Capacitance Characterization of the Effect of pH Value on the Self-assembled Monolayers of Octadecanethiol  

作　　者：KeQiangDING QingFeiWANG RuTingTONG HuiBoSHAO 

机构地区：[1]ChemistryCollege,HebeiTeachersUniversity,Shijiazhuang050016 [2]DepartmentofChemistry,CapitalNormalUniversity,Beijing100037

出　　处：《Chinese Chemical Letters》2003年第4期411-412,共2页中国化学快报（英文版）

基　　金：This work was supported by the NNSFC (29973026).

摘　　要：In this paper, the membrane capacitance (Cm), which was obtained from the electro- chemical impedance spectroscopy (EIS) method, was used to characterize the effect of pH value on the self-assembled monolayers (SAMs) of octadecanethiol(18SH) for the first time. The results not only strongly proved that inorganic ions could penetrate the SAMs of 18SH, but also ascertained that SAMs of 18SH were not an absolute of free of ion-penetration. Verifying the existence of pin-holes in the octadecanethiol SAMs was the main contribution of this paper, which coincided with the former conjecture very well.In this paper, the membrane capacitance (Cm), which was obtained from the electro- chemical impedance spectroscopy (EIS) method, was used to characterize the effect of pH value on the self-assembled monolayers (SAMs) of octadecanethiol(18SH) for the first time. The results not only strongly proved that inorganic ions could penetrate the SAMs of 18SH, but also ascertained that SAMs of 18SH were not an absolute of free of ion-penetration. Verifying the existence of pin-holes in the octadecanethiol SAMs was the main contribution of this paper, which coincided with the former conjecture very well.

关 键 词：Octadecanethiol SAMS EFFECT pH value capacitance characterization. 

分 类 号：O623.81[理学—有机化学]