研究目的
Investigating the generation and characterization of gold-iron bimetallic clusters using a nano-composite precursor for potential applications in nanotechnology and biomedicine.
研究成果
The {AuNPs, Fe-MOF} nano-composite was found to be a suitable precursor for the laser ablation generation of a variety of Au-Fe clusters. Mass spectrometry was shown to be an efficient technique for the determination of the cluster stoichiometry. The proposed method opens up the possibility to synthesise such cages on a large scale, broadening the applications of this prospective material in biomedicine and nanotechnology.
研究不足
The mechanism of the formation of the clusters is probably quite complex, but its explanation is beyond the scope of the paper. Further experimental or computational evidence is needed to confirm the structures of the AumFen+ (n = 2-5) clusters.
1:Experimental Design and Method Selection:
Laser desorption ionisation (LDI) was used for the generation of Au-Fe bimetallic clusters via laser ablation of the synthesised nano-composite {AuNPs, Fe-MOF}. A quadrupole ion trap time of flight mass spectrometer, equipped with a reflectron, was used to acquire mass spectra.
2:Sample Selection and Data Sources:
A {AuNPs, Fe-MOF} nano-composite was prepared by mixing a colloidal solution of AuNPs with MOFs powder.
3:List of Experimental Equipment and Materials:
AXIMA Resonance quadrupole ion trap mass spectrometer (Kratos Analytical, Manchester, UK), nitrogen laser (337 nm, frequency 5 Hz, pulse time 3 ns), tetrachloroauric acid (HAuCl4), gallic acid, iron(II) oxalate dihydrate, and Basolite?F
4:Experimental Procedures and Operational Workflow:
3 The composite was prepared by a one-step adsorption process. Mass spectra were measured with the impact laser energy from 0 to 180 a.u., with at least 1000 laser profiles.
5:Data Analysis Methods:
Launchpad software version 2.9.3 (Kratos Analytical) was used for mass spectra interpretation and determination of the stoichiometry of the generated clusters.
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