Structure of linear double-stranded deoxyribonucleic acid adsorbed on Cu(111) surfaces: A low-temperature scanning tunneling microscopy study

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机构：
[1] Nishimura, Makoto
[2] Tanaka, Hiroyuki
[3] Kawai, Tomoji
来源：
Kawai, T. (kawai@sanken.osaka-u.ac.jp) | 1600年 / Japan Society of Applied Physics卷 / 41期
关键词：
Adsorption - Annealing - DNA - Scanning electron microscopy - Sputtering;
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摘要：
We have obtained high-resolution scanning tunneling microscopy (STM) images of poly(dA-dT)·poly(dA-dT) and poly(dG-dC)·poly(dG-dC) adsorbed on Cu(111) substrates. STM revealed that the two deoxyribonucleic acid molecules have different adsorbed structures and topographic heights. We concluded that the observed structural differences originate from the inherent differences in the stability of the adenine-thymine (A-T) and guanine cytosine (G-C) base pairs.
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