鸟嘌呤和胞嘧啶在高定向热解石墨上的共吸附配对结构  

Coadsorbed pairing structures of guanine and cytosine on HOPG

作　　者：李玉碟 蔡源青 刘文才 许世林 邱深玉[1] 陈小玲 李未[1,2] LI Yudie;CAI Yuanqing;LIU Wencai;XU Shilin;QIU Shenyu;CHEN Xiaoling;LI Wei(School of Science,Nanchang 330099,China;Key Laboratory of Optoelectronic Materials and New Energy Technology,Nanchang 330099,China)

机构地区：[1]南昌工程学院理学院,江西南昌330099 [2]南昌工程学院光电材料与新能源技术重点实验室,江西南昌330099

出　　处：《南昌工程学院学报》2021年第3期114-118,共5页Journal of Nanchang Institute of Technology

基　　金：江西省教育厅科学技术研究项目(GJJ180942);江西省自然科学基金资助项目(20202BABL201016);国家自然科学基金资助项目(12064026);国家大学生创新创业训练计划资助项目(201902282010);江西省大学生创新创业训练计划资助项目(S202011319010);南昌工程学院研究生创新项目(2020)。

摘　　要：利用扫描隧道显微镜研究了DNA碱基鸟嘌呤(G)和胞嘧啶(C)在高定向热解石墨表面共吸附形成的沃森-克里克G-C配对有序共吸附纳米结构,这与观测到的单种G和C组成的结构明显不同。通过对高分辨率扫描隧道显微镜图像的系统分析和第一性原理(DFT)计算,可以得出,氢键构型G和C的优先级和多样性之间的竞争是配对结构多态性的关键。The matching ordered CO adsorption nanostructures of Watson Crick G-C formed by CO adsorption of DNA base guanine(g)and cytosine(c)on the surface of high directional pyrolytic graphite were studied by scanning tunneling microscope,which is different from the observed structure of single G and C.Through the systematic analysis and the first principle(DFT)calculation of the high resolution scanning tunneling microscope image,we draw the conclusion that the competition between the priority and diversity of H-bond configuration G and C is the key to the pairing structure polymorphism.

关 键 词：扫描隧道显微镜 鸟嘌呤 胞嘧啶 碱基配对 

分 类 号：O484[理学—固体物理]