Fabrication of platinum particles by intense, femtosecond laser pulse irradiation of aqueous solution
Fabrication of platinum particles by intense, femtosecond laser pulse irradiation of aqueous solution
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DOI：
10.1016/j.apsusc.2009.04.092
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发表时间：
2009-09
影响因子：
6.7
通讯作者：
Takahiro Nakamura;Kouichi Takasaki;A. Ito;S. Sato
中科院分区：
文献类型：
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作者：
Takahiro Nakamura;Kouichi Takasaki;A. Ito;S. Sato
在六水合氢六氯铂(IV) (H2PtCl6·6H2O) 水溶液中，通过紧密聚焦的飞秒激光脉冲诱导分子解离过程直接制备铂纳米颗粒。照射后，发现溶液的紫外-可见吸收光谱发生变化，合成了大量的铂小颗粒。光谱中吸光度的变化和颗粒合成的产率取决于溶液的浓度。颗粒合成最有效的条件是0.1wt%。有时在照射后在容器底部观察到铂粒子的黑色沉淀。添加聚乙烯吡咯烷酮（PVP）作为分散剂，颗粒的分散性得到了极大的改善，并且在1.0×10−2wt% PVP溶液中没有发现沉淀。因此，成功制备了平均尺寸约为3nm的高度单分散的铂纳米颗粒。
Platinum nano-particles were directly fabricated through molecular dissociation process induced by tightly focused femtosecond laser pluses in hydrogen hexachloroplatinate (IV) hexahydrate (H2PtCl6·6H2O) aqueous solution. After irradiation, it was found that UV–visible absorption spectrum of the solution was changed and a large number of small platinum particles were synthesized. The variation of absorbance in the spectrum and the yield the particle synthesis depended on the concentration of the solution. The most effective condition for particle synthesis was 0.1wt%. Black precipitates of platinum particles were observed in the bottom of the vessel after irradiation in some cases. The dispersibility of the particles was greatly improved by the addition of polyvinylpyrrolidone (PVP) as a dispersant, and no precipitates were found in the solution with 1.0×10−2wt% PVP. Consequently, highly monodispersed platinum nano-particles with the mean size of about 3nm were successfully fabricated.