Metallic Contact between MoS2 and Ni via Au Nanoglue. Issue 22 (24th April 2018)

• Record Type: Journal Article
• Authors: Shi, Xinying; Posysaev, Sergei; Huttula, Marko; Pankratov, Vladimir; Hoszowska, Joanna; Dousse, Jean‐Claude; Zeeshan, Faisal; Niu, Yuran; Zakharov, Alexei; Li, Taohai; Miroshnichenko, Olga; Zhang, Meng; Wang, Xiao; Huang, Zhongjia; Saukko, Sami; González, Diego López; van Dijken, Sebastiaan; Alatalo, Matti; Cao, Wei
• Is Part Of: Small. Volume 14:Issue 22(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-04-24
• Subjects: first‐principles calculations -- inorganic layered crystals -- metal‐semiconductor contact -- synchrotron radiation; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201704526
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: A critical factor for electronics based on inorganic layered crystals stems from the electrical contact mode between the semiconducting crystals and the metal counterparts in the electric circuit. Here, a materials tailoring strategy via nanocomposite decoration is carried out to reach metallic contact between MoS2 matrix and transition metal nanoparticles. Nickel nanoparticles (NiNPs) are successfully joined to the sides of a layered MoS2 crystal through gold nanobuffers, forming semiconducting and magnetic NiNPs@MoS2 complexes. The intrinsic semiconducting property of MoS2 remains unchanged, and it can be lowered to only few layers. Chemical bonding of the Ni to the MoS2 host is verified by synchrotron radiation based photoemission electron microscopy, and further proved by first‐principles calculations. Following the system's band alignment, new electron migration channels between metal and the semiconducting side contribute to the metallic contact mechanism, while semiconductor–metal heterojunctions enhance the photocatalytic ability. Abstract : Metallic contact is realized between nickel and MoS2 via gold nanoglue, providing semiconducting and ferromagnetic Ni@MoS2 complexes with wide application prospects. Chemical bonding in the ternary system is confirmed by simultaneous microscopic and spectroscopic determinations given by X‐ray photoemission electron microscopy. First‐principles results reveal the forming geometry and derive the band alignment.