title: Integrated Freestanding Two-dimensional Transition Metal Dichalcogenides.
abstract: This paper reports on the integration of freestanding transition metal dichalcogenides (TMDs). Monolayer (1-L) MoS2, WS2, and WSe2as representative TMDs are transferred on ZnO nanorods (NRs), used here as nanostructured substrates. The photoluminescence (PL) spectra of 1-L TMDs on NRs show a giant PL intensity enhancement, compared with those of 1-L TMDs on SiO2. The strong increases in Raman and PL intensities, along with the characteristic peak shifts, confirm the absence of stress in the TMDs on NRs. In depth analysis of the PL emission also reveals that the ratio between the exciton and trion peak intensity is almost not modified after transfer. The latter shows that the effect of charge transfer between the 1-L TMDs and ZnO NRs is here negligible. Furthermore, confocal PL and Raman spectroscopy reveal a fairly consistent distribution of PL and Raman intensities. These observations are in agreement with a very limited points contact between the support and the 1-L TMDs. The entire process reported here is scalable and may pave the way for the development of very efficient ultrathin optoelectronics.
authors.affiliation: Laboratoire de Nanotechnologie et d'Instrumentation Optique, Institut Charles Delaunay, CNRS-UMR 6281, Université de Technologie de Troyes, BP 2060, 10010, Troyes, France.
authors.forename: Hyun
authors.initials: H
authors.lastname: Jeong
authors.affiliation: Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
authors.forename: Hye Min
authors.initials: HM
authors.lastname: Oh
authors.affiliation: Laboratoire de Nanotechnologie et d'Instrumentation Optique, Institut Charles Delaunay, CNRS-UMR 6281, Université de Technologie de Troyes, BP 2060, 10010, Troyes, France.
authors.forename: Anisha
authors.initials: A
authors.lastname: Gokarna
authors.affiliation: Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
authors.forename: Hyun
authors.initials: H
authors.lastname: Kim
authors.affiliation: Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
authors.forename: Seok Joon
authors.initials: SJ
authors.lastname: Yun
authors.affiliation: Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
authors.forename: Gang Hee
authors.initials: GH
authors.lastname: Han
authors.affiliation: Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
authors.forename: Mun Seok
authors.initials: MS
authors.lastname: Jeong
authors.affiliation: Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
authors.forename: Young Hee
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Laboratoire de Nanotechnologie et d'Instrumentation Optique, Institut Charles Delaunay, CNRS-UMR 6281, Université de Technologie de Troyes, BP 2060, 10010, Troyes, France.|Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
authors.forename: Gilles
authors.initials: G
authors.lastname: Lerondel
keywords: Raman scattering; nanorods; photoluminescence; strain; transition metal dichalcogenides