PHOTON-INDUCED INTERMOLECULAR COUPLING IN ULTRATHIN C-60 FILMS

被引：11

作者：

BACSA, WS ^{[1
]}

LANNIN, JS ^{[1
]}

机构：

[1] PENN STATE UNIV,DEPT PHYS,UNIV PK,PA 16802

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.49.14750

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman spectra of ultrathin C60 films on SiO(x) (x approximately 2) in ultrahigh vacuum show strong irradiation-induced changes that persist but decay with time (2-3 h). The induced changes are suppressed upon cooling (120 K) and additional changes are introduced with heating (600 K). The observation of induced low-energy vibrational bands between the molecular and lattice vibrational spectrum suggests intermolecular bond formation. Application of the semiempirical interatomic Tersoff potential to estimate the intermolecular coupling reveals that the interatomic potential for C60 differs strongly from that between two graphitic sheets and it is suggested that weak intermolecular covalent bonds are formed.

引用

页码：14750 / 14753

页数：4

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