title: Aligned Si(3)N(4)@SiO(2) coaxial nanocables derived from a polymeric precursor.
abstract: Well-aligned coaxial nanocables, composed of a crystalline alpha-Si(3)N(4) inner core and amorphous SiO(2) outer shell, were prepared on silicon substrates by pyrolysis of a preceramic polymer (perhydropolysilazane) with iron as catalyst. The nanocables have high density, and the longest nanocable can be up to millimeters. Photoluminescence measurement reveals a strong ultraviolet emission band centered at 360 nm and a weaker visible-light emission at 625 nm. The growth mechanism of the nanocables is discussed in detail.
authors.affiliation: Faculty of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China. xiulifu@bupt.edu.cn
authors.forename: Xiuli
authors.initials: X
authors.lastname: Fu
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Peng
authors.forename: Na
authors.initials: N
authors.lastname: Zhu
authors.forename: Chengbiao
authors.initials: C
authors.lastname: Wang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Fu
authors.forename: Longhao
authors.initials: L
authors.lastname: Qi
authors.forename: Hezhuo
authors.initials: H
authors.lastname: Miao