Abstract

The interband transition onset frequency of nanoaluminum is found to approximately, linearly decrease as reducing aluminum diameter in the 25–100 nm range. This linear relation is indicated to originate mostly from increased inner strain of nanoparticle caused by the small size effect. This relation realizes to introduce the size dependence of interband transitions into the metallic dielectric function and has its important application in the laser ignition of nanoenergetic materials.

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