Heating-up Synthesis of MoS2 Nanosheets and Their Electrical Bistability Performance.

Xu Li,Feng Teng,Aiwei Tang,Jiantao Li,Guoyi Dong,Li Guan

doi:10.1186/s11671-016-1385-x

Xu Li, Feng Teng + Show 4 more

Open Access

https://doi.org/10.1186/s11671-016-1385-x

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Abstract

Molybdenum disulfide (MoS2) nanosheets were synthesized by using a simple heating-up approach, in which 1-dodecanethiol (DDT) was used not only as a sulfur source but also as the surface ligand. The sheet-like morphology was confirmed by the transmission electron microscopy (TEM) and atomic force microscopy (AFM) results, and the X-ray diffraction (XRD) patterns and Raman spectrum were employed to characterize the structure of the as-synthesized MoS2 nanosheets. The as-obtained MoS2 nanosheets blending with a polymer could be used to fabricate an electrically bistable device through a simple spin-coating method, and the device exhibited an obvious electrical bistability in the I-V curve. The charge transport of the device was discussed based on the organic electronic models.

Highlights

In the past few decades, much attention has been paid to the two-dimensional (2D) nanomaterials due to their surprising unique physical, electrical, and chemical properties arising from high surface area and quantum confinement effects in two dimensions [1,2,3]
The atomic ratio of S to Mo is estimated to be 2.6:1 based on the X-ray photoelectron spectroscopic (XPS) results, which is higher than the stoichiometric ratio of MoS2, which may arise from the capping ligand of DDT
In summary, a simple heating-up colloidal approach was developed to prepare MoS2 nanosheets, which was synthesized in DDT and non-coordinating solvent

Summary

Introduction

In the past few decades, much attention has been paid to the two-dimensional (2D) nanomaterials due to their surprising unique physical, electrical, and chemical properties arising from high surface area and quantum confinement effects in two dimensions [1,2,3]. Different synthetic approaches including chemical vapor deposition [10, 11], ion-intercalation and exfoliation [12, 13], and colloidal chemical synthesis [14, 15] have been developed for synthesis of TMDCs. Till different synthetic approaches including chemical vapor deposition [10, 11], ion-intercalation and exfoliation [12, 13], and colloidal chemical synthesis [14, 15] have been developed for synthesis of TMDCs Among these different synthetic methods, colloidal chemical synthesis is widely used in the preparation of ultrathin 2D nanomaterials. It is interesting to develop a simple heating-up (non-injection) method to prepare molybdenum disulfide (MoS2) nanosheets, which is reliable and does not need any injection and pre-synthesis of precursors

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