title: Functional polyelectrolyte nanospaced MoS2 multilayers for enhanced photoluminescence.
abstract: Molybdenum disulfide (MoS2) multilayers with functional polyelectrolyte nanospacing layers are presented. Taking advantage of the facile method of layer-by-layer (LbL) assembly, individual chemically exfoliated MoS2 layers are not only effectively isolated from interlayer coupling but also doped by functional polymeric layers. It is clearly demonstrated that MoS2 nanosheets separated by polymeric trilayers exhibit a much larger increase in photoluminescence (PL) as the number of layers is increased. The enhanced PL has been correlated to the ratio of excitons to trions with the type of polymeric spacers. Because uniform heterogeneous interfaces can be formed between various transition metal dichalcogenides and other soft materials, LbL assembly offers possibilities for further development in the solution-processable assemblies of two-dimensional materials.
authors.affiliation: Department of Chemistry and Department of Energy Engineering, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea.
authors.forename: Piljae
authors.initials: P
authors.lastname: Joo
authors.forename: Kiyoung
authors.initials: K
authors.lastname: Jo
authors.forename: Gwanghyun
authors.initials: G
authors.lastname: Ahn
authors.forename: Damien
authors.initials: D
authors.lastname: Voiry
authors.forename: Hu Young
authors.initials: HY
authors.lastname: Jeong
authors.forename: Sunmin
authors.initials: S
authors.lastname: Ryu
authors.forename: Manish
authors.initials: M
authors.lastname: Chhowalla
authors.forename: Byeong-Su
authors.initials: BS
authors.lastname: Kim
mesh_terms: D004220:Disulfides / Q000737:chemistry*; D004573:Electrolytes / Q000737:chemistry*; D049449:Luminescence; D008982:Molybdenum / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology; D011108:Polymers / Q000737:chemistry*
chemical_list: D004220:Disulfides; D004573:Electrolytes; D011108:Polymers; D008982:Molybdenum; C082964:molybdenum disulfide
keywords: MoS2; Two-dimensional materials; dopant; exciton; layer-by-layer assembly; photoluminescence