Preparation of silver nanoparticles by laser ablation in polyvinylpyrrolidone solutions
Preparation of silver nanoparticles by laser ablation in polyvinylpyrrolidone solutions
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DOI：
10.1016/j.apsusc.2008.02.048
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发表时间：
2008-06
影响因子：
6.7
通讯作者：
T. Tsuji;D. Thang;Yuuki Okazaki;M. Nakanishi;Yasuyuki Tsuboi;M. Tsuji
中科院分区：
文献类型：
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作者：
T. Tsuji;D. Thang;Yuuki Okazaki;M. Nakanishi;Yasuyuki Tsuboi;M. Tsuji
我们在聚乙烯吡咯烷酮（PVP）水溶液中对银板进行激光烧蚀，制备银纳米颗粒。对制备的胶体溶液进行二次激光照射。结果表明，PVP的加入不仅提高了地层效率，而且提高了纳米颗粒的稳定性。阴影测量结果表明PVP的烧蚀效率的提高是由于溶剂约束等离子体对银板的二次刻蚀效率的提高。另一方面，PVP在二次辐照过程中比激光烧蚀（纳米颗粒制备）过程中对纳米颗粒尺寸的减小更为显著。结果表明，在激光烧蚀过程中，发射材料与PVP分子的相互作用不如二次激光辐照过程充分。
We performed laser ablation of a silver plate in polyvinylpyrrolidone (PVP) aqueous solutions to prepare silver nanoparticles. Secondary laser irradiation onto the prepared colloidal solutions was also carried out. It was revealed that the formation efficiency was increased by addition of PVP as well as the stability of nanoparticles. The result of shadowgraph measurements suggested that the increased ablation efficiency by PVP is attributable to increased secondary etching efficiency by the solvent-confined plasma toward the silver plate. On the other hand, the size decrease of the nanoparticles by addition of PVP was more remarkable during the secondary irradiation process than in the laser ablation (nanoparticle preparation) process. This result indicates that emitted materials interact less sufficiently with PVP molecules in the laser ablation process than in the secondary laser irradiation process.