Size reduction of gold particles in aqueous solution by pulsed laser irradiation
Size reduction of gold particles in aqueous solution by pulsed laser irradiation
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DOI：
10.1063/1.120894
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发表时间：
1998-02-16
影响因子：
4
通讯作者：
Koda, S
中科院分区：
文献类型：
--
作者：
Kurita, H;Takami, A;Koda, S
当氯金酸溶液化学还原产生的金颗粒受到脉冲Nd:Yag激光（532 nm）的二次谐波照射时，其直径从十几纳米以上减小到20纳米以下。与此同时，原本非球形的颗粒形状变成了球形。这种现象仅限于脉冲激光，是由于激光照射极短的时间内颗粒被加热而引起的；等离激元吸收时粒子的非常大的吸收截面和水中受照射粒子的隔热性应负有责任。 (C) 1998 年美国物理研究所。
When the gold particles produced by the chemical reduction of hydrogen chloroaurate solution were irradiated by the second harmonic of a pulsed Nd:Yag laser (532 nm), their diameter was reduced from more than several deca-nm to less than 20 nm. At the same time, the shape of the particles, originally nonspherical, became spherical. This phenomenon was limited to pulsed laser, and is caused by the heating of the particles within the very short time of laser irradiation; the very large absorption cross section of the particles at the plasmon absorption and the thermal insulation of the irradiated particles in water should be responsible. (C) 1998 American Institute of Physics.