文献类型：期刊文献

英文题名：Metallic Contact between MoS2 and Ni via Au Nanoglue

作者：Shi, Xinying[1];Posysaev, Sergei[1];Huttula, Marko[1];Pankratov, Vladimir[1];Hoszowska, Joanna[2];Dousse, Jean-Claude[2];Zeeshan, Faisal[2];Niu, Yuran[3];Zakharov, Alexei[3];Li, Taohai[4];Miroshnichenko, Olga[1];Zhang, Meng[5];Wang, Xiao[5];Huang, Zhongjia[6];Saukko, Sami[7];Gonzalez, Diego Lopez[8];van Dijken, Sebastiaan[8];Alatalo, Matti[1];Cao, Wei[1]

机构：[1]Univ Oulu, Nano & Mol Syst Res Unit, POB 3000, FI-90014 Oulu, Finland;[2]Univ Fribourg, Dept Phys, Ch Musee 3, CH-1700 Fribourg, Switzerland;[3]Lund Univ, MAX Lab 4, POB 118, S-22100 Lund, Sweden;[4]Xiangtan Univ, Coll Chem, Key Lab Environm Friendly Chem & Applicat, Minist Educ, Xiangtan 411105, Peoples R China;[5]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[6]Anhui Polytech Univ, Sch Mech & Automot Engn, Wuhu 241000, Peoples R China;[7]Univ Oulu, Ctr Microscopy & Nanotechnol, POB 7150, FI-90014 Oulu, Finland;[8]Aalto Univ, Sch Sci, Dept Appl Phys, NanoSpin, POB 15100, FI-00076 Aalto, Finland

年份：2018

卷号：14

期号：22

外文期刊名：SMALL

收录：;EI(收录号：20181705108074);WOS:【SCI-EXPANDED(收录号:WOS:000434174300009)】；

基金：The authors acknowledge financial support from Strategic Grant of University of Oulu, Academy of Finland, National Natural Science Foundation of China (Grant No. 11204079), and the Natural Science Foundation of Shanghai (Grant No. 12ZR1407000). W.C. and M.H. acknowledge the European Regional Development Funding and the Oulu Council. X.S. acknowledges the scholarship sponsored by China Scholarship Council. J.H., J.-Cl.D., and F.Z. acknowledge the financial support of the Swiss National Science Foundation (Grant No. 200020_146739). The authors thank the Center of Microscopy and Nanotechnology of University of Oulu. Computing resources were provided by CSC - IT Centre for Science Ltd. The research leading to these results has received funding from the European Commission's Seventh Framework Programme (FP7/2007-2013) CALIPSO under Grant Agreement No. 312284. The authors thank also the crew of the MAX IV laboratory for their support during the beamtime operation.

语种：英文

外文关键词：first-principles calculations; inorganic layered crystals; metal-semiconductor contact; synchrotron radiation

摘要：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.