title: Ten-gram scale SiC@SiO2nanowires: high-yield synthesis towards industrialization, in situ growth mechanism and their peculiar photoluminescence and electromagnetic wave absorption properties.
abstract: SiC@SiO2nanowires, as a functional nanocomposite, have attracted widespread attention due to their fascinating performance and broad application prospect. However, the low-cost, high yield preparation of large-scale SiC@SiO2nanowires is still a bottleneck, which hinders their industrial application. Herein, a carbothermal reduction strategy has been developed to synthesize SiC@SiO2nanowires, which breaks through the handicap of the traditional growth pattern that uses the aid of a substrate. Systematic characterization results illustrate that the yield of the as-obtained products greatly depends on the heating rate, and ten-gram scale SiC@SiO2nanowires (∼27.2 g) composed of a cubic β-SiC core and homogeneous amorphous SiO2coating are achieved under the optimum process parameters. The in situ mechanisms of expansion-insertion-growth and inhibition of expansion-package-obstruction are proposed to rationally interpret the growth process of SiC@SiO2nanowires and the effect of various heating rates, respectively. Furthermore, the SiC@SiO2nanowires display violet-blue photoluminescence and electromagnetic wave absorption properties. This study not only provides some beneficial suggestions for the commercial production of SiC@SiO2nanowires, but also reveals promising applications of SiC@SiO2nanowires in the optical and electromagnetic shielding fields. Moreover, the developed novel in situ growth mechanism enriches the growth theory of one-dimension nanomaterials and offers inspiration for their industrial-scale production.
authors.affiliation: Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial, College of Electromechanical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, P. R. China. 1984_jiankun_007@163.com.
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Li
authors.affiliation: Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial, College of Electromechanical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, P. R. China. 1984_jiankun_007@163.com.
authors.forename: H Y
authors.initials: HY
authors.lastname: Yu
authors.affiliation: Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial, College of Electromechanical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, P. R. China. 1984_jiankun_007@163.com.
authors.forename: G Y
authors.initials: GY
authors.lastname: Song
authors.affiliation: Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial, College of Electromechanical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, P. R. China. 1984_jiankun_007@163.com.
authors.forename: J
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial, College of Electromechanical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, P. R. China. 1984_jiankun_007@163.com.
authors.forename: H
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial, College of Electromechanical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, P. R. China. 1984_jiankun_007@163.com.
authors.forename: M
authors.identifier: http://orcid.org/0000-0002-8641-1913
authors.initials: M
authors.lastname: Zhang
authors.affiliation: State Key Laboratory Base of Eco-chemical Engineering, School of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province 266042, China. alanmengqust@163.com.
authors.forename: A L
authors.initials: AL
authors.lastname: Meng
authors.affiliation: Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial, College of Electromechanical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, P. R. China. 1984_jiankun_007@163.com.
authors.forename: Q D
authors.initials: QD
authors.lastname: Li