Chirality-induced spin-selective properties of self-assembled monolayers of DNA on gold
Chirality-induced spin-selective properties of self-assembled monolayers of DNA on gold
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DOI：
10.1103/physrevlett.96.036101
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发表时间：
2006-01-27
影响因子：
8.6
通讯作者：
Naaman, R
中科院分区：
文献类型：
--
作者：
Ray, SG;Daube, SS;Naaman, R
在这里，我们表明双链DNA低聚物在金上的自组装单层与极化电子的相互作用类似于强且定向的磁场。右旋DNA的场的方向远离基底。此外，该层显示出非常高的顺磁磁化率。有趣的是，巯基化的单链DNA寡聚体在金上不显示这种效应。新的发现是合理的基础上，最近的结果，其中高顺磁性的抗磁性薄膜吸附在抗磁性基板测量。
Here we show that self-assembled monolayers on gold of double-stranded DNA oligomers interact with polarized electrons similarly to a strong and oriented magnetic field. The direction of the field for right-handed DNA is away from the substrate. Moreover, the layer shows very high paramagnetic susceptibility. Interestingly, thiolated single-stranded DNA oligomers on gold do not show this effect. The new findings are rationalized based on recent results in which high paramagnetism was measured for diamagnetic films adsorbed on diamagnetic substrates.