用中等能量离子辐射方法研究C_(60)膜结构变化

在２００ｋｅＶ重离子加速器上，使用１２０ｋｅＶ的Ｈ＋，Ｈｅ＋，Ｎ＋，Ａｒ＋等离子对Ｃ６０分子薄膜进行了辐射处理，对辐射后Ｃ６０膜的Ｒａｍａｎ谱进行了系统地分析研究．离子辐射会影响Ｃ６０薄膜的结构，不同的辐射注入剂量会使Ｃ６０分子薄膜产生聚合和非晶碳化现象，这一现象的产生与辐射离子的剂量大小有关，并存在一剂量阈值．研究表明Ｃ６０分子的聚合与辐射碰撞过程中的电子能损有关，而Ｃ６０薄膜非晶碳化现象则主要受核能损的影响In this paper, the C 60 films have been implanted at room temperature with 120keV H +, He +,N + and Ar + ions by using a 200keV heavy ion accelerator. After that, the sample are investigated with Raman spectra. The results show that the irradiation by medium energy ion could make C 60 films polymerization and amorphism, also there is certain threshold dose for this phenomena, which relate to interaction between the irradiation ion and C 60 molecule. Preliminary explan..

离子注入对C_(60)薄膜结构的影响

利用高能离子注入技术系统地研究了不同剂量、不同种类离子注入对Ｃ６０薄膜结构的影响，并利用Ｒａｍａｎ光谱对其结构进行分析．结果表明：中等能量的离子注入会影响Ｃ６０薄膜的结构，使Ｃ６０分子薄膜产生聚合和非晶碳化现象，但上述现象的出现与注入离子的剂量大小有关，并存在一注量阈值，只有在此阈值之上，Ｃ６０薄膜结构才发生改变，研究表明这与注入离子同Ｃ６０分子之间互作用方式有关C 60 films were irradiatied at room temperature by medium energy(120 360keV) radiation of different ions (H +,He +,N +,Ar +), and the radiation effects were investigated using Raman spectra. The results showed that the radiation of medium energy ions could cause C 60 films polymerized and amorphous. However, occurrence of the phenomena depends on dosage, which is related to the interaction between the radiation ion and C 60 molecule. A possible explanation for th..

低温分子束外延GaAs薄膜的带边二次电光效应和光折变效应

研究了低温生长分子束外延GaAs薄膜的光电子性质。测量了它的I-V特性；用电调制透射谱测量了电吸收和电折变，并由此分析了它的带边共振吸收平方电光效应；用二波混合的方法测量了它的光折变性质，对两种方法得到的电吸收和电折变作了分析比较