CuxC60薄膜紫外-可见吸收光谱研究

近来,有关C60的研究主要集中在有关晶格动力学、电子结构和MxC60（M代表碱金属或碱土金属）的超导电性研究。但由于MxC60在大气中不能稳定存在,制约了MxC60的深入研究和实际应用。最近,Masterov等人报导了他们对Cu/C60的超导特性研究,认为其转变温度Tc在80－120K之间,这个转变温度比现有的MxC60的转变温度Tc-40K）要高得多,但有关更进一步的研究未见报导,因此,我们拟对CuxC60体系作较为详尽的研究,这对于进一步研究其超导机理是有必要的,本工作是在成功地制备了CuxC60薄膜的基础上,对其紫外－可见吸收光谱进行了初步的研究。定性地分析了CuxC60薄膜的电子结构,利用XPS谱分析了CuxC60薄膜中Cu的化学价态。

Study of CuxC60 Film UV-Vis Absorption Spectrum

In this paper, the formation of the CuxC60 films has been described briefly. The UV Vis absorption spectrum of CuxC60 film have been discussed in detail, the electronic structure of CuxC60 film is discussed qualitatively. For x< 1, there exists only Cu＋ in the CuxC60 films. However, for x=4, not only Cu＋, but also atom Cu exists in them. In CuxC60 films three strong peaks have been shiffed compared with that of C60 films. The shift of these strong peaks shows that in the CuxC60 films C60 molecule accepts only one electron and becomes . Because of the existence of the atom Cu in the CuxC60 films, in visible region there is a wide peak which is the plasmons resonance absorb peak of the Cu cluster in it.