Single laser pulse induced aggregation of gold nanoparticles
| Autor: | Natsumi Matsuo, Fumitaka Mafuné, Hitomi Muto, Ken Miyajima |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Aqueous solution
Time Factors Absorption spectroscopy Chemistry Lasers Analytical chemistry General Physics and Astronomy Nanoparticle Metal Nanoparticles Sodium Dodecyl Sulfate Water Laser law.invention Solutions Microscopy Electron Transmission law Colloidal gold Transmission electron microscopy Particle Irradiation Gold Physical and Theoretical Chemistry Particle Size |
| Zdroj: | Physical chemistry chemical physics : PCCP. 9(45) |
| ISSN: | 1463-9076 |
| Popis: | Gold nanoparticles with an average diameter of 11 nm (Au(39000)) were prepared in an SDS aqueous solution. A 80-microm liquid droplet (microdroplet) of the solution was ejected into the atmosphere from a microdroplet nozzle. Structural changes of the gold nanoparticles in the microdroplet, after they were irradiated with a focused single-nanosecond laser pulse at the wavelength of 532 nm, were studied by transmission electron microscopy (TEM) and optical absorption spectroscopy. It was revealed that the gold nanoparticles are fragmented into small particles and then the small fragments aggregate with each other. The aggregation was found to be terminated 100 micros after the laser-pulse excitation. |
| Databáze: | OpenAIRE |
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