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Uniform and Conformal Carbon Nanofilms Produced Based on Molecular Layer Deposition
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan 030001, China
University of Chinese Academy of Sciences, Beijing 100039, China
Key Laboratory of Chinese Education Ministry for Tropical Biological Resources, Hainan University, Haikou 570228, China
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
* Author to whom correspondence should be addressed.
Received: 3 November 2013; in revised form: 12 November 2013 / Accepted: 25 November 2013 / Published: 2 December 2013
Abstract: Continuous and uniform carbon nanofilms (CNFs) are prepared by pyrolysis of polyimide films which are produced by molecular layer deposition (MLD). The film thickness can be easily controlled at nanometer scale by altering the cycle numbers. During the annealing process at 600 °C, the polyimide film is subject to shrinkage of 70% in thickness. The obtained CNFs do not exhibit a well-graphitized structure due to the low calcination temperature. No clear pore structures are observed in the produced films. CNFs grown on a glass substrate with a thickness of about 1.4 nm shows almost 98% optical transmittance in the visible spectrum range. Au nanoparticles coated with CNFs are produced by this method. Carbon nanotubes with uniform wall thickness are obtained using anodic aluminum oxide as a template by depositing polyimide films into its pores. Our results demonstrate that this method is very effective to coat conformal and uniform CNFs on various substrates, such as nanoparticles and porous templates, to produce functional composite nanomaterials.
Keywords: carbon nanofilm; molecular layer deposition; polyimide; pyrolysis
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MDPI and ACS Style
Yang, P.; Wang, G.; Gao, Z.; Chen, H.; Wang, Y.; Qin, Y. Uniform and Conformal Carbon Nanofilms Produced Based on Molecular Layer Deposition. Materials 2013, 6, 5602-5612.
Yang P, Wang G, Gao Z, Chen H, Wang Y, Qin Y. Uniform and Conformal Carbon Nanofilms Produced Based on Molecular Layer Deposition. Materials. 2013; 6(12):5602-5612.
Yang, Peng; Wang, Guizhen; Gao, Zhe; Chen, He; Wang, Yong; Qin, Yong. 2013. "Uniform and Conformal Carbon Nanofilms Produced Based on Molecular Layer Deposition." Materials 6, no. 12: 5602-5612.