Effect of Pd Ions on the Generation of Ag and Au Heterogeneous Nanoparticles Using Laser Ablation in Liquid

Applied Sciences

KyeSang Yoo¹  Sangwoo Yoon²  Joohan Kim² 

[1] Department of Chemical & Biomolecular Engineering, Graduate School, Seoul National University of Science & Technology, Seoul 01811, Korea;Department of Mechanical Engineering, Graduate School, Seoul National University of Science & Technology, Seoul 01811, Korea;

关键词: laser ablation in liquid;    Pd ions;    Ag;    Au;    heterogeneous nanoparticles;   

DOI  :  10.3390/app11041394

来源: DOAJ

【 摘 要 】

Heterogeneous Ag/Au nanoparticles combined with Pd ions were generated by irradiating Ag/Au metal targets in a Pd solution with nanosecond and femtosecond lasers. AgPd and AuPd nanoparticles were generated by laser fragmentation and bonded. We numerically analyzed the hot spots with electromagnetic field enhancement of nanoparticles of different sizes separated by various distances. AgPd and AuPd nanoparticles differing in diameter were generated and showed different characteristics compared to typical core-shell heterogeneous nanoparticles. Pd ions played an important role in the generation of nanoparticles in liquid via laser ablation. The femtosecond laser produced both pure and heterogeneous nanoparticles of uniform size. The nanosecond laser produced pure nanoparticles with a relatively non-uniform size, which developed into spherical heterogeneous nanoparticles with a uniform (small) size in the presence of Pd ions. These nanoparticles could optimize applications such as photothermal therapy and catalysis.

【 授权许可】

Unknown