首页> 外文期刊>Langmuir: The ACS Journal of Surfaces and Colloids >Stress and DNA Assembly Differences on Cantilevers Gold Coated by Resistive and E-Beam Evaporation Techniques
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Stress and DNA Assembly Differences on Cantilevers Gold Coated by Resistive and E-Beam Evaporation Techniques

机译:电阻和电子束蒸发技术涂覆悬臂金的应力和DNA组装差异

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摘要

Changes in the sign of differential surface stress of gold-coated cantilevers produced by thiol-derivatized singlestranded DNA immobilization are observed, depending on the method used to deposit the gold. While the DNA immobilization on e-beam gold-coated cantilevers produces a compressive differential surface stress in the metallic layer, the opposite is observed for resistively coated cantilevers under the same immobilization conditions. The gold films exhibit quite a similar morphology, and the immobilization differences seem to be related to the charge state of the metallic layer surface. This in turn produces a different distribution of the orientation of the DNA strands on the gold layer. A tentative explanation for the observed effect is proposed.
机译:根据用于沉积金的方法,观察到由硫醇衍生的单链DNA固定产生的镀金悬臂的不同表面应力的符号变化。虽然DNA固定在电子束镀金悬臂上会在金属层中产生压差表面应力,但在相同的固定条件下,电阻镀悬臂的情况却相反。金膜表现出非常相似的形态,并且固定差异似乎与金属层表面的电荷状态有关。反过来,这会在金层上产生不同的DNA链取向分布。建议对观察到的效果进行初步解释。

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