分析化学
分析化學
분석화학
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
2009年
11期
1671-1674
,共4页
电化学扫描隧道显微镜%腺嘌呤%胸腺嘧啶%共吸附%Au(111)电极
電化學掃描隧道顯微鏡%腺嘌呤%胸腺嘧啶%共吸附%Au(111)電極
전화학소묘수도현미경%선표령%흉선밀정%공흡부%Au(111)전겁
Electrochemical scanning tunneling microscopy%adenine%thymine%coadsorption%Au(111)
用循环伏安法(CV)和电化学扫描隧道显微镜(ECSTM)在HClO_4溶液中研究了配对碱基腺嘌呤(Adenine,A)与胸腺嘧啶(Thymine,T)在Au(111)电极上的共吸附行为.CV曲线表明,A和T的电化学共吸附行为更接近于A的电化学吸附行为.高分辨STM图像显示,在物理吸附区域碱基A和T分子之间通过氢键作用形成一种不同于单组分的网络结构.根据STM图像提出一个可能的模型,并给出了在Au(111)电极上共吸附时A和T分子之间可能的氢键作用方式.
用循環伏安法(CV)和電化學掃描隧道顯微鏡(ECSTM)在HClO_4溶液中研究瞭配對堿基腺嘌呤(Adenine,A)與胸腺嘧啶(Thymine,T)在Au(111)電極上的共吸附行為.CV麯線錶明,A和T的電化學共吸附行為更接近于A的電化學吸附行為.高分辨STM圖像顯示,在物理吸附區域堿基A和T分子之間通過氫鍵作用形成一種不同于單組分的網絡結構.根據STM圖像提齣一箇可能的模型,併給齣瞭在Au(111)電極上共吸附時A和T分子之間可能的氫鍵作用方式.
용순배복안법(CV)화전화학소묘수도현미경(ECSTM)재HClO_4용액중연구료배대감기선표령(Adenine,A)여흉선밀정(Thymine,T)재Au(111)전겁상적공흡부행위.CV곡선표명,A화T적전화학공흡부행위경접근우A적전화학흡부행위.고분변STM도상현시,재물리흡부구역감기A화T분자지간통과경건작용형성일충불동우단조분적망락결구.근거STM도상제출일개가능적모형,병급출료재Au(111)전겁상공흡부시A화T분자지간가능적경건작용방식.
The coadsorption behavior of two complementary DNA bases,adenine(A) and thymine(T),was studied on Au(111) electrode by cyclic voltammetry(CV) and electrochemical scanning tunneling microscopy ( ECSTM) in aqueous solution. From the CVs,the coadsorption behavior of A and T was more closed to the adsorption behavior of A. In the potential range of physisorption,high- resolution ECSTM images of revealed that a new super-structure was formed by the hydrogen bonds between A and T. A molecular model of the super-structure was proposed based on the STM results and the possible hydrogen bonds between A and T.
