Fabrication of silver nanoparticles by highly intense laser irradiation of aqueous solution
Fabrication of silver nanoparticles by highly intense laser irradiation of aqueous solution
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DOI：
10.1007/s00339-011-6499-5
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
Takahiro Nakamura;Hideyuki Magara;Y. Herbani;S. Sato
中科院分区：
文献类型：
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作者：
Takahiro Nakamura;Hideyuki Magara;Y. Herbani;S. Sato
采用飞秒强激光辐照不同浓度的硝酸银水溶液制备了银纳米粒子。照射后，在30和300 mM溶液中观察到源自Ag纳米颗粒的表面等离子体共振的420 nm左右的宽吸收峰。透射电子显微镜显示，在300 mM AgNO 3溶液中产生的银纳米颗粒具有2至20 nm的范围内的典型尺寸和4 nm的平均尺寸。向300 mM溶液中添加1.0×10 - 2wt%聚乙烯吡咯烷酮作为分散剂导致激光照射后的更窄的粒度分布以及更窄的吸收峰宽度。结果，制备了平均粒径约为2 nm的Ag纳米颗粒。
Silver (Ag) nanoparticles were fabricated by highly intense femtosecond laser irradiation of aqueous solutions of silver nitrate (AgNO3) with various concentrations. After irradiation, a broad absorption peak at around 420 nm originating from surface plasmon resonance of Ag nanoparticles was observed in 30 and 300 mM solutions. Transmission electron microscopy revealed that Ag nanoparticles produced in 300 mM AgNO3solution had a typical size in the range of 2 to 20 nm and a mean size of 4 nm. The addition of 1.0×10−2wt% polyvinylpyrrolidone as a dispersant to the 300 mM solution caused a narrower particle size distribution as well as a narrower absorption peak width after the laser irradiation. As a result, Ag nanoparticles with a mean particle size of about 2 nm were fabricated.