CNISM, Sede Consorziata di Genova and Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, I-16146 Genova, Italy.
ACS Nano. 2013 Jul 23;7(7):5834-41. doi: 10.1021/nn400918n. Epub 2013 Jun 11.
Small aluminum nanoparticles have the potential to exhibit localized surface plasmon resonances in the deep ultraviolet region of the electromagnetic spectrum, however technical and scientific challenges make it difficult to attain this limit. We report the fabrication of arrays of Al/Al2O3 core/shell nanoparticles with a metallic-core diameter between 12 and 25 nm that display sharp plasmonic resonances at very high energies, up to 5.8 eV (down to λ = 215 nm). The arrays were fabricated by means of a straightforward self-organization approach. The experimental spectra were compared with theoretical calculations that allow the correlation of each feature to the corresponding plasmon modes.
小的铝纳米粒子在电磁频谱的深紫外区域具有表现出局域表面等离激元共振的潜力，然而技术和科学方面的挑战使得难以达到这一极限。我们报告了具有在 12 至 25nm 之间的金属芯直径的 Al/Al2O3 核/壳纳米粒子的阵列的制造，其在非常高的能量下显示出尖锐的等离子体共振，高达 5.8eV（波长低至 215nm）。该阵列是通过一种简单的自组织方法制造的。实验光谱与理论计算进行了比较，这使得可以将每个特征与相应的等离子体模式相关联。
