title: Tailoring Carbon Nanostructure with Diverse and Tunable Morphology by the Pyrolysis of Self-Assembled Lamellar Nanodomains of a Block Copolymer.
abstract: The pyrolysis of a block copolymer thin film, the free surface of which was in contact with air or a capping layer of SiO2, produced four carbon nanostructures. Thin films of a diblock copolymer having perpendicularly oriented lamellar nanodomains served as carbon and nitrogen precursors. Before pyrolysis, the lamellar nanodomains were cross-linked with UV irradiation under nitrogen gas (UVIN). Without a capping layer, pyrolysis caused a structural transformation from lamellar nanodomains to short carbon nanowires or to dropletlike nanocarbons in a row via Rayleigh instability, depending on the duration of pyrolysis. When capped with a layer of SiO2followed by pyrolysis, the lamellar nanodomains were converted to pod-like, spaghetti-like, or long worm-like carbon nanostructures. These carbon nanostructures were driven by controlling the surface or interface tension and the residual yield of solid carbonaceous species.
authors.affiliation: Department of Chemical and Materials Engineering, National Central University , Taoyuan 32001, Taiwan.
authors.forename: Ya-Sen
authors.identifier: 0000-0002-7480-0380
authors.initials: YS
authors.lastname: Sun
authors.affiliation: Department of Chemical and Materials Engineering, National Central University , Taoyuan 32001, Taiwan.
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Huang
authors.affiliation: Department of Chemical and Materials Engineering, National Central University , Taoyuan 32001, Taiwan.
authors.forename: Chien-Fu
authors.initials: CF
authors.lastname: Lin
authors.affiliation: Department of Chemical and Materials Engineering, National Central University , Taoyuan 32001, Taiwan.
authors.forename: Shao-Liang
authors.initials: SL
authors.lastname: Cheng