Tadpole-shaped Au nano-particles fabricated by laser fragmentation of Au nano-spheres in liquid
| Autor: | Chong Zhang, Dameng Wang, Liang Liu, Dongdong Zhu, Ming Chen, Xiangdong Liu, Jiaqi Ma |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Absorption spectroscopy Physics::Optics Nanoparticle Nanotechnology 02 engineering and technology 01 natural sciences law.invention 010309 optics Optics law 0103 physical sciences Nano Laser power scaling Electrical and Electronic Engineering Surface plasmon resonance business.industry 021001 nanoscience & nanotechnology Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Absorption band Optoelectronics SPHERES 0210 nano-technology business |
| Zdroj: | Chinese Optics Letters. 14:081403-81406 |
| ISSN: | 1671-7694 |
| DOI: | 10.3788/col201614.081403 |
| Popis: | Tadpole-shaped Au nano-particles with controllable tails are successfully fabricated by simply using laser fragmentation of separated Au nano-spheres in liquid. The optimum laser power densities (1.5–3 GW/cm2) can enable part of the individual Au nano-sphere to be re-melted, released, and ultra-rapidly recondensed/crystallized on the outside of the original region. We find that the length of the tail in a tadpole-shaped Au nano-particle significantly increases from about 10 to 25 nm by increasing the laser power density. Benefiting from the unique structural features, the localized surface plasmon resonance (LSPR) absorption spectra of the tadpole-shaped Au nano-particles become broader by increasing the tail length. Moreover, the LSPR absorption band also exhibits a noticeable red shift from about 520 to 650 nm. Our results provide a convenient and valuable strategy to fabricated novel anisotropic-shaped nano-structures with fascinating properties. |
| Databáze: | OpenAIRE |
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