CAJ | 학술논문

利用长链烷烃取代基与石墨表面的较强相互作用,可以获得烷基取代的有机小分子(酞菁、卟啉、碱基)的高分辨STM图像.理论分析表明,这些分子的吸附稳定性来源于长链烷基与石墨间较强的范德华相互作用,以及长链烷烃链间的二维结晶能.分子在表面的吸附组装结构受到分子与基底间、吸附分子间,以及溶剂与分子间作用的共同影响.对于长链烷基取代的碱基分子在石墨表面的组装结构中,分子的排列方式不仅受到烷基链与石墨间较强的取向匹配的作用,碱基分子间形成的多个氢键以及芳环离域π键的作用也会影响分子的排列方式,并且是造成烷基取代碱基分子组装结构多样性的原因.扫描隧道谱研究表明,硫醇在Au表面的自组装分子膜对电流的整流作用,来自于分子中巯基与Au表面形成的双电层,而不对称取代的NtBuPc分子在石墨表面的LB膜的电流整流行为,来源于分子内部的不对称电子结构.
이용장련완경취대기여석묵표면적교강상호작용,가이획득완기취대적유궤소분자(태정、계람、감기)적고분변STM도상.이론분석표명,저사분자적흡부은정성래원우장련완기여석묵간교강적범덕화상호작용,이급장련완경련간적이유결정능.분자재표면적흡부조장결구수도분자여기저간、흡부분자간,이급용제여분자간작용적공동영향.대우장련완기취대적감기분자재석묵표면적조장결구중,분자적배렬방식불부수도완기련여석묵간교강적취향필배적작용,감기분자간형성적다개경건이급방배리역π건적작용야회영향분자적배렬방식,병차시조성완기취대감기분자조장결구다양성적원인.소묘수도보연구표명,류순재Au표면적자조장분자막대전류적정류작용,래자우분자중구기여Au표면형성적쌍전층,이불대칭취대적NtBuPc분자재석묵표면적LB막적전류정류행위,래원우분자내부적불대칭전자결구.
Self-assembled organic molecules, including alkylated phthalocyanines, porphyrinand adenine, physisorbed on graphite surface have been stabilized and dispersed on the basalplane of graphite by using linear alkyl substituents as molecular anchors, and have been sys-tematically studied under ambient conditions, with the combination of scanning tunnelling mi-croscopy and molecular mechanics simulation. In addition, scanning tunnelling microscopymeasurements have been performed to characterize the conductance behaviour of thiol/Au andphthalocyanines LB films/HOPG, as well as the capillary condensed liquid meniscus formedaround tip-substrate contact.