author:Lai Wei-Cheng, email:boom78910@hotmail.com
Manipulation of individual graphene sheets/films into novel macroscopic architectures is highly important for practical uses and opening/exploring their new functions.1 In this study, macroscopic, freestanding, and tubular graphene (TG) architectures were fabricated via a versatile and robust method based on annealing of cellulose acetate on nickel templates. Specially, the TG architectures can be obtained as individual and woven tubes with a diameter of ~ 50 ┬Ám. The effect of experimental parameters such as annealing temperatures, cooling rates, and amount of carbon precursors (cellulose acetate) on the graphitic crystallinity, number of graphene layers, and graphene surface has been investigated and characterized by Raman spectroscopy, SEM, and UV-vis. spectroscopy.

Keywords: Graphene, Thermal Annealing, Raman, Transmittance