title: Hierarchical Self-Assembly of Cu7Te5Nanorods into Superstructures with Enhanced SERS Performance.
abstract: This paper reports a strategy to get self-assembly of Cu7Te5nanorods into hierarchical superstructures: the side-by-side self-assembly of nanorods into microscale one-dimensional (1D) nanowires (primary structure), the side-by-side alignments of the 1D nanowires into two-dimensional (2D) nanowire bundles (secondary structure), and the further rolling up of the 2D bundles into three-dimensional (3D) microtubes (tertiary structure). It was found that the oleylamine (OLA)/n-dodecanethiol (DDT) mixture as a binary capping agent was key to produce Cu7Te5nanorods in the quantum size regime with high monodispersity, and this was a prerequisite for their hierarchical self-assembly based on elaborate control of the solvent evaporation process. The obtained Cu7Te5microtube superstructures were used as SERS substrate and showed much stronger SERS enhancement than the as-prepared Cu7Te5nanorods before assembly. This was probably ascribed to the remarkably enhanced local electromagnetic field arising from the plasmon coupling of Cu7Te5nanorods in the well-assembled superstructures.
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.|State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University , Beijing 100084, China.
authors.forename: Jiaojiao
authors.initials: J
authors.lastname: Zheng
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.|Patent Examination Cooperation Hubei Center of The Patent Office , Wuhan 430205, China.
authors.forename: Baosong
authors.initials: B
authors.lastname: Dai
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Physics, Beihang University , Beijing 100191, China.
authors.forename: Jialong
authors.initials: J
authors.lastname: Liu
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.
authors.forename: Muwei
authors.initials: M
authors.lastname: Ji
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.
authors.forename: Jiajia
authors.initials: J
authors.lastname: Liu
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.
authors.forename: Yuanmin
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.
authors.forename: Meng
authors.initials: M
authors.lastname: Xu
authors.affiliation: Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing institute of Technology , Beijing 10081, China.
authors.forename: Jiatao
authors.identifier: http://orcid.org/0000-0001-7414-4902
authors.initials: J
authors.lastname: Zhang
keywords: Cu7Te5 nanorods; SERS; hierarchical superstructures; local electromagnetic field; plasmon coupling; self-assembly