Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States.
Wyss Institute for Biologically Inspired Engineering, Harvard University , Boston, Massachusetts 02115, United States.
ACS Nano. 2016 Mar 22;10(3):3069-77. doi: 10.1021/acsnano.5b05159. Epub 2016 Feb 18.
DNA nanostructures are versatile templates for low cost, high resolution nanofabrication. However, due to the limited chemical stability of pure DNA structures, their applications in nanofabrication have long been limited to low temperature processes or solution phase reactions. Here, we demonstrate the use of DNA nanostructure as a template for high temperature, solid-state chemistries. We show that programmably shaped carbon nanostructures can be obtained by a shape-conserving carbonization of DNA nanostructures. The DNA nanostructures were first coated with a thin film of Al2O3 by atomic layer deposition (ALD), after which the DNA nanostructure was carbonized in low pressure H2 atmosphere at 800-1000 °C. Raman spectroscopy and atomic force microscopy (AFM) data showed that carbon nanostructures were produced and the shape of the DNA nanostructure was preserved. Conductive AFM measurement shows that the carbon nanostructures are electrically conductive.
DNA 纳米结构是低成本、高分辨率纳米制造的多功能模板。然而，由于纯 DNA 结构的化学稳定性有限，它们在纳米制造中的应用长期以来一直局限于低温过程或溶液相反应。在这里，我们展示了 DNA 纳米结构作为高温固态化学的模板的用途。我们表明，通过 DNA 纳米结构的保形碳化可以获得可编程形状的碳纳米结构。首先通过原子层沉积（ALD）在 DNA 纳米结构上涂覆一层薄薄的 Al2O3 薄膜，然后在 800-1000°C 的低压 H2 气氛中碳化 DNA 纳米结构。拉曼光谱和原子力显微镜（AFM）数据表明，生成了碳纳米结构并且 DNA 纳米结构的形状得以保留。导电 AFM 测量表明碳纳米结构是导电的。
