Transfer-printing of single DNA molecule arrays on graphene for high-resolution electron imaging and analysis.

Transfer-printing of single DNA molecule arrays on graphene for high-resolution electron imaging and analysis.
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DOI:
10.1021/nl202219w
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发表时间:
2011-10-12
期刊:
影响因子:
10.8
通讯作者:
Craighead HG
Craighead HG
中科院分区:
材料科学1区
文献类型:
--
作者:
Cerf A;Alava T;Barton RA;Craighead HG

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石墨烯代表了高分辨率透射电子显微镜的最终基底,但在这种高度疏水的材料上沉积生物样品迄今为止一直是一个挑战。我们提出了一种可靠的方法,用于在单层石墨烯基底上沉积单个细长DNA分子的有序阵列,用于高分辨率电子束成像和电子能量损失谱分析。该方法是以单碱基空间分辨率观察单个伸长DNA分子以直接读取遗传和表观遗传信息的必要步骤。
Graphene represents the ultimate substrate for high-resolution transmission electron microscopy, but the deposition of biological samples on this highly hydrophobic material has until now been a challenge. We present a reliable method for depositing ordered arrays of individual elongated DNA molecules on single-layer graphene substrates for high resolution electron beam imaging and electron energy loss spectroscopy analysis. This method is a necessary step towards the observation of single elongated DNA molecules with single base spatial resolution to directly read genetic and epigenetic information.
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