NON-DESTRUCTIVE DETECTION OF MONO-MOLECULAR-LAYER FORMATION OF FUNCTIONAL ORGANIC MOLECULES BY MEANS OF LOW-ENERGY-ELECTRON TRANSMISSION

(1)证实了用最简单的电子能谱技术--低能电子能谱(LEET)可以定量研究晶体表面的清洁度：(2)低能电子能谱能灵敏地检测到酞菁、BTQBT[双(1，2，5-噻二唑)-对喹啉(1，3-二硫)]和C&lt；60&GT晶体表面有序单分子层的生长；(3)用角度分辨光电子能谱、高分辨电子能量损失谱、低能电子衍射和潘宁电离电子能谱测定了MoS_2表面酞菁和BEQBT薄膜的分子取向和二维结构，这些方法得到的结果与Leet的结果一致。(4)对于AICI-酞菁，我们发现CI原子突出在膜表面外的单分子层最稳定的状态。

(1) IT WAS CONFIRMED THAT THE CLEANLINESS OF CRYSTAL SURFACE CAN BE QUANTITATIVELY STUDIED BY LOW-ENERGY ELECTRON TRANSMISSION SPECTROSCOPY (LEET) WHICH IS THE SIMPLEST ELECTRON SPECTROSCOPIC TECHNIQUE.(2) THE GROWTH OF WELL ORDERED MONO-MOLECULAR LAYER ON MoS_2 CRYSTAL SURFACE COULD BE DETECTED SENSITIVELY WITH LEET FOR PHTHALOCYANINE'S,BTQBT [bis (1,2,5-thiadiazolo) -p-quinobis (1,3-dithiole)] AND C_<60> WITHOUT INTRODUCING RADIATION DAMAGES INTO THE FILMS.(3) THE MOLECULAR ORIENTATION AND TWO-DIMENSIONAL STRUCTURE OF THIN FILMS OF PHTHALOCYANINE'S AND BEQBT ON MoS_2 SURFACES WERE DETERMINED WITH ANGLE-RESOLVED PHOTOELECTRON SPECTROSCOPY,HIGH-RESOLUTION ELECTRON ENERGY LOSS SPECTROSCOPY,LOW-ENERGY ELECTRON DIFFRACTION AND PENNING IONIZATION ELECTRON SPECTROSCOOPY.THE RESULTS OBTAINED BY THESE METHODS WERE CONSISTENT WITH THOSE BY LEET.(4) FOR AICI-PHTHALOCYANINE,WE FOUND THAT THE CI ATOM PROTRUDING OUTSIDE THE FILM SURFACE IN THE MOST STABLE STATE OF THE MONO-MOLECULAR LAYER.