Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids
Modulated continuous wave (CW) lasers cause photothermal effect that leads to rapid optical absorption and generation of thermal waves around the irradiated nanostructures. In this work, we examined the effect of modulated CW laser irradiation on the particle fragmentation process to enhance the the...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/81698/1/Photothermal%20effect%20of%20modulating%20laser%20irradiation%20on%20the%20thermal%20diffusivity%20of%20Al2O3%20nanofluids.pdf |
| _version_ | 1825951480636506112 |
|---|---|
| author | Noroozi, Monir Mohammadi, Bijan Radiman, Shahidan Zakaria, Azmi Azis, Raba’ah Syahidah |
| author_facet | Noroozi, Monir Mohammadi, Bijan Radiman, Shahidan Zakaria, Azmi Azis, Raba’ah Syahidah |
| author_sort | Noroozi, Monir |
| collection | UPM |
| description | Modulated continuous wave (CW) lasers cause photothermal effect that leads to rapid optical absorption and generation of thermal waves around the irradiated nanostructures. In this work, we examined the effect of modulated CW laser irradiation on the particle fragmentation process to enhance the thermal diffusivity of nanofluids. A facile and cost-effective diode laser was applied to reduce the agglomerated size of Al2O3 nanoparticles in deionized water. The thermal wave generation, which was determined by the modulated frequency of the laser beam and the optical and thermal properties of the nanofluid, is also briefly discussed and summarized. The influence of laser irradiation time on nanoparticle sizes and their size distribution was determined by dynamic light scattering and transmission electron microscopy. The thermal diffusivity of the nanofluid was measured using the photopyroelectric method. The data obtained showed that the modulated laser irradiation caused the partial fragmentation of some agglomerated particles in the colloids, with an average diameter close to the original particle size, as indicated by a narrow distribution size. The reduction in the agglomerated size of the particles also resulted in an enhancement of the thermal diffusivity values, from 1.444 × 10ˉ³ to 1.498 × 10ˉ³ cm2/s in 0 to 30 min of irradiation time. This work brings new possibilities and insight into the fragmentation of agglomerated nanomaterials based on the photothermal study. |
| first_indexed | 2024-03-06T10:30:36Z |
| format | Article |
| id | upm.eprints-81698 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T10:30:36Z |
| publishDate | 2019 |
| publisher | SpringerOpen |
| record_format | dspace |
| spelling | upm.eprints-816982020-10-09T03:33:10Z http://psasir.upm.edu.my/id/eprint/81698/ Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids Noroozi, Monir Mohammadi, Bijan Radiman, Shahidan Zakaria, Azmi Azis, Raba’ah Syahidah Modulated continuous wave (CW) lasers cause photothermal effect that leads to rapid optical absorption and generation of thermal waves around the irradiated nanostructures. In this work, we examined the effect of modulated CW laser irradiation on the particle fragmentation process to enhance the thermal diffusivity of nanofluids. A facile and cost-effective diode laser was applied to reduce the agglomerated size of Al2O3 nanoparticles in deionized water. The thermal wave generation, which was determined by the modulated frequency of the laser beam and the optical and thermal properties of the nanofluid, is also briefly discussed and summarized. The influence of laser irradiation time on nanoparticle sizes and their size distribution was determined by dynamic light scattering and transmission electron microscopy. The thermal diffusivity of the nanofluid was measured using the photopyroelectric method. The data obtained showed that the modulated laser irradiation caused the partial fragmentation of some agglomerated particles in the colloids, with an average diameter close to the original particle size, as indicated by a narrow distribution size. The reduction in the agglomerated size of the particles also resulted in an enhancement of the thermal diffusivity values, from 1.444 × 10ˉ³ to 1.498 × 10ˉ³ cm2/s in 0 to 30 min of irradiation time. This work brings new possibilities and insight into the fragmentation of agglomerated nanomaterials based on the photothermal study. SpringerOpen 2019 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/81698/1/Photothermal%20effect%20of%20modulating%20laser%20irradiation%20on%20the%20thermal%20diffusivity%20of%20Al2O3%20nanofluids.pdf Noroozi, Monir and Mohammadi, Bijan and Radiman, Shahidan and Zakaria, Azmi and Azis, Raba’ah Syahidah (2019) Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids. Nanoscale Research Letters, 14 (37). pp. 1-10. ISSN 1931-7573; ESSN: 1556-276X https://link.springer.com/article/10.1186/s11671-019-2869-2 10.1186/s11671-019-2869-2 |
| spellingShingle | Noroozi, Monir Mohammadi, Bijan Radiman, Shahidan Zakaria, Azmi Azis, Raba’ah Syahidah Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids |
| title | Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids |
| title_full | Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids |
| title_fullStr | Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids |
| title_full_unstemmed | Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids |
| title_short | Photothermal effect of modulating laser irradiation on the thermal diffusivity of Al2O3 nanofluids |
| title_sort | photothermal effect of modulating laser irradiation on the thermal diffusivity of al2o3 nanofluids |
| url | http://psasir.upm.edu.my/id/eprint/81698/1/Photothermal%20effect%20of%20modulating%20laser%20irradiation%20on%20the%20thermal%20diffusivity%20of%20Al2O3%20nanofluids.pdf |
| work_keys_str_mv | AT noroozimonir photothermaleffectofmodulatinglaserirradiationonthethermaldiffusivityofal2o3nanofluids AT mohammadibijan photothermaleffectofmodulatinglaserirradiationonthethermaldiffusivityofal2o3nanofluids AT radimanshahidan photothermaleffectofmodulatinglaserirradiationonthethermaldiffusivityofal2o3nanofluids AT zakariaazmi photothermaleffectofmodulatinglaserirradiationonthethermaldiffusivityofal2o3nanofluids AT azisrabaahsyahidah photothermaleffectofmodulatinglaserirradiationonthethermaldiffusivityofal2o3nanofluids |