Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications
This work highlights the potential of random lasers as thermal laser-based sensor at room temperature within the uv-range. The work includes synthesis of zno nanorods, doping the zno, measuring the lasing, and laser-based sensing parameters. The zno nanorods were synthesized on glass substrate using...
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2024
|
| Subjects: | |
| Online Access: | http://eprints.usm.my/62636/ http://eprints.usm.my/62636/1/24%20Pages%20from%20ATIQAH%20NABIEHA%20BINTI%20AZMI.pdf |
| _version_ | 1848885038903459840 |
|---|---|
| author | Azmi, Atiqah Nabieha |
| author_facet | Azmi, Atiqah Nabieha |
| author_sort | Azmi, Atiqah Nabieha |
| building | USM Institutional Repository |
| collection | Online Access |
| description | This work highlights the potential of random lasers as thermal laser-based sensor at room temperature within the uv-range. The work includes synthesis of zno nanorods, doping the zno, measuring the lasing, and laser-based sensing parameters. The zno nanorods were synthesized on glass substrate using chemical bath deposition (cbd) method for three hours at 96 °c and revealed an average nanorod height and diameter of 1200 nm and 176 nm, respectively. Al dopant is then introduced to the zno nanorods by dipping technique. To start, a broad range of al dopant concentrations (10 mm - 70 mm) at fixed doping duration of 100 s was investigated. The average height of zno nanorods decreased with increasing concentration of al due to the acidity of the doping solution. As a result, only zno doped with 10 mm concentration showed random lasing emission at a threshold of 17.83 mj/cm2 with a spectral width of 1.66 nm. Based on these results, doping duration (0 s to 80 s) was varied for a fixed concentration of 10 mm. A gradual increase of al % was observed and the average zno nanorods diameter did not change significantly with increasing doping duration (± 14 nm). All samples showed random lasing emission and zno nanorods doped for 40 s with 1.19 % of al showed lowest lasing threshold of 12.48 mj/cm2 with a spectral width of 1.76 nm. Finally, thermal laser nano-sensing were investigated. Zno nanorods doped for 60 s revealed a sensitivity as low as 0.001 c-1. In conclusion, zno doped for 40 s showed the best random lasing threshold and zno doped for 60 s showed the best sensing properties due to a narrower linewidth. |
| first_indexed | 2025-11-15T19:16:15Z |
| format | Thesis |
| id | usm-62636 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T19:16:15Z |
| publishDate | 2024 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-626362025-07-18T08:53:13Z http://eprints.usm.my/62636/ Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications Azmi, Atiqah Nabieha QC1 Physics (General) This work highlights the potential of random lasers as thermal laser-based sensor at room temperature within the uv-range. The work includes synthesis of zno nanorods, doping the zno, measuring the lasing, and laser-based sensing parameters. The zno nanorods were synthesized on glass substrate using chemical bath deposition (cbd) method for three hours at 96 °c and revealed an average nanorod height and diameter of 1200 nm and 176 nm, respectively. Al dopant is then introduced to the zno nanorods by dipping technique. To start, a broad range of al dopant concentrations (10 mm - 70 mm) at fixed doping duration of 100 s was investigated. The average height of zno nanorods decreased with increasing concentration of al due to the acidity of the doping solution. As a result, only zno doped with 10 mm concentration showed random lasing emission at a threshold of 17.83 mj/cm2 with a spectral width of 1.66 nm. Based on these results, doping duration (0 s to 80 s) was varied for a fixed concentration of 10 mm. A gradual increase of al % was observed and the average zno nanorods diameter did not change significantly with increasing doping duration (± 14 nm). All samples showed random lasing emission and zno nanorods doped for 40 s with 1.19 % of al showed lowest lasing threshold of 12.48 mj/cm2 with a spectral width of 1.76 nm. Finally, thermal laser nano-sensing were investigated. Zno nanorods doped for 60 s revealed a sensitivity as low as 0.001 c-1. In conclusion, zno doped for 40 s showed the best random lasing threshold and zno doped for 60 s showed the best sensing properties due to a narrower linewidth. 2024-05 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/62636/1/24%20Pages%20from%20ATIQAH%20NABIEHA%20BINTI%20AZMI.pdf Azmi, Atiqah Nabieha (2024) Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications. PhD thesis, Perpustakaan Hamzah Sendut. |
| spellingShingle | QC1 Physics (General) Azmi, Atiqah Nabieha Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications |
| title | Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications |
| title_full | Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications |
| title_fullStr | Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications |
| title_full_unstemmed | Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications |
| title_short | Fabrication And Investigation Of Al-Doped Zno Nanorods For Laser-Based Temperature Sensor Applications |
| title_sort | fabrication and investigation of al-doped zno nanorods for laser-based temperature sensor applications |
| topic | QC1 Physics (General) |
| url | http://eprints.usm.my/62636/ http://eprints.usm.my/62636/1/24%20Pages%20from%20ATIQAH%20NABIEHA%20BINTI%20AZMI.pdf |