High-resolution imaging of organic monolayers using noncontact AFM
High-resolution imaging of organic monolayers using noncontact AFM
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使用非接触式 AFM 对有机单层进行高分辨率成像
DOI：
10.1016/s0169-4332(99)00534-6
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发表时间：
2000
影响因子：
6.7
通讯作者：
M. Ishikawa
中科院分区：
文献类型：
--
作者：
T. Uchihashi;T. Ishida;M. Komiyama;M. Ashino;Y. Sugawara;W. Mizutani;K. Yokoyama;S. Morita;H. Tokumoto;M. Ishikawa
非接触式原子力显微镜（AFM）为有机分子的高分辨率成像提供了一种有效的技术手段。在这里，我们介绍了我们的最新进展，在非接触式原子力显微镜成像的有机材料。(I)在腺嘌呤和胸腺嘧啶膜上观察到清晰的分子堆积结构、缺陷和畴界。非接触式AFM图像揭示了单个核酸碱基分子的详细特征，从而使我们能够区分腺嘌呤和胸腺嘧啶。(II)在Au（111）表面的硫醇盐自组装单分子膜[CH_3（CH_2）_8 SH]（壬基硫醇）上，（CH_3 × CH_3）R_（30）°结构和c（4×2）超晶格结构都得到了分辨.我们发现，随着针尖-表面距离的减小，c（4×2）超晶格结构转变为（103 × 103）R30°结构。
Noncontact atomic force microscopy (AFM) provides useful technique for imaging organic molecules in high resolution. Here we present our recent advances in the noncontact AFM imaging of organic materials. (I) Molecular packing structures, defects and domain boundaries were clearly observed on adenine and thymine films. The noncontact AFM images revealed detailed features of the individual nucleic acid base molecules, thus allowing us to distinguish between adenine and thymine. (II) Both (√3×√3)R30° structures and c(4×2) superlattice structures were resolved on alkanethiolate self-assembled monolayer (SAM) [CH3(CH2)8SH] (nonanethiol) on Au(111). We found that the c(4×2) superlattice structures changed into (√3×√3)R30° structures when the tip–surface distance decreased.