Nilius N, Ernst N, Freund H
Fritz-Haber Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany.
Phys Rev Lett. 2000 Apr 24;84(17):3994-7. doi: 10.1103/PhysRevLett.84.3994.
Photon emission spectra of individual alumina-supported silver clusters have been measured for the first time. The light emission stimulated by electron injection from the tip of a scanning tunneling microscope can be assigned to the (1,0) mode of the Mie-plasmon resonance in small silver particles. As cluster sizes decrease, the resonance position shifts to higher energies and the linewidth increases. In the size range examined (1.5-12 nm), intrinsic size effects are discussed as possible origins for the observed size dependence of the Mie resonance.
首次测量了单个氧化铝负载银团簇的光子发射光谱。由扫描隧道显微镜尖端注入电子所激发的光发射可归因于小银颗粒中米氏等离子体共振的(1,0)模式。随着团簇尺寸减小，共振位置向更高能量移动，线宽增加。在所研究的尺寸范围（1.5 - 12纳米）内，讨论了本征尺寸效应作为米氏共振所观察到的尺寸依赖性的可能起源。
