Journal
MATERIALS
Volume 6, Issue 12, Pages 5602-5612Publisher
MDPI
DOI: 10.3390/ma6125602
Keywords
carbon nanofilm; molecular layer deposition; polyimide; pyrolysis
Categories
Funding
- Shanxi Scholarship Council of China [2013-152]
- National Natural Science Foundation of China [21173248, 21203229, 51362010, 21376256]
- State Key Laboratory of Coal Conversion of China [Y2BWLD1931, Y3BWLE1931]
- Chinese Academy of Sciences
- Shanxi Province
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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 degrees 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.
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