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Direct Synthesis of $MoS_{2}$ Nanosheets in Reduced Graphene Oxide Nanoscroll for Enhanced Photodetection
| Content Provider | MDPI |
|---|---|
| Author | Wu, Zhikang Li, Feifei Li, Xiya Yang, Yang Huang, Xiao Li, Hai |
| Copyright Year | 2022 |
| Description | Due to their unique tubular and spiral structure, graphene and graphene oxide nanoscrolls (GONS) have shown extensive applications in various fields. However, it is still a challenge to improve the optoelectronic application of graphene and GONS because of the zero bandgap of graphene. Herein, ammonium tetrathiomolybdate $((NH_{4})_{2}MoS_{4}$) was firstly wrapped into the $((NH_{4})_{2}MoS_{4}$@GONS) by molecular combing the mixture of $(NH_{4})_{2}MoS_{4}$ and GO solution on hydrophobic substrate. After thermal annealing, the $(NH_{4})_{2}MoS_{4}$ and GO were converted to $MoS_{2}$ nanosheets and reduced GO (RGO) simultaneously, and, thus, the $MoS_{2}$@RGONS was obtained. Raman spectroscopy and high-resolution transmission electron microscopy were used to confirm the formation of $MoS_{2}$ nanosheets among the RGONS. The amount of $MoS_{2}$ wrapped in RGONS increased with the increasing height of GONS, which is confirmed by the atomic force microscopy and Raman spectroscopy. The as-prepared $MoS_{2}$@RGONS showed much better photoresponse than the RGONS under visible light. The photocurrent-to-dark current ratios of photodetectors based on $MoS_{2}$@RGONS are ~570, 360 and 140 under blue, red and green lasers, respectively, which are 81, 144 and 35 times of the photodetectors based on RGONS. Moreover, the $MoS_{2}$@RGONS-based photodetector exhibited good power-dependent photoresponse. Our work indicates that the $MoS_{2}$@RGONS is expected to be a promising material in the fields of optoelectronic devices and flexible electronics. |
| Starting Page | 1581 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12091581 |
| Journal | Nanomaterials |
| Issue Number | 9 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-06 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Analytical Chemistry Ammonium Tetrathiomolybdate Thermal Annealing Mos2@reduced Graphene Oxide Nanoscroll Photosensitivity Photodetection |
| Content Type | Text |
| Resource Type | Article |
