【摘要】 利用基于原子力显微镜的单分子力谱技术,定量研究了独立状态下自组装单层膜中的单个硫醚-金相互作用强度,并从单分子水平探讨了外界因素对硫-金配位键强度的影响.结果表明,硫醚分子以配位键形式与金基底结合;与还原金表面相比,氧化金表面能够加强硫-金作用强度;另外,溶剂对其硫-金配位键强度也产生影响.更多还原

【Abstract】 We have employed atomic force microscopy( AFM)-based single molecule force spectroscopy(SMFS) to quantify the stability of the individual thioether-gold contact in isolated as well as in a selfassembled monolayer. The external factors that affect the sulfide-gold binding strength were investigated at the single-molecule level. The results show that the alkyl sulfide molecule formed coordinate bond on gold surface.Compared with reduced gold,the oxidized gold can enhance the sulfide-gold interactions in both isolated individual monosulfide-gold contacts and in self-assembled membranes( SAMs). Also,the solution condition can affect the stability of Au—S coordinate bonds.更多还原