期刊
NANO LETTERS
卷 11, 期 12, 页码 5104-5110出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl202728j
关键词
Gallium; indium; alloy; liquid metal; self-assembled monolayer; nanoparticle; alkanethiol; ultrasound; sonication; hydrogen bonding
类别
资金
- CNSI
- Navy Applied Research Lab
- National Science Foundation [1013042]
- Kavli Foundation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1013042] Funding Source: National Science Foundation
We have developed a facile method for the construction of liquid-phase eutectic gallium-indium (EGaIn) alloy nanoparticles. Particle formation is directed by molecular self-assembly and assisted by sonication. As the bulk liquid alloy is ultrasonically dispersed, fast thiolate self-assembly at the EGaIn interface protects the material against oxidation. The choice of self-assembled monolayer ligand directs the ultimate size reduction in the material; strongly interacting molecules induce surface strain and assist particle cleavage to the nanoscale. Transmission electron microscopy images and diffraction analyses reveal that the nanoscale particles are in an amorphous or liquid phase, with no observed faceting. The particles exhibit strong absorption in the ultraviolet (similar to 200 nm), consistent with the gallium surface plasmon resonance, but dependent on the nature of the particle ligand shell.
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