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aluminum nanoparticle is a widely used catalyst for various chemical reactions. It is also known for its anti-corrosion properties. Its high catalytic activity and stability make it suitable for a variety of applications such as electrocatalyses, fuel cells and batteries.
Aluminum-based metal-organic frameworks (MOFs) are a promising class of materials for applications such as water purification, hydrogen production and catalysis. Their versatility stems from the fact that they can be designed with a wide range of shapes, sizes and surface morphologies. Moreover, the MOFs can be manipulated through different mechanisms such as chemical reduction and sonochemical synthesis to achieve a desired reactivity and specificity.
However, the precise control of the size, morphology, stability and properties of the MOFs remains a challenge due to their tendency to oxidize rapidly. To overcome this issue, a large effort is being devoted to modifying the surface of the aluminum nanoparticles by passivation in order to obtain long-lived and stable MOFs.
In addition to the optimization of synthesis and stabilization methods, understanding the fundamental interactions between aluminum nanoparticles and fluorophores is an essential step in the development of more efficient label free systems. To this end, we have analyzed the interaction between a fluorescent protein (FP) and an aluminum nanoparticle in a range of wavelengths.
We find that the aluminum nanoparticle induces a much more efficient emission enhancement than an isolated fluorophore when the dipole of the FP is oriented perpendicular to the aluminum nanoparticle. This is because the effective radiating dipole of the aluminum dimer is larger than that of an isolated fluorophore.