Assembly of Single-Stranded DNA Onto HOPG Surface at Different Temperature: Atomic Force Microscopy Study

作者：Liu Zhiguo^*; Zhao Lin; Zhou Zhen; Sun Tongze; Zu Yuangang

来源：Scanning, 2012, 34(5): 302-308.

DOI：10.1002/sca.21011

• ssDNA
• HOPG
• AFM
• assembly
• temperature

Assembly of long single-stranded DNA (ssDNA) and short oligodeoxynucleotides onto bare highly oriented pyrolytic graphite (HOPG) at different temperature has been studied. It was indicated that both long ssDNA and oligodeoxynucleotides can sequentially form network, straight chains, and layer structures when the adsorption temperature was changed from room temperature, 3755 degrees C. High-resolution atomic force microscopy (AFM) imaging of the layer structures revealed that they are composed of parallel ssDNA chains with relatively higher height and tend to form patterns with three-fold symmetry. These new findings are significantly important for understanding assembly characterization of ssDNA. In addition, this assembly method for ssDNA is expected to be used for preparation of DNA structures in biosensing and DNA-based nanodevices. SCANNING 34: 302308, 2012.

• 出版日期2012-10
• 单位东北林业大学