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首页> 外文期刊>Science and Technology of Advanced Materials >Electronic structures of DNA molecules and their alignment control on Si(1 0 0) substrates with one-dimensional lattices
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Electronic structures of DNA molecules and their alignment control on Si(1 0 0) substrates with one-dimensional lattices

机译：具有一维晶格的Si（1 0 0）衬底上DNA分子的电子结构及其取向控制

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We have carried out molecular-orbital calculations of the four bases of DNA, adenine (A), thymine (T), guanine (G), and cytosine (C), and the dimer dApA formed from a deoxyadenosine by using a phosphate and terminating at the sites of 5' and 3'. The calculated results for A, T, G, and C are compared with the UPS spectra obtained by using a He II lamp with irradiation at 40.8 eV, and the experimental spectra are found to be generally reproduced by the calculations. We have also examined the alignment of 1.5-μm-length ring-shaped pBR322DNA composed of 4361 bp on Si(1 0 0) substrates with one-dimensional lattices. It is found that pBR322DNA can be observed only in the bottom parts of the one-dimensional lattice, while no appreciable DNA can be observed on the top parts of the lattice. These results suggest that DNA alignment can be controlled by one-dimensional lattices on Si(1 0 0) substrates through capillary action.
机译：我们已经对DNA的四个碱基，腺嘌呤（A），胸腺嘧啶（T），鸟嘌呤（G）和胞嘧啶（C）以及由脱氧腺苷形成的二聚体dApA进行了分子轨道计算，方法是使用磷酸酯并终止在5'和3'的位置。将A，T，G和C的计算结果与使用He II灯在40.8 eV照射下获得的UPS光谱进行比较，发现实验光谱通常可以通过计算得到。我们还检查了具有一维晶格的Si（1 0 0）衬底上由4361 bp组成的1.5μm长的环状pBR322DNA的比对。发现pBR322DNA只能在一维晶格的底部观察到，而在晶格的顶部则没有观察到明显的DNA。这些结果表明，DNA对齐方式可以通过毛细作用通过Si（1 0 0）衬底上的一维晶格来控制。

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