真空升华条件对C₆₀／C₇₀薄膜成份的影响

真空升华条件对C 60 ／C 70 薄膜成份的影响 THE VACUUM SUBLIMATION CONDITION EFFECTS ON THE COMPOSITION OF C 60 /C 70 FILMS 于涛 Yu Tao 1 first-author 李金钗 Li Jinchai 1 范湘军 Fan Xiangjun 1 叶明生 Ye Mingsheng 1 武汉大学物理学系 武汉大学物理学系 Department of Physics, Wuhan University Department of Physics, Wuhan University 通过热重分析测定ＴＣ６０／Ｃ７０混合物的明显升华起始温度约为６００℃．在高真空（１０（－３）Ｐａ）中加热Ｃ６０／Ｃ７０混合物使其升华，在ＫＢｒ晶体上形成薄膜，对不同升华条件下所得薄膜的傅里叶变换红外光谱（ＦＴＩＲ）进行比较，得出了薄膜成分变化规律．发现６００℃加热混合物足够长时间，能去除混合物中低碳素富勒烯杂质，再恒温７００℃升华混合物，薄膜主要由Ｃ６０组成． Thermogravimetry analysis was made for C60/C70 mixture. The mixture was sublimated in high vacuum for obtaining the films on KBr substrates. The FTIR spectra of the films sublimated in different conditions show that pure C,, film could be obtained if the mixture was first heated at 600 ℃for greater than 30 minutes and then film was prepared at 700℃. C60／C70混合物 真空升华 傅里叶变换 红外光谱 热重分析 O484 国家自然科学基金(61672102) 1995-01-01 2021-04-01 1