Influence of Oxalic Acid Concentrations on The Growth of Molybdenum Disulfide via Spin Coating Technique
In this context, the molybdenum disulfide (MoS2) films were grown by spin coating technique and thermal vapour sulfurization (TVS) under the condition of different oxalic acid concentrations. Atomic force microscopy (AFM) surface topography shows the improved homogeneity and higher compactness of fi...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | http://eprints.usm.my/48996/ http://eprints.usm.my/48996/1/NG02_OP.pdf%20cut.pdf |
| _version_ | 1848881315090268160 |
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| author | Tan, A. L. Ng, S. S. Hassan, H. Abu |
| author_facet | Tan, A. L. Ng, S. S. Hassan, H. Abu |
| author_sort | Tan, A. L. |
| building | USM Institutional Repository |
| collection | Online Access |
| description | In this context, the molybdenum disulfide (MoS2) films were grown by spin coating technique and thermal vapour sulfurization (TVS) under the condition of different oxalic acid concentrations. Atomic force microscopy (AFM) surface topography shows the improved homogeneity and higher compactness of films with the increasing acid concentration. However, high concentration favoured the formation of larger grains and poor continuity of films. These observations were further proven by the particle size distribution profile. Apart from that, two
distinct Raman phonon modes of the MoS2 can be detected in all the deposited films. In addition, molybdenum dioxide (MoO2) was detected at higher acid concentration due to the slower rate of diffusion of sulfur atoms during the surface sulfurization. From the direct analysis of frequency difference between in-plane (E2g
1) and out-of-plane (A1g) phonon modes, it proves that
multilayers of MoS2 films were synthesized. Ultraviolet-visible (UV-Vis) specular reflectance results also reveal that crystallite MoS2 films with the absorption peaks of 612 nm and 660 nm were detected. |
| first_indexed | 2025-11-15T18:17:04Z |
| format | Conference or Workshop Item |
| id | usm-48996 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T18:17:04Z |
| publishDate | 2017 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-489962021-04-22T06:34:25Z http://eprints.usm.my/48996/ Influence of Oxalic Acid Concentrations on The Growth of Molybdenum Disulfide via Spin Coating Technique Tan, A. L. Ng, S. S. Hassan, H. Abu QC1-999 Physics In this context, the molybdenum disulfide (MoS2) films were grown by spin coating technique and thermal vapour sulfurization (TVS) under the condition of different oxalic acid concentrations. Atomic force microscopy (AFM) surface topography shows the improved homogeneity and higher compactness of films with the increasing acid concentration. However, high concentration favoured the formation of larger grains and poor continuity of films. These observations were further proven by the particle size distribution profile. Apart from that, two distinct Raman phonon modes of the MoS2 can be detected in all the deposited films. In addition, molybdenum dioxide (MoO2) was detected at higher acid concentration due to the slower rate of diffusion of sulfur atoms during the surface sulfurization. From the direct analysis of frequency difference between in-plane (E2g 1) and out-of-plane (A1g) phonon modes, it proves that multilayers of MoS2 films were synthesized. Ultraviolet-visible (UV-Vis) specular reflectance results also reveal that crystallite MoS2 films with the absorption peaks of 612 nm and 660 nm were detected. 2017 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.usm.my/48996/1/NG02_OP.pdf%20cut.pdf Tan, A. L. and Ng, S. S. and Hassan, H. Abu (2017) Influence of Oxalic Acid Concentrations on The Growth of Molybdenum Disulfide via Spin Coating Technique. In: The International Conference of Solid State Science and Technology (ICSSST 2017). |
| spellingShingle | QC1-999 Physics Tan, A. L. Ng, S. S. Hassan, H. Abu Influence of Oxalic Acid Concentrations on The Growth of Molybdenum Disulfide via Spin Coating Technique |
| title | Influence of Oxalic Acid Concentrations on The Growth of
Molybdenum Disulfide via Spin Coating Technique |
| title_full | Influence of Oxalic Acid Concentrations on The Growth of
Molybdenum Disulfide via Spin Coating Technique |
| title_fullStr | Influence of Oxalic Acid Concentrations on The Growth of
Molybdenum Disulfide via Spin Coating Technique |
| title_full_unstemmed | Influence of Oxalic Acid Concentrations on The Growth of
Molybdenum Disulfide via Spin Coating Technique |
| title_short | Influence of Oxalic Acid Concentrations on The Growth of
Molybdenum Disulfide via Spin Coating Technique |
| title_sort | influence of oxalic acid concentrations on the growth of
molybdenum disulfide via spin coating technique |
| topic | QC1-999 Physics |
| url | http://eprints.usm.my/48996/ http://eprints.usm.my/48996/1/NG02_OP.pdf%20cut.pdf |