標題: | Preparation and micropatterning of gold nanoparticles by femtosecond laser-induced optical breakdown |
作者: | Uwada, Takayuki Wang, Shun-Fa Liu, Tsung-Han Masuhara, Hiroshi 應用化學系 Department of Applied Chemistry |
關鍵字: | Femtosecond laser;Optical breakdown;Gold nanoparticles;Multiphoton absorption;Micropatterning |
公開日期: | 1-九月-2017 |
摘要: | We fabricated gold nanoparticles (NPs) via a femtosecond (fs) laser-induced cavitation bubbling. By introducing intense fs laser pulses into HAuCI4 aqueous solution containing 1-propanol, optical breakdown and the following cavitation bubble generation occurred at the focus through multiphoton absorption of water, resulting in the formation of gold nanoparticles (Au NPs). Intermediate species such as radicals and solvated electrons produced upon the bubbling contribute to gold ion reduction, while direct ionization of Au-chloride complex, photothermal decomposition and direct optical decomposition are excluded as possible mechanisms. Utilizing the fs laser-induced bubbling we demonstrate in-situ micropatterning of Au NPs on a substrate from the same HAuCI4 aqueous solution containing 1-propanol. (C) 2017 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.jphotochem.2017.05.051 http://hdl.handle.net/11536/145911 |
ISSN: | 1010-6030 |
DOI: | 10.1016/j.jphotochem.2017.05.051 |
期刊: | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY |
Volume: | 346 |
起始頁: | 177 |
結束頁: | 186 |
顯示於類別: | 期刊論文 |