Temperature Variations of Gold Nanoparticle and Dynamics of Plasmonic Bubble in Water Under Nanosecond Pulsed Laser
| Autor: | Hamid Nadjari, Hadi Movahedinejad |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Bubble Mie scattering Biophysics Absorption cross section Physics::Optics Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Physics::Fluid Dynamics 010309 optics Boiling point Temperature gradient Chemical physics 0103 physical sciences Liquid bubble 0210 nano-technology Plasmon Biotechnology |
| Zdroj: | Plasmonics. 15:631-638 |
| ISSN: | 1557-1963 1557-1955 |
| DOI: | 10.1007/s11468-019-01055-z |
| Popis: | Suspended gold nanoparticle in water medium starts to warm up under nanosecond laser irradiation and creates a bubble around itself. The present study aims at evaluating the amount of nanoparticle size reduction at boiling temperature, the temperature variations of the nanoparticle, and its medium and finally the bubble formation moment. To this aim, Mie theory was used to calculate the absorption cross section of the nanoparticle in proximity of the bubble. Heat transfer equations were applied to determine the temperature of the nanoparticle and water. In addition, hydrodynamic equations were initiated to evaluate the expansion of the bubble. Then, these three groups of equations were coupled together and solved numerically. Based on the results, the bubble forms at the critical pressure and consequently due to the slow bubble velocity, temperature gradient in the medium is observed. Further, slight pulse width variations play a significant role on the nanoparticle temperature. The calculation of the nanoparticle heating associated with the creation of the bubble helps in controlling nanoparticle size and understanding the nanoscale heat transfer processes. |
| Databáze: | OpenAIRE |
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