【摘要】 采用电子束蒸发沉积方法制备的Ａｕ基片，分别放在０．００１Ｍ的正丁硫醇、正十二硫醇的纯溶液和混合溶液中，通过化学吸附制备得到自组装单分子层膜。利用原子力显微镜（ＡＦＭ），对正丁硫醇、正十二硫醇以及两种硫醇混合物在Ａｕ基片上的自组装单分子层膜进行了观察研究。从原子分辨的ＡＦＭ图像观察三种分子膜的周期性六边形等间距排列图像，最邻近间距分别为０．５０ｎｍ±０．０２ｎｍ、０．５２ｎｍ±０．０３ｎｍ和０．５１ｎｍ±０．０３ｎｍ，与Ａｕ（１１１）晶格表面上的间距为０．５０ｎｍ的Ｒ３０°吸附层的间距一致。用ＡＦＭ观察测量出了膜的厚度分别为０．６７ｎｍ、１．６０ｎｍ和１．３２ｎｍ。更多还原

【Abstract】 Gold substrates are prepared by the electron-beam evaporation and placed in the 0.001 Methanolic solutions of pure and mixed n- butyl sulfhydrate,n-dodecyl mercaptan respectively.Self-assembledmonolayer films are prepared by the chemisorption of the corresponding thiof on gold from the solutions.Thepure and mixed self-assembled monolayer films are oberved and studied using atomic force microscope(AFM).AFM images of three films are obtained. All the images exhibit a periodic hexagonal pettern ofequivalent spacings,nearest- neighbor distances of 0.50 nm±0.02 nm,0.52 nm±0.03 nm and 0.51 nm±0.03 nm respotively.These spacings agree well with the analogous 0.50 nm distance of a R30°adlayer on a Au(111)lattice.The thicknesses of the films obtained with AFM are 0.67 nm,1.60 nm and 1.32 nm respectively.更多还原