title: Direct growth of nanographene at low temperature from carbon black for highly sensitive temperature detectors.
abstract: Graphene has attracted tremendous research interest owing to its widespread potential applications. However, these applications are partially hampered by the lack of a general method to produce high-quality graphene at low cost. Here, to the best of our knowledge, we use low-cost solid carbon allotropes as the precursor in plasma-enhanced chemical vapor deposition (PECVD) for the first time, and find that the hydrogen plasma and reaction temperature play a crucial role in the process. Hydrogen plasma etches carbon black, and produces graphene crystals in a high-temperature zone. Based on this finding, a modified PECVD technology is developed, which produces transparent conductive nanographene films directly on various substrates at a temperature as low as 600 °C. For application, the closely packed structure of the nanographene film enables a remarkable temperature-dependent behavior of the resistance with a ratio higher than that previously reported, indicating its great potential for usage in highly sensitive temperature detectors.
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Ke
authors.initials: K
authors.lastname: Li
authors.forename: Zhi
authors.initials: Z
authors.lastname: Cai
authors.forename: Menglin
authors.initials: M
authors.lastname: Li
authors.forename: Donghua
authors.initials: D
authors.lastname: Liu
authors.forename: Min
authors.initials: M
authors.lastname: Cao
authors.forename: Dongyun
authors.initials: D
authors.lastname: Xia
authors.forename: Zhepeng
authors.initials: Z
authors.lastname: Jin
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang
authors.forename: Lan
authors.initials: L
authors.lastname: Dong
authors.forename: Xiangfan
authors.initials: X
authors.lastname: Xu
authors.forename: Dacheng
authors.initials: D
authors.lastname: Wei