Electron production by noble metal nanoparticles in collision processes with photons and fast ions

29th International Conference on Photonic, Electronic, and Atomic Collisions

Verkhovtsev, Alexey^1,2 ; Korol, Andrei^2 ; Solov'Yov, Andrey^2

CSIC, Instituto de Fisíca Fundamental, Serrano 113-bis, Madrid

28006, Spain^1

MBN Research Center, Altenhöferallee 3, Frankfurt am Main

60438, Germany^2

关键词: Collective excitations;    Electron excitations;    Electron production;    Low energy electrons;    Noble metal clusters;    Photoabsorption spectra;    Photon energy range;    Time dependent density functional theory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112091/pdf
DOI  :  10.1088/1742-6596/635/11/112091

来源: IOP

【 摘 要 】

We analyzed electron production by noble metal nanoparticles irradiated by photons and fast ions. For that, photoabsorption spectra of several gold clusters were calculated in a broad photon energy range by means of time-dependent density-functional theory (TDDFT). Two dominant peaks appearing in the spectra of electron emission of noble metal clusters were assigned to two distinct types of collective electron excitations. This study revealed that the decay of the collective excitations formed in the nanoparticles is an important mechanism of generation of low-energy electrons, which are known to act as important agents of biodamage.